Well for a start you are far more likely to have a fatal accident at 100mph. Other road users won't anticipate your speed and a car is far less forgiving of any tiny error of judgment at 100mph than it would be at 70mph.
Really, a bad error of judgement or poor steering at 70mph is going to end nastily, pretty quickly.
Even at 50mph, and I speak from experience on black ice, a car losing traction is a highly unpleasant experience. At 70 or 100mph, its curtains so the speed is really irrelevant in extreme situations.
Lets also consider the fact that if everyone drove at 100mph, there would not be this differential in speed. And anyway, one car going 70 into the back of another is nasty and even at 100mph is very nasty, but consider a rural road where two cars are going 50mph withing feet of each other, what if they hit. There is your combined 100mph. Should everyone drive no more than 20 in case something goes wrong?
Often it's the consequences for those not in the speeding vehicle. The kinetic energy of an object increases proportionally to the square of the speed. Therefore a vehicle travelling at 100 mph has twice the kinetic energy of one travelling at 70 mph. That can have a devastating effect on innocent people and object s caught up in any incident.
If we have a desire to explore what the law deems as excessive speed, then the appropriate place to do that is the controlled environment of the track - less roadside furniture, everyone (hopefully) travelling in the same direction, mandatory safety gear, etc.
If one car travelling at 70 and another at 100 both do an emergency stop at the same time, when the car doing 70 stops the other will still be doing 70 mph.
Better to avoid an accident in the first place I reckon.
I was making the point that if both cars hit something at 70mph and at 100mph and make no attempt to stop or swerve, the outcome is the same. Death for the occupants and bystanders, actually, hit a person at 40mph, its game over. Why not make sure no one goes above 20mph in the very slim chance someone gets hit.
On a motorway or DCW there are times you can see a distance which allows you to stop a car, with room, from speeds greater than 100mph. On these occasions, its not dangerous. And if you use the what if you get a rear blow out at 100mph, I'd ask what if you get a rear blow out at 70mph. Its probably curtains time, so the speed really is an irrelevance.
I am not speculating on the odds of the chances of a collision being greater at 70mph or 100mph or that of peoples abilities to control a car at either speed worse case. Just the absolute net effect of a crash at 70mph. Something I hope I never experience.
Sorry *** I missed your post. Thank you for your comment, i think also we must consider the consiquences of speeding in built up areas too where the risk in much greater
Correct, we should, and I should have made my post clearer that I did not mean built up areas. This is probably the area of driving where you speed will have a much greater outcome to the affect on human life in the event on a collision. Drive at 30mph or under and if you hit, chances are in the persons favour, drive at 40mph, chances are they will not. Combine that with reduced stopping distances. On a DCW, 70mph...90mph, net effect is the same really.
People, at my work tell me off for driving fast (I like driving fast on rural A and B roads and an element of speed on a DCW/Mway when there is nothing else around).
Those very people, all of them parents of young children, are the very same ones that shoot past me on an urban DCW on school run time yet chastise me for the manner I drive on quiet, fast, sweeping roads. The speed limit is 40mph, there are two stops where lollipop ladies come out, and every day I obey this, and multiples of people do not.