You'd think it'd be the other way around. red... stop... bright.... hmmm.
Anyway, around the highways going into downtown, theres frequent quick stops. I usually have my eye on the person behind me, especially when I go to brake hard. Then, I'd leave a decent space in front of me, which I've used to move up really quick to avoid a potential accident. I know that doesn't work out most of the time, though.
I dunno... maybe really strong anti gravity beams?