What is required on all vehicles inside the work zone?

High-intensity rotating or strobe lights are essential for all vehicles within a work zone because they enhance visibility and alert other road users about the presence of construction activity. These lights provide a clear signal that the vehicle is operating in an environment where safety is paramount, creating a buffer between the work being conducted and the flow of traffic. This added visibility is crucial, especially in low-light conditions or adverse weather, to reduce the risk of accidents.

In contrast, while standard reflective tape, side mirrors, and lightweight safety cones can contribute to safety, they do not provide the same level of immediate and dynamic visibility that high-intensity lights do. Reflective tape on vehicles is generally used for visibility but doesn't actively signal movement or presence as effectively as strobe lights. Side mirrors are important for the driver's visibility of surrounding traffic but do not help in alerting others about the vehicle's location in a work zone. Lastly, lightweight safety cones are typically placed to delineate traffic lanes or hazardous areas rather than being a feature of vehicles themselves.