I sort of agree with your point if not the conclusion. Sometimes it's seconds on an individual journey, sometimes more but the nature of those two rather different algorithms is to reduce the cumulative time all drivers spend travelling by spreading traffic across all the available routes. No AI will approach the overall problem by deliberately funneling all traffic onto the same routes and through the same pinchpoints. The growth of satnav use has directly led to lower congestion and shorter journey times, both good things.
Woaahh. Firstly - any evidence for your claims of lower congestion and shorter journey times? Anecdotally I hear of complaints that traffic speeds are slowing and congestion increasing - it certainly seems to be what the cabbies claim.
Your own ideological position seems to be fundamentally pro-car - that we should seek to maximise the capacity of the road network for motor vehicles (not for
people to move - private cars are a very space inefficient way of moving people around as average occupancy is below 1.5 people). All the evidence from studies of induced demand says that motor traffic will expand to fill the available space - widen the ring road and suddenly people start driving to the supermarket on the other side of town and congestion doesn't reduce. (can provide evidence links if you need them)
I'm also going to highlight "overall traffic levels have supposedly fallen" because the use of stats is getting beyond silly. That's a good thing, isn't it, so why not celebrate it rather than cast doubt on it? Same as upthread you cast doubt on the effectiveness of the 20mph limit. Didn't you strongly advocate that before it was introduced? Now you're downplaying the effect in order to continue to pursue the overall no-car vision you seek to impose.
You're putting words in others mouths again. I've never talked about a "no-car vision" and that's in no way what a low traffic neighbourhood is - they don't place any restrictions on ownership or use (you can still drive to any property)
I'd like to see a city that doesn't discriminate against people who either don't own cars or choose to make trips without them. I'd like to see cars used more appropriately and safely and for trips where they are really necessary. Your position seems far more ideological than mine.
Overall traffic levels
have fallen, but complaints about congestion don't seem to have gone away and anecdotally (perhaps as a result of satnavs) the couple of roads I've lived on in the last decade are all now busier
for more of the day than they were before. There isn't a research paper to show it but it seems very likely that part of the reason things don't
feel better is because cars have got larger. Oversized SUV's are now a big part of car sales. The street is the same width but if the cars parked on either side and the two trying to pass each other are all 50cm wider than they were 10 years ago you've 'lost" 2metres of width. You're going to get a lot more standoffs (and for that matter close passes of people riding bikes), or cars mounting pavements.
As I've said before, yes, completely support 20mph limit but its' the start of slowing people down. By itself it doesn't have much effect - needs a serious effort at enforcement (which is only now starting), proper penalties and really mandatory speed limiters. It seems utterly ridiculous that society faffs around putting limiters on electric assist bikes and worries about electric micro scooters but is quite happy to let someone drive a 400hp 150mph 4 second 0-60 capable car on busy London streets (and let them keep driving it even if they've been found doing so unsafely).