Usually you won't see the lights til their right behind you, it's hard to be constantly checking every nook and cranny of the road for possible disaters. Just be cautious, check twice, and don't do anything stupid (unless it's controled). Hell, two guys just got in a wreck in our parking with their company trucks, one was backing up into a parking spot, and the other thought he was going striaght foward, rather than backward... hard to explain. The accident was due to not checking what's behind you.