Following on from my post the other day about traffic volumes over the harbour bridge, I thought I would have a look at them for the entire motorway network. Listing a whole heap of numbers is never going to be that interesting so instead I have mapped them out colour coding each section of motorway based on how much traffic it carries. These come from the NZTAs annual traffic count data and is for both directions.
The busiest section by far is between Khyber Pass and Gillies Ave where almost 200,000 vehicles pass through while on SH18 the volumes are around 25-30k.
Looking at the total numbers is nice but it is perhaps more interesting to look at how this has been changing, this map shows the change from the 2007 numbers through to the 2011 numbers. What you can see is that large parts of the existing motorway network have been very flat or have gone backwards while there has been huge growth in numbers in areas next to where recent upgrades/additions have occurred.
Note: I have removed the sections that weren’t built in 2007