If the ones you must use are dimly lighted, complain to the transit company. Wait near other people. Don't isolate yourself. If you are accosted by a stranger, move away. If you are followed, do what you must to draw attention to yourself and the stranger.
Elevators Always look in the elevator before entering.
If you don't feel comfortable entering, wait for another one. Stand near the controls. If attacked in the elevator, push as many floor buttons as you can. If someone suspicious enters, get off. If you are uncomfortable with someone who is waiting for the elevator with you, pretend you forgot something, and leave.