And police cars have red and blue lights. (WHTM) — Emergency vehicles have a multitude of ways to get our attention while driving; flashing lights, horns, and sirens.

HOUSTON (CW39) – The sight of blue police lights is a common yet powerful symbol in modern society. These lights are not only a tool for law enforcement but also serve as an important signal to ...

Red and blue flashing lights are standard and we know that signifies an emergency, but if a police car has flashing yellow lights, for example, it means something else entirely.

HOUSTON (CW39) – The sight of blue police lights is a common yet powerful symbol in modern society. These lights are not only a tool for law enforcement but also serve as an important signal to ...

Red and blue lights are used on U.S. police cars for many reasons, but the main one is that they are highly visible and easily distinguishable from one another.

Red and blue lights are used on U.S. police cars for many reasons, but the main one is that they are highly visible and easily distinguishable from one another.