How often should traffic control devices be inspected?

Traffic control devices should be inspected daily or before the start of operations to ensure they are correctly positioned, functioning properly, and compliant with safety regulations. This frequency of inspection is critical for maintaining the safety and efficiency of traffic management. Daily checks help to identify any damage, wear, or changes in conditions that could affect the visibility or effectiveness of the devices. For instance, environmental factors such as weather conditions or construction activities can impact how traffic control devices perform, making it essential to confirm their operational status before they are needed each day.

While other options may suggest reasonable intervals for checks, they do not address the immediate need for verification that arises with daily traffic fluctuations and operational changes. Regular daily inspections are integral to achieving optimal traffic safety and flow, thereby making this the correct answer.