farfromtheland
Regular AND Goofy
Apologies Rusty Nails and First Aspect, I'll try and answer you here too.1. better traffic flow less congestion, cars less bunched up so junctions are quicker.
2. speed limits don’t teach road safety. Phone zombies gonna zombie.
3. downhills are less inspiring in built up areas whatever the speed.
4. blankets are not only permissible in Wales they are advisory in certain circumstances.
1 - 20 mph limits work (or not) in conjunction with traffic light phasing.
The phasing here has not been well adjusted to the new limits, and fewer cars make it through a phase even when traffic is light, causing more stop-starts overall. Braking and acceleration cause more pollution than steady speeds. Not exactly congestion but amounts to much the same. This is my experience. Other districts may have organised things better. Urban areas and Motorways are clearly different.
Roadworks tend to be messy here yes.
Traffic level is technically increased if cars go slower. It takes longer to get there at 20 mph than at 30 mph so we're on the road longer for the same trip. This interacts with point 1. If the number of trips made is reduced in favour of bus travel because of this, ok, but if not, not.
I feel this private journey is reduction is the aim of the limits. The introduction of 20 mph limits in Tower Hamlets was almost a cause of gridlock. I also feel there are a lot of major roads where 30 mph would make for better flow in any case. Greenwich still has some 30 mph bits with 20mph near schools, see below.
2 - If road safety education was happening, this major argument used for low limits would be somewhat negated.
There are lovely signs on side roads drawn by children to reinforce the 20 mph message. However some drivers don't respect them, and my observation is that children are less cautious in looking and listening than they used to be. This is a correlation not a related causation but it bears investigation.
3 - Hmm, maybe, but what about at night or quiet times?
4 - I don't claim to live in Wales.
All this may seem less worthy of debate than political views but the South Circular congestion has caused pollution death. Congestion zone pricing brought pollution measures down. My experience as a driver was that 20mph limits put it up a bit again. Research hasn't really happened. It's subjective for now.
I'd generally prefer to see better driving education, especially as to indicating, rather than a simple tendency to restrict in law and settle that drivers (and pedestrians) are inevitably careless.
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