scuwp:

 

Bung: Any new technology never seems to be deployed further than a short drive from the traffic control base at Ngauranga.

Regarding the Bluetooth used to drive the current journey time signs, the collection points don't correspond exactly with the destinations. Wellington CBD is past the end of the Terrace tunnel, Airport is at the roundabout at the end of SH1.

 

 

 

I would think it is reasonable while testing and trialling new technology that a convenient location that can give the system a good workout would be preferable so this should not be a surprise.  They are of course being rolled out across the whole of NZ. Perhaps the OP was seeing the system in some kind of test mode or similar?    

 

The Bluetooth travel times are only ever an approximate indication.  More accurate that ANPR (or at least were), although have a lower sample rate (every car has a registration plate, not every car has a Bluetooth device/activated).   It is also cheap and easy to install and run, and completely anonymous, so no privacy issues.  Travel time data along with traffic counts are used in traffic management and future road modelling and planning, trip time information is just a small but helpful bi-product.        

 

I suppose speeding is speeding so they get away with sticking cameras wherever but the line that get fed out is that fixed cameras only get installed at accident blackspots. Some of those locations have very high ticket rates (good for testing) yet they aren't where the accidents happen.

Bluetooth is approximate because you're reporting the time someone at a certain location sometime in the past took to do the journey when conditions could have changed in the meantime. My interest was sparked by the short interval between Wgtn CBD and Airport times as you approach Wellington. SBiddle now tells me that the 2 points are even closer than I had been told. In other words coming in from the North Taranaki/Vivian is well past the CBD and closer to the Airport point that is short of the Airport.