What types of devices can signal traffic to stop in a construction zone?

Using stop/slow paddles and illuminated signals in a construction zone is an effective way to control traffic and ensure safety. Stop/slow paddles are widely recognized and easily understood by drivers, making them a standard tool for flaggers and traffic control. These paddles typically consist of a bright red "STOP" side and a yellow "SLOW" side, providing clear instructions for drivers based on the traffic conditions.

Illuminated signals add an additional layer of visibility, especially in low-light conditions or poor weather. These electronic devices can flash to attract attention and communicate the need for vehicles to stop or proceed slowly. Together, they create a robust system for managing traffic in construction zones and protecting both workers and drivers.

While cones can indicate construction zones, they do not actively signal vehicles to stop or slow down as effectively as paddles and illuminated signals do. Similarly, flags and verbal instructions can be useful, but they may not be as universally recognized and could be less effective in adverse conditions or at greater distances. Overall, using stop/slow paddles and illuminated signals offers a standardized approach that enhances safety and clarity for all road users in construction zones.