[Jonty30]

I agree that artificially lowering the speed can actually contribute to accidents because when it’s too low, people tend to get bored and want to be distracted.

[zeugma]

If you must have a speed limit, the The best way to set it is to build the road, monitor the speed of the people driving it for a while and then set it at the speed that 85% of the people travelled. You end up with a speed limit that is rational, reasonable, and will be generally obeyed.

Contrary to government propaganda, the vast majority of people drive at reasonable speeds no matter what the silly signs say.