George Monbiot has an idea of how to make it impossible to break the speed limit by utilising the black boxes needed to police congestion charges. It would probably cut road deaths, but I don’t believe it would be the cure all he imagines.
I always stick to the speed limit in 30 and 40 mph zones, but sometimes my mind wanders. Just imagine if drivers didn’t even have to concentrate on keeping to a certain speed. Knowing the machine was doing it for them, they’d start checking out the shop windows and other cars and completely fail to spot the person stepping out in front of them. And you’d still get the idiots who insisted on pushing the maximum speed allowed even when common sense dictated they should be doing less. The scheme could displace pedestrian deaths from places where speed kills to ones where distraction kills.