What color warning lights must private security vehicles use?

Private security vehicles are required to use amber warning lights in many jurisdictions, including New Hampshire. The use of amber lights is specifically designed to alert other drivers to a slower-moving or stationary vehicle on the road, thereby enhancing safety and visibility. Amber lights are commonly associated with non-emergency vehicles, indicating caution without implying an immediate emergency situation as red or blue lights would.

In contrast, red lights typically signify emergency response vehicles like police cars and ambulances, while blue lights are often associated with law enforcement. Green lights are sometimes used for volunteer fire or EMS personnel but are not standard in security situations. Therefore, the requirement for private security vehicles to utilize amber warning lights is aligned with safety protocols designed to ensure they are visible to other drivers while performing their duties.