What class of supports should be used on all temporary sign supports that are unprotected?

The use of Class A supports for unprotected temporary signs is emphasized due to their lightweight and flexible design, which is crucial in minimizing the risk of injury in the event of a collision. Class A supports are designed to bend or yield upon impact, promoting safety for both motorists and pedestrians. The choice of these supports is particularly important in temporary traffic control scenarios where signs may be exposed to traffic conditions, and the potential for accidents is heightened. This safety-centric approach aligns with best practices in traffic management, ensuring that while signs are visible and informative, they do not pose unnecessary hazards.

Other classes of supports might not provide the same level of safety features, making them unsuitable for environments where unprotected signs could endanger road users. Thus, opting for Class A supports ensures compliance with safety standards in Maintenance of Traffic (MOT) practices, effectively balancing visibility requirements with the need to protect individuals from potential impacts.