What device alerts drivers to dangerous conditions at some intersections?

A flashing signal is designed to alert drivers to potentially dangerous conditions at specific intersections. These signals typically operate differently than standard traffic lights; they utilize blinking lights to capture a driver's attention and indicate that they should proceed with caution. The use of a flashing signal suggests that there may be hazards, such as pedestrian crossings, school zones, or intersections with a high accident rate, requiring increased vigilance from drivers.

Flashing signals can be particularly effective in reducing accidents by ensuring that drivers are more aware of their surroundings compared to standard steady traffic lights. Instead of providing the usual go-stop directive, the blinking light conveys urgency and encourages drivers to slow down and be prepared to react accordingly. This distinction is particularly important in locations where unexpected situations may arise.

In contrast, solid traffic lights and warning signs serve different purposes. Solid traffic lights direct traffic flow without indicating immediate danger, and warning signs provide specific information about upcoming hazards but do not actively signal drivers in real-time. A pedestrian signal serves to inform pedestrians of their right of way but does not alert drivers to road conditions directly. Thus, a flashing signal serves a unique role in enhancing driver awareness at intersections where caution is critical.