What is the typical mounting height for traffic signals above the roadway?

The typical mounting height for traffic signals above the roadway is generally set at approximately 15 to 20 feet. This height range is established to ensure optimal visibility for drivers while maintaining safety and functionality for signal operation. Signals mounted too low may not be clearly visible to all vehicles, especially larger trucks or for those at intersections with a variety of sightlines. On the other hand, mounting signals too high would reduce visibility for motorists, especially pedestrians and cyclists who may not be eye-level with the signal. Thus, the 15 to 20 feet height range offers a balance that provides good visibility and accessibility for all road users, making it the preferred standard in traffic signal design.