Sorry to drive off the exact topic. But some other perhaps less popular traffic concerns are out there as well. Like how the left turn signal is perceived in Mexico. This may not be a problem for Mexicans who grew up with how this is done, but for others driving in their country it requires thought. While following someone, especially a slow truck, if you see the left start blinking on the truck, they are either signalling you to pass, or signalling that they plan to make a left turn. In city driving, and wanting to turn left, I've been advised use you blinker and to put your arm out the window and point out this next move...and watch that the vehicle behind is not attempting to pass you.
A recent trip from east to west of driving in the US made me realize that I had never seen the flashing amber lights that get placed prominently, so that approaching vehicles can know that a red light stop, is ahead. These lights are in use liberally, across Canada. They save on brakes and contribute to road safety, with a realization that intersections are often where accidents take place.
