Many of us know intuitively from experience that most dangerous situations on the road aren't created by speed, but by poor driving/riding, and are unlikely to be reduced by increased enforcement or penalties for exceeding the speed limit. But I hadn't seen actual evidence of this. So today I got some numbers together and surprise surprise there's no correlation supporting the conventional "wisdom". Probably the most relevant figure is "$Fine AUD / km/h over" To get this, I looked up the penalties for speeding in each country (all those used had a tiered system like Australia). For each tier, I averaged the speed & fine, then averaged these to come up with this figure, giving an indication of "the average amount you have to pay for exceeding the speed limit by one km/h"