While police vehicles have red and blue lights, ambulances and fire engines only have red lights.
This lighting is called emergency vehicle lighting.
It can also be used to make other drivers aware of a hazard when stationary.
Emergency vehicles often have flashing headlights to augment the emergency lights.
What do the different police lights mean?
Light bars have at least two colors. 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 red flashing police lights mean?
A motorist’s normal reaction to seeing blue flashing lights. immediately in front of him is to stop and let the police car pass. The red. flashing lights signify “I have stopped, so you need to pass me”.
What do the different color emergency lights mean?
The most common colors used on emergency vehicles are red, blue, amber or yellow, white, green, and purple. For instance, red forward-facing lights almost always indicate an emergency vehicle – usually fire or ambulance – but can be used in specific ways by hearses, tow trucks, or police as well.
What does it mean if a police car flashes you?
Flashing can warn other drivers of road dangers, such as crashed cars or police speed traps. Flashing can be used to give thanks. Headlight flashing may constitute aggressive driving, and can be used in an attempt to intimidate others into speeding or otherwise driving unsafely.