What requirements must barricades, warning signs, and other signaling devices meet?

Barricades, warning signs, and other signaling devices are essential components for ensuring safety in construction and work zones. The correct answer indicates that these devices must meet or exceed local Department of Transportation (DOT) requirements. This is because local DOT regulations are specifically tailored to manage traffic and ensure safety in a given geographic area, factoring in the unique conditions and challenges of that location.

By adhering to both local standards and potentially exceeding them, contractors can ensure that their safety measures are effective and compliant with the expectations set by local authorities. Furthermore, local DOT requirements often incorporate best practices from federal regulations, making them critical for on-the-ground safety implementation.

In contrast, local construction site requirements alone may not encompass all safety aspects related to traffic control and public safety. Relying solely on federal regulations could result in inadequate safety practices that do not address specific local needs or conditions. Thus, meeting or exceeding local DOT requirements provides a more comprehensive approach to safety in work zones.