Even in the US, there are large regional differences. In my part of the US, people use their turns signals probably 80-90% of the time, but I've been in several

Even in the US, there are large regional differences. In my part of the US, people use their turns signals probably 80-90% of the time, but I've been in several parts of the US where they don't. OTOH, there are other bad driving habits that more common where I am than in many other places, such as running red lights.