Jojo, Lady of the West

They’re usually built over a motorway where there was already two stoplights just to go straight, so …

I mean, maybe the muskrat is considering the car to take to Mars with him?

It could get up to a few percent of the speed of light.

So could a person sticking their head out and blowing, but it’s still a terrible idea.

Don’t forget the mass of whatever ablates from your shield!

Significantly safer to navigate in practice than traditional intersections, and very straightforward to navigate, if not quite as easy as a normal intersection you’ve seen all your life.