An intersection warning system detects forklifts or pedestrians approaching a blind corner, aisle crossing or doorway and shows a light or sign to traffic on the other side.
Intersections combine two hazards: traffic from several directions and no line of sight around the corner. Fixed intersection systems use sensors, such as radar, motion detectors, location tags or cameras, to sense an approaching truck and switch on a light, projected symbol or illuminated sign for whoever is about to cross. Some act like traffic lights, giving one direction priority. OSHA 1910.178 requires drivers to slow down and sound the horn at cross aisles and other places where vision is obstructed; an intersection system supports that rule but does not replace it.
These systems warn; they do not stop anything. They work when people understand the signal and when the sensor sees approaching traffic early enough. Too many activations, for example from a busy walkway, teach people to ignore them. Before buying one, check whether the corner can be redesigned, mirrored or converted to a one-way route. The forklift intersection safety guide covers right-of-way rules and traffic controls.