How high must temporary signs be mounted above the traveled way?

The appropriate height for temporary signs mounted above the traveled way is usually specified for safety and visibility. The correct choice indicates that temporary signs should be mounted at least 1 foot above the traveled way. This height is typically sufficient to ensure that the signs are visible to drivers without obstructing the line of sight or posing hazards.

Mounting signs at this height helps to avoid interference with vehicle operations and maintains clarity for road users, thereby supporting effective traffic management and safety. It’s recognized in various regulatory guidelines that signs positioned at a minimum of 1 foot above the traveled way can fulfill visibility requirements while being low enough to be seen without obstruction by typical vehicles.

Other height options may not provide optimal visibility or could potentially impair a driver's view, thus increasing safety risks. The established height ensures that temporary signs communicate their messages clearly and effectively to all road users.