What do Green police lights mean?
Homeland Security vehiclesEssentially they are there to convey the urgency of the situation to oncoming traffic so that they may let the responding vehicle pass.
Their initial popularity came after 9/11 as Homeland Security vehicles became a common sight patrolling the neighborhood with their flashing green lights..
What does it mean when a cop flashes white lights?
If you see a white flashing light, the police may be using it as a warning but are more likely to be trying to identify a particular vehicle or to illuminate your vehicle or one in your vicinity, and you do not need to stop or pull over unless they use their tactical blue and red lights.
What do different color cop lights mean?
When a squad car is flashing a red light, it is signifying that there is an immediate emergency. … Squad cars also use white lights, which are usually used for the night shift when an area needs greater visibility, and yellow lights, which are used to alert other vehicles that a squad car needs to slow down.
What does it mean when a cop has lights but no siren?
Keith recently asked, “Why do I see some emergency vehicles traveling in communities with lights on, but no siren?” … They usually aren’t in contact with heavy traffic and will shut their sirens off to not disturb the community or draw unneeded attention to their situation.”
What color do police lights flash?
Police used to have blue-colored emergency lights but after a recent restock of vehicles, now the use of both blue and red color is usual. Fire Departments make use of red only emergency light while ambulances either use red or both colors.
Why do police cars have flashing lights?
Over time, police cars and other emergency vehicles began to use flashing emergency lights. … In these situations, blue lights really stand out and help to alert other drivers. Others point to studies that indicate that red lights may be more visible during the day, while blue lights may be more visible at night.