Because of soundproofing, the extensive stereo systems, and the ergonomic design available in most cars manufactured today, the occupants of these vehicles are often less aware of emergency vehicles operating in their immediate vicinity.
Tests show that visual lighting devices have the most significant effect on motorists.
However, most light bars currently in use provide adequate warning to the front and rear of the vehicle, but only minimal warning to the sides. Because the light emanating from the sides of an emergency vehicle approaching an intersection is the most visible source of light to other motorists approaching the same intersection, additional lighting to the sides of each emergency vehicle is critical. This equipment will enhance the visibility of marked patrol cars operating under emergency conditions. Intersection clearance lights consist of a single clear strobe light mounted in the front turn signal housing on both sides of the patrol unit. Equipped with a 35 watt power source mounted in the vehicle, each strobe light blinks three times per second.