Your life and those of your passengers are best safeguarded by you assuming that at any moment from either direction, a fast moving, heavily loaded train with pass through any level crossing on your route.
At intersections controlled by traffic lights, you are safest to assume that every driver in every vehicle you see is either impaired by some drug or by their own stupidity. In addition, assume that some fast moving vehicle you don’t currently see could appear as if out of nowhere and enter the intersection.
I mean you no disrespect. I know you want your passengers to be safe whenever they are on or near your bus. I know you want to return safely home after work. I want that too!