[Dylan16807]

> According to the UK DOT the estimated pedestrian accident survival rate is 55% at 30mph and just 5% at 40mph (due to kinetic energy rather than reaction times) so 3mph in this range is not exactly an insignificant difference.

You'd have that range whether people went at the speed limit, above the speed limit, or below the speed limit. As long as speed limits are made with actual speeds taken into account (they are) that argument is irrelevant to whether you should speed. It just means that if you really want to be safe to hit someone you shouldn't go above 25mph, no matter what the speed limit is.

> The strangest thing about watching this story is that people who are apparently ignorant of this still feel sufficiently certain of the relative unimportance of speed differences in this range to sneer at other people for commenting on it.

The speed limit here was at least 40, wasn't it? Your own numbers say that the differences are unimportant above 40.

[notahacker]

The police spokesperson is quoted saying the vehicle was doing 38 in a 35mph zone, which is pretty much where the curve suggests an extra little bit of speed is most lethal. (Other reports have suggested other speed limits)