What is the minimum required length for temporary sign class A support stubs?

The minimum required length for temporary sign class A support stubs is 42 inches. This specification is grounded in ensuring that the sign stubs provide adequate stability and visibility for temporary signs, which are crucial for maintaining safe and effective traffic control during work zones or road closures.

Temporary signs need to be positioned above the line of sight of drivers to ensure that they are easily seen and understood. A height of 42 inches helps to achieve this visibility while also providing some protection against being knocked over by vehicles or other environmental factors.

Choosing a length that is too short could result in the signs being obscured or not receiving the level of support necessary to withstand varying wind conditions or accidental contact, which would undermine their effectiveness. Thus, the requirement for 42 inches reflects a careful consideration of these safety and functionality concerns within the context of traffic management.