What color flashing lights are used by police cars?

Police cars typically use blue flashing lights as a primary means of signaling their presence to alert motorists and pedestrians. The use of blue is standardized in many jurisdictions, as it is distinct from the colors used by other emergency vehicles. This helps create a clear distinction between police vehicles and others, ensuring that drivers recognize the presence of law enforcement and can respond appropriately.

While other colors are used for different types of vehicles—such as red for fire trucks and ambulances—blue is specifically associated with police. This color combination is also meant to enhance visibility, especially in low-light conditions, making it easier for individuals to notice the police and follow safety protocols, such as pulling over or yielding the right-of-way.

The other colors listed are used in various contexts but are not representative of police emergency vehicles. Red, while commonly associated with emergency services, is primarily used by fire departments in many areas. Green light typically denotes volunteer firefighters or specific roles, and amber lights are often used for maintenance or roadside service vehicles, which helps differentiate these from law enforcement activities. This color coding is essential for public safety and helps maintain order on the roads.