I am strongly in favour of enforcing speed limits - but only when such speed limits are sensible. Have road engineers (yes, such a profession exists) set the speed limit according to the climate, the shape and camber of the road, the quality of the road surface, the traffic pattern, and the pattern of pedestrian traffic. Yes, set school zones. Set 'safety' zones around hospitals as well, and give fire and ambulance stations special traffic lights or something to give them priority when needed.
But set the change in speed limit far enough away from the hazard to give a driver fair warning - or set up signs providing that warning. And if you're posting speed cameras or manned radars, do so somewhere safe but as part of the hazard area, not immediately after the change.
Human beings have a minimum reaction time. Our cars also have a minimum 'reaction time' - as in, from the moment your foot touches the brake until the speed starts to slow is a finite but definite amount of time. Your speed affects how far you travel during that minimum time.
In addition, your speed affects how far you travel while your vehicle is braking; and how much force has to be absorbed if you actually hit someone/something.
Road engineers are supposed to calculate the reasonable speed for a road based on all those factors, as well as the safety features such as crumple zones in vehicles, passenger cages, seat belts, airbags, anti-lock brakes - and the fact that a motorcyclist, bicyclist or pedestrian has none of those.
Anyway: I think my point is that I dunno about you, but I sure as shit can't make all those calculations.
But set the change in speed limit far enough away from the hazard to give a driver fair warning - or set up signs providing that warning. And if you're posting speed cameras or manned radars, do so somewhere safe but as part of the hazard area, not immediately after the change.
Human beings have a minimum reaction time. Our cars also have a minimum 'reaction time' - as in, from the moment your foot touches the brake until the speed starts to slow is a finite but definite amount of time. Your speed affects how far you travel during that minimum time.
In addition, your speed affects how far you travel while your vehicle is braking; and how much force has to be absorbed if you actually hit someone/something.
Road engineers are supposed to calculate the reasonable speed for a road based on all those factors, as well as the safety features such as crumple zones in vehicles, passenger cages, seat belts, airbags, anti-lock brakes - and the fact that a motorcyclist, bicyclist or pedestrian has none of those.
Anyway: I think my point is that I dunno about you, but I sure as shit can't make all those calculations.
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