Would tons of metal, filled with explosives be allowed to mingle freely with one another and pedestrians, cyclists, etc without any separation (other than a few bits of paint and a few coloured lights)?

Or would the government/the police/the HSE/whoever would decide this sort of thing turn around and say, 'you're having a laugh if you think we're going to let people ride around in 100mph+ bombs, free to drive wherever they want (and into whatever they want)' and ban it?

Would road traffic be like the railways and air traffic, where everything is separated and movements are strictly controlled?

Been thinking about this for a while...