What is the primary color of signs in highway work zones?

The primary color of signs in highway work zones is orange. This color is specifically used to alert drivers to construction and maintenance activities that may be taking place on or near the roadway. Orange conveys a sense of caution and is associated with safety, signaling that drivers need to be alert for potential hazards, changes in traffic patterns, or reduced speed limits.

Using orange for work zone signs helps to grab the attention of drivers and indicates the need for heightened awareness while navigating through potentially dangerous conditions. Additionally, this color stands out against other environmental elements, ensuring that the signs can be easily seen and understood even in tough weather conditions or low light situations. Thus, the use of orange is not only a standard practice in traffic management but also a vital safety measure for both drivers and construction workers.