The US also has 4-way stop signs, where each driver has to remember the arrival of the other vehicles, then move off in the correct sequence. I once also saw a

The US also has 4-way stop signs, where each driver has to remember the arrival of the other vehicles, then move off in the correct sequence. I once also saw a 3-way stop, meaning a 4-road junction, where one road had right-of-way and the others had to do the precedence order. Obviously, this was insanely dangerous - if anyone on the stopping approaches thought it was a 4-way stop, and assumed that all other vehicles would stop, then it would pull out in front of a vehicle that actually had the right-of-way. Then there's right-turn-on-red, which is scary for pedestrians...