You may recall the Draft Future Urban Land Supply Strategy that the Council consulted on back in August which looked at the greenfield land that was to be released along with the costs of the infrastructure needed to service it. The outcome of the consultation is due soon however Auckland Transport’s presentation that I wrote about yesterday gives some more detail on the future transport networks needed for some of these major areas.
The detail comes in the form of some maps with lines to show some of the major projects needed.
First in the South where combined 40-50,000 new dwellings are expected to eventually be built. As you can see in state highways, arterials and public transport infrastructure the transport costs are expected to be in the range of $2.8-3.7 billion. Some projects such as the widening of the Motorway are currently underway and Auckland Transport seem confident that they get electric trains to Pukekohe sooner than originally intended through the use of battery powered trains. You can also see some of the other major projects include extending the Mill Rd corridor all the way to Drury, some sort of bypass of Pukekohe and an east-west route linking Mahia Rd across the railway and motorway – which seems like a very tricky and therefore expensive piece of work.
Next up is the North West where 24-30,ooo dwellings could be built. The major transport infrastructure up here is expected to cost up to $1.5 billion and include an upgrade to SH16 – which is busier than any RoNS outside of the Auckland Urban area. Also included is to extend a number of arterials and potentially another one to serve parts of Kumeu. The map shows the busway stopping at Westgate however I understand AT are now looking to take it all the way to Kumeu.
Included with the image of Kumeu is a map showing where commuters who leave Kumeu are travelling to. As you can see the biggest destination is to the North Shore. With all of the employment growth expected in the area (Westgate and between Hobsonville Rd and the motorway) I’d expect most of the travel demand will shift there.
In the North around Dairy Flat/Silverdale there are a similar number of new dwellings as the Northwest that are expected to be built. The transport costs are a bit higher here at up to $2.3 billion and includes extending the busway to Orewa, widening the motorway, Penlink and an upgrade and extension of Dairy Flat Highway.
Speaking of Penlink AT have created this video for it which is in relation to their decision to push for the designation to be for a four lane road.
Lastly is the growth in Warkworth of around 5-6,500 dwellings. To put that in perspective the current urban/suburban area of Warkworth had around 1700 dwellings as of the census. You can see the Puhoi to Warkworth motorway to the west of the development and the proposed Western Collector – which was to have provided a bypass of Warkworth before the motorway came along – and the Matakana Link Rd. On the latter there’s been talk that it might connect directly to the end of the motorway but based on this map it now appears not. Once both the development and motorway are built how long will it be before there’s calls for for another interchange to connect to it?
A quick calculation suggests that all up the development will enable 94-117k dwellings. AT Auckland’s current average occupancy rates that suggests just over 300,000 people would be living in these greenfield areas which is about 40% of the projected growth Auckland is expected to get. This growth doesn’t come cheap though with the estimated cost varying between $5.9 billion and $7.8 billion. That puts the major transport costs alone at an average of almost $67,000 per dwelling.