What color emergency lights do private vehicles of law enforcement officers use?

In New Hampshire, private vehicles of law enforcement officers are allowed to use red and blue emergency lights. This color combination is specifically associated with law enforcement to differentiate their vehicles from those of other emergency responders, such as fire services (which may use red) and ambulances (which may use a combination of colors).

The use of red and blue lights serves important functions, such as signaling to other drivers to yield the right-of-way, indicating the presence of an authority figure, and helping to ensure safety during traffic stops or emergency situations. Red lights are typically used to capture attention quickly, while blue lights can enhance visibility, particularly at night.

Other color combinations, like amber or green, are typically designated for different purposes or types of vehicles. For example, amber lights are commonly used by maintenance vehicles or tow trucks. Green lights may be used by volunteer emergency personnel but are not standard for law enforcement officers. Thus, the combination of red and blue is unique to law enforcement, reinforcing their authority and presence on the road.