Fire trucks usually have red and white lights to get our attention. And police cars have red and blue lights. But why do police cars have red and blue lights? Why not red and purple, or another ...

The use of blue lights by police forces has a historical context that dates back several decades. Initially, police vehicles used red lights, which were later supplemented with blue lights to ...

Police cars have various lights they use to communicate with others on the road, but at times it can be hard to tell what exactly they're conveying. Red and blue flashing lights are standard and ...

Virginia State Police are releasing new cars which have new lights on the top of the car that include both red and blue flashing lights.Ronald Gibbons and his team of VTTI researchers conducted ...

IDAHO FALLS, Idaho (KIFI) - Idaho drivers may be familiar with the flashing red and blue lights ... All Idaho state police officers are adopting white and blue lights after new research found ...

(WHTM) — Emergency vehicles have a multitude of ways to get our attention, including flashing lights, horns and sirens. But why do police cars use red and blue lights? Why not red and purple ...