What shape are work zone signs typically?

Work zone signs are typically diamond-shaped because this shape is designed to alert drivers to potential hazards and changes in road conditions ahead. The diamond shape stands out to motorists, emphasizing the need for caution. This particular shape effectively conveys that there is a situation that may require drivers to slow down or be more vigilant, as construction or maintenance activities are taking place.

In contrast, square and rectangular signs usually indicate regulatory information or guidance, while circular signs are generally reserved for railroad crossings. The diamond shape is thus a specific visual cue that signals caution and promotes roadway safety in areas where work is being conducted.