Mercedes-Benz has just received approval to add a fourth color: turquoise blue lights that indicate when a Mercedes car is driving itself. Only California and Nevada have approved the new light color.

In fact, one of the coolest police cars in America, in Alabama, had only a single blue light on its roof. This is when whether the lights are flashing or solid comes into play.

In the past, seeing blue lights on a car meant the police wanted our attention.Nowadays, some regular cars have headlights that seem to glow with a blue tint. Newer LED headlights glow brighter ...

Mercedes-Benz has just received approval to add a fourth color: turquoise blue lights that indicate when a Mercedes car is driving itself. Only California and Nevada have approved the new light color.