I did the speed awareness course recently, and one thing they did was show a video demonstrating the non-linear way speed decreases when you brake hard. They had Tiff Needel doing an emergency stop from 30mph and just stopping short of hitting a cardboard cut out of a woman. With the same distance with him doing only 35mph it meant he hit her at 18mph. Ouch.
The other one was demonstrating motorway speed. If braking from 70mph you just stopped before hitting the stopped traffic in front, from 100mph you'd hit the same traffic still doing 70mph. A bit more than ouch.
This made everybody sit up and take notice.
One other thing was estimating the number of serious injuries and deaths on different types of roads. I had the right idea, but underestimated the numbers. Motorways have very few serious injuries or deaths, and the most common accident is rear ending the car in front at low speed. Urban roads come next, but you're generally going slower, and rural roads are the worst because you have high speed junctions, head on collisions, trees, and there's always the possibility that you end up upside down in a ditch and nobody discovers your car for three days.
Stats here:
https://en.wikipedia.org/wiki/Report..._Great_Britain
Motorway: 6% deaths, 3% serious injuries
Urban: 42% deaths, 65% serious injuries
Rural: 52% deaths, 32% serious injuries
But of course motorways have far more traffic than rural roads.
So it's pretty clear that if you want to improve road safety motorways should be the last thing to be targeting.
The other one was demonstrating motorway speed. If braking from 70mph you just stopped before hitting the stopped traffic in front, from 100mph you'd hit the same traffic still doing 70mph. A bit more than ouch.
This made everybody sit up and take notice.
One other thing was estimating the number of serious injuries and deaths on different types of roads. I had the right idea, but underestimated the numbers. Motorways have very few serious injuries or deaths, and the most common accident is rear ending the car in front at low speed. Urban roads come next, but you're generally going slower, and rural roads are the worst because you have high speed junctions, head on collisions, trees, and there's always the possibility that you end up upside down in a ditch and nobody discovers your car for three days.
Stats here:
https://en.wikipedia.org/wiki/Report..._Great_Britain
Motorway: 6% deaths, 3% serious injuries
Urban: 42% deaths, 65% serious injuries
Rural: 52% deaths, 32% serious injuries
But of course motorways have far more traffic than rural roads.
So it's pretty clear that if you want to improve road safety motorways should be the last thing to be targeting.
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