jont- wrote:gannet wrote:Horse wrote:Re 20moh. It may be to do with keeping vehicles at constant speed, so reduced acceleration and braking.
possibly, on a course I recently had to do it was claimed that in one of the southern towns (I forget which one) where they introduced blanket 20mph limits, the average speed has actually increased and congestion is down...
Locals were opposed to the reduction - now fully support it...
Which average? Any mean is going to be horribly skewed by congestion at rush hour, and it's entirely believable a lower limit improves things there. But what about all the time stolen from road users in the quieter parts of the day?
And congestion in surrounding areas? Overall traffic numbers (have people simply gone elsewhere? That only works until everywhere else is also just as bad, and we move to 10mph limits ).
I'd love to be able to back it up with documentation - but none was offered, and it was said in passing to illustrate a point.