What is one of the five basic requirements that traffic control devices must fulfill?

Traffic control devices are essential components in work zone safety, and one of their primary functions is to effectively command the attention of drivers and pedestrians. This requirement is critical because the primary goal of these devices is to ensure safety by clearly communicating important information to users regarding traffic conditions, potential hazards, and necessary actions.

When traffic control devices command attention, they help to reduce confusion and enhance compliance with traffic regulations. For instance, a bright, well-placed traffic sign or signal can quickly alert a driver to an upcoming construction zone, the need to slow down, or changes in traffic patterns. The effectiveness of these devices largely depends on their ability to stand out and be noticed in various driving conditions, such as during the day or night, in adverse weather, and amidst other visual distractions.

In this context, fulfilling the requirement to command attention directly contributes to overall traffic safety, minimizing accidents, and ensuring a smooth flow of vehicles and pedestrians through potentially hazardous areas.