Sometimes we come across something that is so perfect and so timely that it just needs repeating as it is. This is one of those times. The following post by Charles Marohn is lifted in its entirety from StrongTowns.org
The Ideology of Traffic by Charles Marohn
The greatest accomplishment of any ideology is to not be considered an ideology; to be a belief system that is not considered a belief system. Millions of Americans went to church yesterday and every one of them knew their experience constituted a belief, that others in the world believe other things. It is when beliefs are not recognized as such that things get scary.
Last week I was in Washington State speaking to a group of mostly transportation engineers and technical professionals. My presentation was all about questioning the core beliefs of the profession, of helping the people in attendance recognize that many of their core truths are actually beliefs, and that there are competing beliefs that they should consider.
For example, when engineers design a street, they begin with the design speed. They then determine the projected traffic volume. Given speed and volume, they then look to a design manual to determine the safe street section and then, once a cross section is selected, determine the cost. This approach to design – speed then volume then safety then cost – reflects the ideology of the profession, an internal belief system so foundational that they don’t recognize it as the application of a set of values.
Of course, when presented with these values discretely and not as part of a design process – not as part of the ritual practice of their belief system – they collectively identified a different set of values. I actually had them shout out their values in order and, like the thousands of people I’ve asked to do the same, theirs came back: safety first, then cost then volume and, last, speed. Their actual values are nearly a perfect inversion of those they apply to their design ritual.
This weekend, there was an article that appeared in the NY Post titled The Real Reason for New York City’s Traffic Nightmare. I know the Post is tabloidy; the story contained all anonymous sources and lacked even a rudimentary level of fact checking that you’d find in an actual news story. Still, it fits the ideology of the traffic engineering profession and I saw the piece widely distributed. Here’s a quote:
“The traffic is being engineered,” a former top NYPD official told The Post, explaining a long-term plan that began under Mayor Mike Bloomberg and hasn’t slowed with Mayor de Blasio.
“The city streets are being engineered to create traffic congestion, to slow traffic down, to favor bikers and pedestrians,” the former official said.
“There’s a reduction in capacity through the introduction of bike lanes and streets and lanes being closed down.”
Let’s apply a contrasting value system to this quote, not one based on moving traffic but one based on building wealth. Here’s how each of these statements could be rewritten:
Ideology of Traffic: The city streets are being engineered to create traffic congestion.
Ideology of Wealth Creation: The city streets are being engineered to make property more valuable, encourage investment and improve the city’s tax base while reducing its overall costs.
Ideology of Traffic: The city streets are being engineered to slow traffic.
Ideology of Wealth Creation: The city streets are being engineered to improve the quality of the space for the people who live, work and own property there.
Ideology of Traffic: The city streets are being engineered to favor bikers and pedestrians.
Ideology of Wealth Creation: The city streets are being engineered to favor the access of high volumes of people over the movement of comparatively small volumes of automobiles.
Ideology of Traffic: There’s a reduction in capacity through the introduction of bike lanes and streets and lanes being closed down.
Ideology of Wealth Creation: There’s an improvement in the quality of the place and it’s corresponding value through the introduction of bike lanes and the closing of some streets and lanes.
Before the Suburban Experiment, cities were built with an ideology of wealth creation. That ideology was shared across the culture and, while some benefitted more than others, it provided opportunity for nearly everyone to get ahead. To understand why our cities are going broke, why they are struggling in a growing economy just to do basic things, one only needs to consider the dramatics of this ideological shift. We’ll bankrupt ourselves moving traffic and we don’t even understand why.
Vincent and Pitt, Thursday 5:49 pm. Every corner occupied with people wanting to cross, including eight on this silly little delight of a ‘pedestrian refuge’, or nine if you include me, as I stepped back into the vehicle priority slip lane to take the shot, including at least one genuine princess. There appears to be one vehicle using the intersection and another a long long way in the distance up Pitt street.
Auckland Transport have a lot of work to do to fix the dated modal priority that dominates City Centre streets as it is no longer fit for purpose. This design dates from a time when very few lived in the city, fewer worked there and those that did didn’t stay on to recreate in the city either. It is also from before the time that the economic and social value of well designed walkable streets were so well understood. People not in cars need more space and time afforded to them from the people that control this critical part of our public domain. The value of this in supporting the modern urban services economy and the social well being of everyone is overwhelming.
After all transport infrastructure is simply a means to economic and social ends; not an end in it self.
Here is a great 15 minute look back at the work of Streetsblog and Streetsfilms from New York, that articulates the motivation behind what we do here at Transportblog. However modestly compared to their output. This is a worldwide movement; the profound improvement of lives, one street at a time. It is also, I believe, unstoppable, simply because it is so effective, so overdue, and therefore so powerful.
And it is, ultimately, about ending the dominance of our streets by traffic, about returning balance to this easily overlooked but vital slice of public space. Everything is interconnected in this increasingly urban age, and the street is really were it all comes together in the city. Get the streets right and so much else will follow; from human wellbeing to wealth creation and equity, from public health to personal freedom and opportunity, from environmental sustainability to social resilience and security.
A great thing in the film is also something we are seeing here; the mainstreaming of these ideas into our institutions. This does sometimes lead to confusion for some people, as when the Council, Auckland Transport, or NZTA do something we agree with we do of course praise them, yet some people think we should only ever be critical and never supportive. This is naive and would be counter-productive. Rather we would love to be made unnecessary; we believe our views are rational and supported by evidence and deserve to be the official ones. Here’s to the next decade and more of constant improvement and reasoned and evidenced activism. And thanks for reading.
AT have now put the SMART study documents on their site, here. There’s a lot to review there and this post is not a look at the whole report and its conclusions, but rather is a response to the problem of the length of time this project is likely to take whatever mode is selected.
All of the proposals in the report are capital intensive, without any currently identified funding source, and the timing of the RT route looks likely to be complicated by the Airport’s development plans, particularly those for the second runway, so there is a good case for looking at interim improvements for Airport/RTN interconnection while these bigger decisions are being resolved. I am focussing on the airport because of its fast growth is clearly a major generator of increased traffic congestion for the whole Mangere area.
First some background from the report. Just setting aside travellers for a moment, what about the workforce at and around the Airport, what are their current patterns?:
So we can see in the above data from the 2013 census that the key connection for workers is east to Manukau area, followed by that to the centre. Furthermore that employee movement is still quite peaky, despite the airport itself obviously being a 24 hour operation:
So what opportunities are there for a quick and relatively low cost connection between the Airport and the current RTN, particularly with the above information in mind, that could be built while the full Mangere/Airport RT route is being developed, whatever the mode? The first and obvious point is that there is already, right now, great service on the spine of the Southern Line relatively close to the Airport, particularly to the City Centre, but also south and across to Manukau City. Where the red and blue lines overlap there are services every five minutes at peak. So there seems to be a clear opportunity to improve connection east from the Airport for its own catchment while that also will connect, via the rail system, the City Centre and anyone who can access a train station.
Currently the connection between rail system and the Airport is very poor, as anyone -like me- who has used it will tell you.
The 380 via Papatoetoe station is not a viable option because of three problems [the longer and slower route to Onehunga is even worse, as well leading to an equally low frequency train]:
Low frequency: 1/2 hourly service
Slow route; the 380 has no priority on its route so therefore is subject to both delay and unreliability caused by other traffic [I have been on this bus stuck in traffic for tens of minutes]
The Station/Bus physical connection at Papatoetoe does little to encourage the transfer.
So why not investigate a dedicated shuttle between the even closer Puhinui Station and the Airport on a minimum 10 minute frequency with dedicated lanes on Puhinui Rd and improved passenger interchange at the station, complete with lifts for people with luggage, and all weather cover? Puhinui is currently timetabled at 33-35 minutes from Britomart [this should improve with current work] with a train leaving every 5 mins at the peaks, exactly when traffic congestion is at is most disruptive. With bus lanes on Puhinui Rd the journey to the terminals would be a reliable 10 mins. Including an average wait time of 5 mins that’s a perfectly satisfactory 50 minute journey from Britomart to the Airport. Because this journey time is reliable and not subject to congestion and avoids the time and cost of parking at the Airport it should be competitive enough for a good proportion of travellers and workers. As shown below, there is space to build an interchange and turning space to the west [Airport] side of the station, this would need to be of interchange standard.
The Puhinui Rd/20B road and bridge are due to be upgraded or duplicated soon in the on-going work to increase general traffic access to the Airport [what you feed grows] surely it would be wise to actually include dedicated transit lanes on a bridge in Auckland for once? This is a future RTN route, the route is flat and unconstrained by buildings; these are good practical and cost arguments for bringing this section forward. Shoulder lanes, or better, a dedicated busway and bridge, LRT ready, would be real ‘future-proofing’ [a phrase it is hard not to be cynical about in Auckland as it generally means doing less than nothing in practice].
With this service then it would be viable and essential to brand both the shuttle bus service at the terminals and the Southern and Eastern line services, both of which, with no changes to how they currently run, then become true Airport services.
Of course the transfer is less ideal than a system that takes you on one seat right into the Terminal either as a flyer or an employee there, however we know many travellers currently transfer from their cars to various bus shuttles in order to get cheaper parking, and surely many workers would be happy to not to have to battle increasing congestion with a reliable and cost effective alternative. In other words by optimising the bus connection we will further unlock the value of investments recently made in the rail system. It probably makes sense on those grounds alone.
This should not be seen as instead of a north/south pan Mangere RTN, but it would surely make a good start, especially as this is the route for the future Botany-Manukau City-Airport RTN. So it would be even better if it continued to the new interchange at Manukau City, and then on to Botany and AMETI. And ensuring all hard infrastructure is built to be efficiently upgradeable to Light Rail in the longer term. Improving eastern connectivity is completely compatible with the northern Mangere routes discussed in the study, and indeed the current Airbus service, so arguably is an even more urgent direction to improve. There is no duplication in sorting this connection out first.
Incidentally this map clearly shows the other areas lacking RTN coverage: the Northwest and Upper Harbour, and the Isthmus and Mangere….
Which is exactly what AT have on their future RTN maps, but far too far into the future in my view. This is still based on last century’s thinking where every road is widened first, leading to the inevitable dysfunction and only then do we try to relieve this adding quality RT alternatives.
To summarise: we already have a high quality Rapid Transit service almost all the way to the airport, it seems to me that the addition of a high quality connection between these points would be a very useful first move in improving connectivity in this important area, especially if taken at least to Manukau City too, and as soon as possible.
We start this week with a borrowed slide explaining the way that the quality of your city’s Transit system controls the quality of your driving commute:
This explains what’s wrong with current expansion of SH16 and the completion of the Western Ring Route. The Transit part of this project is woefully inadequate: Intermittent bus lanes on the shoulder of the motorway are unlikely to lead to sufficiently fast or reliable bus travel times, this means the choice of taking the bus will probably not be attractive enough to tempt enough people away from driving on the newly widened motorway. This will lead to more induced driving and an increase in traffic congestion [which ironically will further slow those buses, because they are not on their own RoW]. Perhaps not immediately on the new parts of motorway itself, but certainly on local feeder roads and especially in the city and CMJ where the State Highways 1 and 16 and city exits all meet.
The biggest beneficiaries of high quality Rapid Transit are those who need or choose to drive. The better the alternative; the better your drive.
Staying with the value of Rapid Transit let’s head to Montréal where plans for a new layer of Rapid Transit has just been announced [in Lime Green below, with existing networks], which raises important issues around driverless technology:
Similar to Vancouver’s Canada Line, a system that CPDQ also has a financial stake in, trains will run every three to six minutes along the mainline and every six to 12 minutes on the three branch routes, including the train service from the airport to downtown. In contrast, the Deux-Montagnes commuter rail line is limited to every 20 to 30 minutes during rush hour and every hour outside of rush hour on weekdays.
But these high frequencies are only possible due to the nature of automation, which makes frequent train services significantly more economically feasible to operate. If there is a surge in demand, operators can easily and quickly increase frequency by deploying more trains by switching the controls at the operations centre.
With driverless technology, the operating costs are markedly lower than systems that require drivers and it has the potential to attract more ridership given that frequent services and superior reliability increase the utility of a transit system. Knowing that a train or bus will come soon, a transit service with a high frequency means transit users do not have to worry about service schedules. This reduces waiting times and connection times between transit services.
We really need to have a Transport Minister and Ministry just as excited about the opportunities for these technologies in the PT space as they are about them for private vehicles, the value is huge and the technology proven. SkyTrain in Vancouver has been driverless since 1985, carries 117m pax pa, and has run at an operating surplus every year since 2001.
Staying in Canada, here is how Montréal can have such ambitious city-building plans, central government is chipping in:
Building reliable, sustainable infrastructure is about making your community a better place to live. Read our plan: https://t.co/10gxRC7Fg5
Investing in infrastructure creates good, well-paying jobs that can help the middle class grow and prosper today. And by making it easier to move people and products, well-planned infrastructure can deliver sustained economic growth for years to come.
At the same time, new challenges have emerged that make the need for investment more acute: things like the rapid growth of Canada’s cities, climate change, and threats to our water and land.
Congestion in Canadian communities makes life more difficult for busy families, and has a negative effect on our economy—when businesses can’t get their goods to market, it undermines growth.
A changing climate is also hard on communities. From floodways to power grids, investments are needed to make sure Canada’s communities remain safe and resilient places to live.
Investing in infrastructure is not just about creating good jobs and economic growth. It’s also about building communities that Canadians are proud to call home.
With historic investments in public transit, green infrastructure and social infrastructure, Budget 2016 will take advantage of historically low interest rates to renew Canada’s infrastructure and improve the quality of life for all Canadians.
In Budget 2016, the Government will implement an historic plan to invest more than $120 billion in infrastructure over 10 years, to better meet the needs of Canadians and better position Canada’s economy for the future.
Frankly I expect this kind of approach to become orthodox this century. That is once we can shake the stultifying grip of last century’s habits and world view, and properly start to address the issues in front of us.
Given the social and economic toll of speeding, one might assume that we set speed limits with careful calculations aimed at maximizing safety. But that’s not exactly how it works, and a history of questionable applications of data is partly to blame.
Roads are planned according to a concept known as design speed, basically the speed vehicles are expected to travel.3 Engineers often apply the 85th percentile rule to a similar road to arrive at the design speed for the proposed road. It might make sense, then, that the design speed would become the speed limit. However, in practice, the design speed is often used to determine the minimum speed of safe travel on a road.
Confused? So was I. Norman Garrick, a professor of engineering at the University of Connecticut, explained how this works using the example of a commercial office building.
“It’s completely unacceptable for someone to die in a plane crash or an elevator,” he said. “We should expect the same of cars.”
And for some local flavour via Stuff: Drivers not coping with Christchurch’s new central city 30kph limit:
Acting Senior Sergeant John Hamilton said police spent 90 minutes on Friday to see if drivers were abiding by the new limits. Stuff witnessed about 10 drivers being pulled over for speeding on the corner of Montreal and Cashel streets within 30 minutes, including two Christchurch City Council staff.
Hamilton said most of the drivers ticketed were driving between 50kmh and 60kmh, with one motorist spotted driving 65kmh.
Now I have some sympathy with these drivers for the simple reason that the both street [see above] and vehicle design mean that to stay below 30kph in anything other than congested traffic takes a huge amount of attention and control. You might argue that we should be attentive and ‘in control’ whenever we are driving, and of course that’s true, but the fact is that most operation of the vehicle for anyone but learner drivers is a subconscious act, and in fact needs to be as we should be focussing on the environment and not constantly checking the speedo. But of course, in truth, half our minds are really elsewhere, on other things when we drive; we do it on a kind of human autopilot. So if we want drivers to keep to safer slow speeds in cities, or around schools, or wherever, we really need to change the physical environment to forcibly slow the ‘natural’ speed of those places.
As for the cars themselves, well that’s a lost cause, even the simplest little car is way overpowered and torquey for these environments: they just want to get up to highway speed and stay there. Perhaps these slow streets won’t really work until those law abiding pendants the bot-cars are ponderously pootling us around…? Note these drivers weren’t just breaking the 30kph limit they were all also breaking the old 50kph one!
Christchurch 30kph network
Related: we do like this more creative communication from some Transport Department:
Below a very interesting chart showing population change in London. I like that it has a name, and a good one, for the cycle we are clearly in now: City Renaissance and that it dates its beginning unambiguously to the early 1990s:
Note also that London’s population growth in this City Renaissance period has decidedly been both up and out, not just up. The rest of the paper, City Villages, PDF, from the Institute for Public Policy Research is very interesting too and relevant to Auckland’s situation. Basically the housing supply problem can be pretty clearly matched to the abandonment of public housing construction under neoliberalism, same as in NZ. Despite population growth, State and Council dwelling numbers have been falling not growing in recent decades:
And lastly, something from the energy transition department. Luís de Souza is a scientist from Portugal who is always worth reading on energy supply, especially for anyone interested in the longer term trends than the noise of the trader market as reported in the MSM. Here he is calling 2015 as the year of Peak Oil:
Titling the last press review of 2015 I asked if that had been the year petroleum peaked. The question mark was not just a precaution, the uncertainty was really there. Five months later the reported world petroleum extraction rate is pretty much still were it was then. This is not a surprise, but the impact of two years of depressed prices is over due.
Nevertheless, during these five months of lethargy the information I gathered brings me considerably closer to remove the question mark from the sentence and acknowledge that a long term decline is settling in. Understanding the present petroleum market as a feature of the supply destruction – demand destruction cycle makes this case clear.
So happy Birthday Queen Victoria [yes it’s actually her birthday], and happy reading…
It’s a perfect storm really. The CRL works plus other street and building works are combining with the recent sharp increase in pedestrian and bus numbers to pretty much infarct the Central City at any time of the day. The City-sandpit is not going to get better until the CRL is actually running in 2023, which seems a very long time away.
Sure some important improvements loom large; the Wellesley St bus corridor and better stations and priority on Fanshawe St will clearly help. But it’s also certain that both pedestrian and bus demand will continue to rise because 1) the number of people living, learning, and working in the City Centre is growing rapidly and is likely secular* 2) PT uptake is currently running at about 3 times population growth across the city.
Time and Space
In the medium term AT is keen to add Light Rail in a ‘surface rapid transit’ pattern down the length of Queen St, which certainly would add significant high quality PT capacity on a route that, aside from the CityLink and Airbus, is not used much for PT, nor does it provide substantial private vehicle volume [properly understood, and executed well, LRT on Queen offers new capacity on a route that is currently hiding in plain sight]. This is a good plan, but like CRL, not a quick one. It’s only just begun its battle for believers in Wellington. And anyway, delivering this system would involve even more street works and therefore further disruption, which alone could significantly stand in the way of it happening in the near term. So sorting Centre City street allocation should be front and centre of AT’s senior management group’s attention. Perhaps, in this sense, the CRL works are a test of this group’s attention to detail and creativity?
It seems plain things have to be done now and probably every year until the big PT improvements are finished ready to do their heavy lifting. Bus vehicle supply is clearly a problem which is being addressed, albeit in a Dad’s Army kind of way. But other operational issues must follow too.
AT and AC need to immediately address the allocation of roadspace and signal settings in City Centre. Currently both exhibit legacy private vehicle privilege over other modes, which is completely at odds with the strategic direction of the city centre and the efficient running of all systems. Crossing cycles and crossing opportunities have improved for the dominant mode: pedestrians, but this has been been additional to other priorities rather than substitutive. The throughput of people and goods on these streets is not what it could be; there are simply too many space eating cars preventing higher capacity and value transport modes. Cars are given too many options and too much cycle time at critical intersections, which in turn requires more road width to be used for dedicated turning lanes.
Streets in the city centre are increasingly inaccessible for truck and trade vehicles and, importantly, also for emergency vehicles.
Our pavements and crossing cycles are pumping ever more people through on that brilliantly spatially efficient mode; walking, as can be seen in the shots here. Less visible, of course are the numbers of people in the buses. In the photo above we see 12 or so buses. As it’s the afternoon peak they’re likely almost full so together will be carrying approximately 500 people. The cars maybe a total of 10-15 people. So why is so much space dedicated to cars?
Buses that are not moving are not only belching out carcinogenic diesel fumes for us all to inhale, and C02 to help fry the biosphere, but they are also wasting our money; buses stuck in traffic cost more. On proper bus lanes or busways, buses can do much more work. Average speed on the Northern Busway services, for example, is 40kph, whereas other buses average 20kph. Faster buses not only cost less to operate but they also attract many more (fare paying) passengers because they are more useful.
AT really need to make some clear decisions about private vehicle priority in the city centre. Right now it’s a dog’s breakfast that is neither working well nor reflects policy.
The City East West Transport Study highlighted the importance of east-west traffic movements between the north-south routes of Symonds St in the east and the unlovely couplet of Hobson/Nelson in the west. Queen St is actually not that important for private vehicles, it is cut off at each end by Customs St and K Rd, neither of which supply it with either motorway traffic nor major bus routes. Outside of Hobson/Nelson all motorway traffic from the rest of the city arrive perpendicular to Queen before heading across the valley to parking structures, and the major bus routes likewise all are on either side of it, save some recent additions and the Airport and City Link service. The critical mode on Queen St are the pedestrians, and the cross town vehicle movements that need to traverse the street, albeit briefly. Driving along Queen St needs to be diminished as it is largely pointless [no vehicles entrances on Queen St], and because it disrupts these more valuable movements.
So what can be done ***immediately*** to assist the east-west direction without compromising pedestrian movement on Queen and it’s smaller parallel routes?
The obvious first step would be to remove the near useless right turns at Wellesley and Victoria. Restricting general traffic to straight ahead and left hand turns would greatly simplify the cycles to only three: Ped Barnes’ Dance, east-west traffic, and north-south traffic each running concurrently. Clearing these intersections more efficiently and reducing the addition of pointless traffic onto Queen St a little. Such an arrangement will likely happen post-Wellesley Street bus corridor so why not make it happen now?
Two other moves on smaller streets would help too. The right hand turn out of Lorne St looks particularly disruptive for its utility, and using High St to exit the Victoria St parking building is still a terrible thing and really needs fixing, too much space is stolen from pedestrians there and the resultant traffic blocks the mid block of Victoria St East.
High St 4:32pm
Anyway it is policy to get the cars off Queen St one day, so why aren’t we working more deliberately towards that in increments? Do we really have to wait for Light Rail to achieve this? Let’s get the important east-west road priority happening along with complete bus lanes on Queen St as a way to prepare for the glorious future; because for the foreseeable, glamorous or not, buses will have to do most of the heavy lifting in the City Centre.
A strangely people-free picture of a future lower Queen St.
secular = Economics(Of a fluctuation or trend) occurring or persisting over an indefinitely long period: ‘there is evidence that the slump is not cyclical but secular’
The Additional Harbour Crossing as currently proposed is a pair of tunnels containing six traffic lanes between the motorway at Esmonde Rd rejoining it at Spaghetti Junction [The CMJ] in the city. The publicly available schemes also show additional rail tunnels between Akoranga and Wynyard Quarter, but no connecting network for any trains to actually use. It is clear to see the appeal for NZTA of straightening and simplifying SH1 past the bridge, but the outcomes for the city are much less certain. Below for example is version T1:
Clearly this or the other versions that date from 2010 are not the current versions NZTA are developing now, but until new versions are released these are still worth looking at in some detail as neither the various physical constraints or the overall aims that drive these options have changed. The options can be seen here.
Considering these there are several high altitude observations I think are important to begin with:
This will be the most expensive urban transport project ever undertaken in NZ; claimed to be $4-$6 billion. Two to three times the cost of the CRL.
Not least because of the massive cost it is extremely unlikely that both sets of tunnels and systems would be undertaken at the same time. They will be staged; one will precede the other.
The road scheme is essentially a SH1 bridge bypass, and therefore optimises through traffic, however it does not make any new connection that is not currently available nor in fact any increase in capacity on SH1.
There is little spare capacity in the CMJ for additional vehicles so the new connection will remain the current three lanes north and a reduction from four to three lanes south.
Essentially the bridge becomes a massive on/off ramp for city traffic and unless and until the rail tunnels and line are built more buses on bus lanes across the bridge will be the PT part of the project.
Here’s the set of variations currently available for the city end, all versions involve four tunnels under Victoria Park [3 new ones]:
All schemes also involve massive new interchanges on new reclamations at the North Shore end with flyovers and multiple connections between crossings, not unlike the new interchange at Waterview currently being built. Like the outcomes for traffic on North Shore local roads, the impacts of this project will be neither small nor all positive north of the bridge. However for this post I just want to focus on the city-side implications.
Assuming the road crossing is built first, which is consistent with assertions by politicians and officials with phrases like it will be ‘future proofed for rail’, as well as the lack of any real work yet on a rail crossing, it is worth asking exactly where will the new traffic enabled by the extra capacity across the harbour go once in the city?
Because the new crossing plugs directly into the CMJ, three lanes in and three lanes out, and because there are no planned increases in capacity through the CMJ, nor any space for any without further massive tunnelling, in effect the new capacity will be all on the bridge, so coming from the Shore this new traffic will all have to be accommodated by just three off ramps [same in reverse heading north]:
Cook St; with new direct connections through Victoria Park
Fanshawe St, especially for buses on new bus lanes
Shelly Beach Rd, and then on to Jervois and Ponsonby Rds.
None of these exits can accommodate any increasing in traffic well, or without considerable disbenefit, especially if that increase in traffic is large.
Cook St is pointed directly at the heart of the city, so this contradicts policy of reducing vehicle volumes in the city centre and is likely to infarct daily at the peaks as Cook St is close and perpendicular to Hobson and Nelson Sts which serve the Southern and Northwestern motorway flows. Gridlock is likely at the controlled intersections unable to handle large and peaky traffic volumes to and from these motorways. Additionally land use in this area is changing and intensifying making it even less suitable for the high speed motorway offramp it already hosts.
Fanshawe will have reduced capacity for general traffic as a multilane Busway will be required to take the increased bus volumes from the bridge, and anyway is already at capacity at the peaks.
Shelly Beach Rd is a narrow residential street not suited to the high volumes and high speeds it already suffers from the bridge now. Furthermore there is no benefit and little capacity for the streets beyond Shelly Beach Rd, particularly Jervois and Ponsonby Rds for a large increase in vehicle volumes.
Nonetheless, here are the forecasts they have come up with, Shelly Beach Rd with a 63% increase, is basically filled with bridge traffic by 2026 and the new crossing:
20,300 additional cars modelled for Fanshawe + Cook St with the AWHC option (assume that is all day on a weekday?). Even at the best sorts of turnover that would require around 10,000+ new carpark places. The downtown carpark has 1890 spaces. So where exactly do we put six new downtown carpark buildings? And what six streets get sacrificed to feed them?
20,300 cars carry perhaps 25,000 people. The CRL at capacity will carry that entire amount in 40 minutes. As could a North Shore rail line of similar specification. If the net outcome of this project is to take 20,000 commuters to midtown, why not do it with rapid transit at a third the cost with none of the traffic congestion?
“The significant increase in traffic movements conflict with many of the aspirations outlined in current Council policies, strategies, frameworks and master plans.”
Obviously these higher traffic volumes are not good for every pedestrian, resident, and general city user in these areas but there is one other group that this situation in particular is going to make miserable, and that’s the motorist. There is a word for all this additional driving everywhere on city streets: congestion. Yup this increase in capacity across the harbour may speed that part of the journey but it’s going to make arriving anywhere in the city in your car much more hellish than it is now. And don’t even think about finding or affording somewhere to park.
What NZTA’s consultants say about this:
The increased traffic flows through St Marys Bay on both Shelley Beach rd and Curran St look to lead to particularly poor and unfixable outcomes:
It seems optimistic to say that because there are cafes, and strongly increasing pedestrian volumes, on Ponsonby Rd, that drivers won’t try to drive there, especially if other bridge exits are controlled or too busy. After all the first rule of urban traffic is that it will expand to wherever it is allowed to go. So, in the end, taking measures to dis-incentivise drivers to use these exits, is the consultant’s advice:
It does seem kind of odd to spend $4-6 billion to increase capacity across the harbour only to then introduce other measures to try to stop people using it.
And it won’t be just parking, there’s also likely to be tolls, it appears the model says they can pretty much eliminate the traffic problem with an $8 toll!:
If only there was a way to enable more trips without inducing more and more cars to also be driven into the crowded city streets. After all the City Centre has been growing strongly without adding more cars most of this century:
In fact it looks like we are already at or even above the limit of desirable vehicle numbers in the city, and future developments like replacing car access to Queen St with Light Rail are likely to make even current numbers face pressure.
Additionally there is an issue with bus volumes as well as car numbers on the city streets, even though the New Bus Network, the CRL, and Light Rail, if it happens, will reduce bus numbers from other parts of the city, there is certainly a limit to the numbers of buses from the Shore that can be comfortably accommodated too. Below is the predicted year of maximum bus capacity at major entry points to the city. The role of the CRL in reducing bus number pressure from the Isthmus is obvious, so why not do the same thing for buses from the Shore?
So perhaps the answer is to reverse the assumed staging and build the rail Rapid Transit tunnels first, leaving space for the road crossing to come later. This certainly looks physically possible in the maps above. This would enable all of those possible trips across the Harbour that NZTA identifies to still be served but without any of the traffic disbenefits that so clearly dog the road only crossing. In terms of people capacity two rail tracks can carry twice the volume of six traffic lanes. Furthermore it can be built without disturbing the current crossing and its connections. And rail crossings have proven in the past to be good alternative routes in an emergency.
This would add the real resilience of a whole other high capacity mode across the Harbour instead of simply more of the same. It would make our Harbour infrastructure more closely resemble Sydney’s where most of the heavy lifting in terms of people numbers is done by Rapid Transit, as shown below. We already have ferries, buses, and cars bringing people across, isn’t it time we added the particular efficiency of electric rail?
It seems particularly clear that whatever we add next really can’t involve trying to shove ever more vehicles [cars and buses] onto our crowded city streets; that will simple hold everyone up.
All the information above was gleaned from the work done some six years ago for NZTA, from here, and Auckland has moved on a great deal from where it was then. Among other things that have been proven recently is that when we are offered a high quality rail system we will use it. We are also discovering the value of our City Centre as a place to live, and work, and just be in, and how this is only possible to continue this improvement with fewer cars on every street. We certainly believe that there are more options for a far greater Auckland than the simple binary ones studied above: the road crossing ‘future proofed’ for rail, or the ‘Do Minimum’ which is nothing.
So we have asked, as part of the Auckland Transport Alignment Process, for a Rapid Transit crossing as the next additional crossing to be modelled too. So we can compare the status quo with the road crossing, and with a Rapid Transit crossing separately. Additionally we know that AT are now working on how various rail systems could work so in time there will be properly developed rail options to compare with the road one.
There is time as well as the need to get this right, the Western Ring Route will begin to become more complete next year with the opening of the Waterview tunnels, and that whole multi billion dollar system is of course an alternative harbour crossing system and will alter both the performance of both the Bridge and the CMJ. Similarly decisions about AT’s proposed LRT system too has a bearing on options, as will the opening of the CRL next decade. Not least because the addition of these high quality systems will make movement through the city without a car much more common, as is the case in many overseas cities of Auckland’s size and quality.
The road crossing looks very much like an extremely expensive ‘nice to have’, that duplicates and tidies up the State Highway route, something to add when the missing alternatives have been built and there is spare budget to spend on duplication. Because on balance the road first additional crossing proposal really achieves little more than this:
Follow the link for the full PDF, below is a summary of the seven ways NZTA have identified as beneficial. Followed up by a few images that do the same thing.
1. Investing in cycling is giving people what they want
People want cycling infrastructure. Many people say they’d like to cycle more, especially if separated cycling infrastructure was provided.
2. Cycling makes towns and cities really liveable
Cycling improves quality of life in towns and cities. ‘Quality of life’ rankings consistently show bike-friendly cities at the top.
3. Cycling makes travelling around urban areas better for everyone
More people cycling potentially improves traffic flow so travel times are shorter, more predictable and reliable, and the transport network performs better. Bicycles are considered to impose 95 percent less impact on travel flow than an average car.
Getting just a few people onto bikes can15 make a di erence to tra c ows. On the congested 5km Petone to Ngauranga section of State Highway 2, for example, research suggests that only 10-30 vehicles out of the 250-280 vehicles occupying the space at congested times are causing the congestion.16 Evaluation of Hastings’ iWay cycling network indicates there was a 3.6 percent reduction in tra c volumes soon after it was built.17
4. Cycling is great for the local economy
Cycling saves people money to spend in their local communities. With no fuel, registration, warrant of fitness and parking costs, and much lower purchasing, maintenance and insurance costs compared to operating a car, people who cycle have more money to spend on other things.
Cycling potentially also boosts retail spend. Various studies have shown that cycling infrastructure can lead to an increase in retail sales.25 People who cycle have been found to be more likely to stop and visit shops more often, and to spend more money at those shops over time, than people who drive.26 Cycleways that run past shop doors can be a very good thing for retailers.
5. More cycling means reduced costs for the council
An increase in cycling saves councils money. This is especially clear where populations are expected to grow. In Christchurch, for example, where 50,000 additional car trips per day are predicted in the city by 2041 unless there is a mode shift to walking, cycling and public transport31, more cycling would mean reduced costs for additional road capacity, maintenance and operations.
6. Cycling is great for the environment overall
A small reduction in short vehicle trips potentially generates signi cant reduction in carbon emissions. Shifting 5 percent of car trips to bicycle could reduce emission impacts by up to 8 percent.33 Similarly, reducing trips by car can reduce the amount of other air pollutants.
7. Cycling makes people healthier and more productive
Cycling reduces the incidence of a range of serious illnesses.
In New Zealand, physical inactivity contributes to around 8 percent of all deaths37, and one in three adults and one in ve children are overweight38. The Ministry of Health reports that only 50.5 percent of New Zealand adults are regarded as sufficiently active for health benefits and physical inactivity is the second leading risk factor of disability adjusted life years.
There are many reasons to be concerned about the plan to add more road lanes across Auckland’s Waitemata Harbour: from the extreme cost of building such big tunnels and interchanges [$5-$6 billion and four times as much as just building rail tunnels], to the undesirable flooding of city streets and North Shore local roads with even more cars, to the increase in air pollution and carbon emission this will create, the loss of valuable city land to expanded on and off ramps and parking structures, to the impact on the harbour of exhaust stacks and a supersized motorway on the Shore, to the pressure this will put on the rest of the motorway system particularly through the narrow throat of Spaghetti Junction. It is both the most expensive and least efficient way to add capacity across this route, and if resilience is the aim then the double-down on reliance the motorway system rather works against this. This one project will simply crowd out any other changes we could make of scale in Auckland or the country for years; yet it changes almost nothing; it simply enables more vehicles to travel across a short point in the middle of the city, yet this is by no means an obviously good thing: The list of unwanted outcomes from the current proposal is so extensive that the benefits had better be so extraordinary and so absolutely certain in order to balance them all.
But perhaps there is no greater reason to not do it than that it simply won’t improve things for drivers.
Really? How can this be? As well the obvious problem with this project that it will add super capacity for a short stretch of the motorway network and therefore just shifts any bottleneck to the next constriction, particularly the extremely difficult to expand CMJ or Spaghetti Junction, there’s also a bigger structural problem with building more roads to fight traffic congestion. It can’t work. We all have experienced being stuck in traffic on a motorway and sat there wishing if only the authorities had just built an extra lane all would be sweet, well it would, wouldn’t it? However the evidence from all round the world shows that while that may help for a little while it never lasts, especially in a thriving city and especially if these extension starve the alternatives of funding, condemning ever more people to vehicle trips on our roads. Soon we’re stuck again wishing for another few billions worth of extra lanes all over again.
Here’s how it works; each new lane or route simply incentivises new vehicle journeys that weren’t made before; a well known phenomenon called induced demand. Road building is also traffic building, the more we invest in roads the more traffic and driving we get, and not just on the new road; everywhere. Traffic congestion is, of course, simply too much traffic, too much driving. Take for example the I-10 in Houston, the Katy Freeway. In that famously auto-dependent city they freely spent Federal money and local taxes disproportionately on just one way to try to beat traffic congestion, the supply side: ever more tarmac [Houstonians can boast the greatest spend per capita on freeways in the US]. The I-10 which began at six to eight lanes has just had its latest ‘upgrade’ to no fewer than 26 lanes! That ought to be more than enough in a flat city with multiple routes and only half the population Los Angeles. So what happened? According to recent analysis it has made driving this route significantly worse.
Traveling out I-10 is now 33% worse – almost 18 more minutes of your time – than it was before we spent $2.8 billion to subsidize land speculation and encourage more driving.
But hang on, those trips must need to be made, right, or people wouldn’t make them. Well in the absence of direct pricing it is hard to know exactly how valuable these new trips are. So first they really ought to price routes like the I-10 properly to reduce unnecessary journeys clogging up the valuable ones, like the truckies and trades [it is partially tolled now]. But the real problem in cities like Houston is the absence of any useful alternatives to driving [an earlier extension of I-10 took out an existing rail line!]. Providing those alternatives is how congestion is best dealt with. Not completely solved of course, that can only happen by collapse of the city economy like in Detroit, and no-one wants that solution. But traffic congestion can be made both manageable and, for many, no longer an issue, by providing them with attractive alternative options. And in turn this frees up the roads sufficiently for those who have to or prefer to drive. Especially when this is done in conjunction with direct price signals- road pricing; tolls or network or cordon charges.
Most people will take whichever transport option is fastest. They don’t care about the mode. If public transport is quicker they’ll catch a train or a bus, freeing up road space. If driving is quicker, they’ll jump in their car, adding to road congestion. In this way, public transport speeds determine road speeds. The upshot is that increasing public transport speeds is one of the best options available to governments and communities wanting to reduce road traffic congestion.
This is called the Nash Equilibrium [I would rather say better than faster; there are a number of variables including speed that inform our choices];
This relationship is one of the key mechanisms that make city systems tick. It is basic microeconomics, people shifting between two different options until there is no advantage in shifting and equilibrium is found. We can see this relationship in data sets that make comparisons between international cities. Cities with faster public transport speeds generally have faster road speeds.
Which brings us to the Waitemata Harbour. It currently has 13 general traffic lanes across two bridges, one walking and cycling lane on the upper harbour bridge, and some ferry services generally not competing with these crossings. The Harbour Bridge carries increasing numbers of buses from the hugely successful Northern Busway, the very success of which exactly proves the theory of the equilibrium described by Dr Ziebots above. In the morning peak the buses carry around 40% of the people without even a single dedicated lane on the bridge itself. And it is all the people using the busway that allow the traffic lanes to move at all. In fact NZTA argue that one of the main reasons for building a new crossing is the numbers and the size of the buses now using the current one.
The Upper Harbour Bridge is about become significantly busier because of the multiple billions being spent on the Waterview connection between SH20 and SH16, the widening of SH16, and the bigger interchange between SH81 and SH1 on the Shore. These huge motorway expansions will generate more traffic of course, but also will provide an alternative to driving across the lower Harbour Bridge.
What is missing anywhere between the North Shore and the city is a Rapid Transit alternative to these road lanes. Like Sydney always has had.
It is its [Sydney Harbour Bridge] multi-modality that makes it truly impressive, some 73% of the people entering Sydney on the Bridge from the Shore at this time are doing so on just one of the train lines and one bus lane; a fraction of the width of the whole structure. So not only does it shame our Harbour bridge aesthetically it completely kills it for efficiency too.
Auckland’s bridge was always only ever designed for road traffic, and should be left that way, the clear way forward is to add the missing Rapid Transit route as the next major additional crossing [after adding the SkyPath to the existing bridge].
In 1992 it [Sydney Harbour Bridge] was supplemented by a pair of two lane road tunnels that up the cross harbour tally for this mode to match the number coming over by train [bridge plus tunnels = 12 traffic lanes], but that wasn’t done until the population of the city had hit 3.7 million. The high capacity systems on the bridge saved the people of Sydney and Australia from spending huge sums on additional crossings and delayed the date they were deemed necessary by many decades. But anyway, because the additional crossing is just road lanes it only adds around 10% extra capacity to the bridge. To think that the government here and NZTA are seriously proposing to spend multiple billions in building a third Harbour Crossing in Auckland with the population only at 1.5m, but not only that but they are planning to build more capacity for the least efficient mode; more traffic lanes.
The good people at NZTA of course know this, but we just seem stuck in a bad habit of road building in a similar way as Houston is, because the money for motorway building comes from central government some people believe this makes it free, in a similar way that the highways in the US are largely funded by the Federal government, unlike public transport, which is more locally funded [Known as ‘path dependency’ and is well covered in the academic literature: Imran, Pearce 2014]. This means the pressure to evaluate the effectiveness of motorways over the alternatives is much weaker. Here is a slide from an NZTA presentation proudly proclaiming how much more traffic this massive project will generate:
Of course this growth can be met by a parallel Rapid Transit system instead. The success of the Busway here and the enormous uptake of the recently improved Rail Network show that Aucklanders are the same as city dwellers everywhere and will use good Transit systems when they get the chance. And two much smaller and therefore cheaper train tunnels have much greater capacity than the proposed six traffic tunnels. Twice as much in fact: the equivalent of twelve lanes and without adding a single car to city streets. Furthermore converting the Busway to a rail system, which is entirely possible, and depending on the system may even be quick and easy, means that buses can be completely removed from bridge freeing up more capacity there for general traffic; cars and trucks:
Removing buses from the existing bridge would free up some capacity. 200 buses per peak hour ~= 1,000 cars ~= 60% capacity of a traffic lane. So a dedicated PT crossing provides car users with an extra lane (once you account for reverse direction). Not huge, but not negligible either.
Mode shift: by providing a fast and more direct alternative route you will get mode shift, providing more space to the cars that remain. So you have more vehicle capacity and less demand = a real congestion benefit.
So compared to a new road tunnel where both crossings would need to be tolled, and simply generate more competing traffic for drivers through the whole city, the dedicated PT option would seem to be better even for motorists. The better, faster, and more attractive the Rapid Transit route the freer the driving route will remain; with more people choosing the car-free option: The higher the Transit utility; the higher the driving utility.
Of course while a rail crossing will be considerably cheaper to build than a road crossing it still needs a network either side of the harbour to make it useful. Are there good options for this? In fact there are a number of very good options, all with varying advantages and disadvantages that need serious investigation. And it is important to remember by the time this project is being built the public transit networks in Auckland will be considerably more mature. The City Rail Link will have transformed the newly electrified rail network to a central role in the city, it will quickly have doubled from 2015’s 15 million annual trips to 30 million and more. The New Bus Network will be functioning and with the new integrated zonal fare system meaning people will be used to transferring across routes and modes to speed through the city. The increase in bus numbers and population will make driving in the city less functional. There will certainly many tens of thousands more people in the city without their car, many with business or other reasons to travel across to the Shore. And importantly there will almost certainly be a new Light Rail system running from the central isthmus down Queen St and terminating downtown.
The quickest and cheapest to build will probably be to take the city Light Rail system through Wynyard Quarter and across the harbour, as outlined by Matt here. The busway can be most easily converted for this technology, as it is already designed for it. Furthermore being the only rail system that can run on streets it can also most easily include branches to Takapuna and even Milford to the east, and from Onewa up to Glenfield. This also has the advantage of balancing the existing city-side routes, unlocking a downtown terminus, not unlike the CRL does for the rail network.
What a North Shore light metro network map might look like.
Higher capacity and with the great advantage of cheaper to run driverless systems are is Light Metro like the massively successful SkyTrain in Vancouver. As described for Auckland here. However like extending our current rail system to the harbour it would require a more expensive city-side tunnel to Aotea Station for connection to city network. We know work has been done to prepare Aotea station for this possibility. Matt has also explored other variations here.
Perhaps the best answer for both the near term and the long term is to build tunnels that can take our new Light Rail vehicles for the years ahead but are also capable of being converted to the higher capacity Light Metro when the demand builds so much to justify the further investment of the city tunnel between Wynyard and Aotea Station. Bearing in mind the LR vehicles AT are planning for are high capacity [450pax ] and they can run in the cross harbour tunnels and the busway at very high frequencies. And that Light Metro systems can use track geometries much closer to LR than can conventional rail systems.
So in summary, the bane of the motorist and the commercial driver, traffic congestion, is best dealt with on the demand-side as well as the supply-side. We have spent 60 years just supplying more tarmac, and now it is time to get on with addressing the demand side: Building quality alternatives and providing clear incentives to fine-tune peoples choices.
And, just like road building, investing in quality Rapid Transit will grow the demand for more of it. It will also shift land use, incentivising agglomeration economies and greater intensification around transport nodes, as well as individual habits to suit this option more. What we feed, with infrastructure investment, grows. And vitally, inducing this sort of movement instead of driving is entirely consistent with other the demands of this century; especially our country’s new commitments to reduce our carbon emissions, and the use of our own abundant and renewably generated energy.
This project is both so expensive and potentially so valuable or so damaging that it needs a fully informed public debate about the possibilities. Gone are the days that NZTA can just keep building what its used to without real analysis of all alternatives, or that a politically expedient option sails by without serious evaluation. Because it can be transformed into a truly great asset for the city and the nation on this important route from the eye-wateringly expensive and clearly dubious idea from last century that it is now.