Every month we report on what’s happening with public transport patronage however Auckland Transport also report on many other metrics too such as how roads are performing. In this post I’ll look at some of those other metrics.
Instead of just measuring traffic volumes, AT use a measurement called Arterial Road Productivity which is a based on how many vehicles, how fast they’re travelling and how many people they have in them. To me this seems like a very bad metric primary because it only seems to count people in vehicles. It could also be interpreted as encouraging bigger and faster roads as a way of improving the metric which goes against many of the city’s wider goals. In saying that another way to improve the result could be improving vehicle occupancy so therefore bus lanes which speed up buses carrying more people will improve productivity. Regardless it seems that AT is performing quite well and is above target.
The second metric is AM Peak Arterial Road Level of Service and as you can see even then around 80% of arterials aren’t considered congested.
The next set of charts look at how a number of key freight routes are performing. For each of these routes AT have a target for how long it should take to travel. As you can see for almost all of the routes the target has been at least met and some such as on Kaka St/James Fletcher Dr/Favona Rd/Walmsley Rd the target has been significantly exceeded. If the results here are indicative of other parts of the road network then they certainly don’t support calls from the freight industry for significant projects such as the East-West link.
Parking obviously plays a big role in transport and AT measure occupancy rates for both on street and off street carparks. On street parks are only measured quarterly and the result is based on top four busiest hours of the day at each of the three sites around the city centre. The last survey occurred in August and as you can see at the upper level of AT’s target. This suggests there’s possibly room to increase prices to better manage demand.
Occupancy at AT’s off street carparks have dropped quite a bit recently which is almost certainly attributed to the change in parking prices at the beginning of August.
One area that isn’t looking great is road safety with the number of deaths and injuries 6% above target.
While AT don’t publish monthly traffic volumes, the NZTA does for some selected state highways. The one we look at closest is the Harbour Bridge which is currently experiencing a growth rate of around 1% p.a. Compared to the other state highways that the NZTA publish this appears incredibly low as most are experiencing growth of around 5% annually – although off a lower base.
Overall – with the exception of road safety – it seems that our local roads are not performing too badly.