What do yellow lights mean on a cop car?
What do yellow lights mean on a cop car? Red lights signify an immediate emergency. Blue lights define police presence and can be spotted easily from a great distance. Yellow lights warn approaching vehicles that patrol cars are slowing down or parked on busy roads. All lights may be used at the same time. What does a red light on the dash mean? In general, a red dash light indicates a warning and something that requires you attention, an orange / amber light suggests an advisory issue that you should be aware of but not necessarily take immediate action and...