What is an effective way to assess the effectiveness of a traffic control plan?

Monitoring traffic flow and safety incidents is indeed an effective way to assess the effectiveness of a traffic control plan because it directly measures how well the plan is working in real-world conditions. This approach allows for the evaluation of actual traffic behavior and the safety outcomes that result from the implemented strategies. Analyzing traffic flow can reveal whether the plan facilitates smooth movement for vehicles and pedestrians, while tracking safety incidents provides insight into how well the plan is protecting road users.

In contrast, surveying employee satisfaction may provide useful feedback but doesn't necessarily correlate with the operational effectiveness of the traffic control plan itself. Checking the appearance of traffic control devices, while important for maintaining standards and visibility, also does not measure how well the devices serve their purpose in traffic management. Ignoring feedback from workers overlooks valuable insights that can help improve the plan based on practical frontline experiences. Thus, focusing on traffic flow and safety incidents provides the most comprehensive view of a traffic control plan's effectiveness.