What message does a 'No heavy trucks' sign convey?

A 'No heavy trucks' sign conveys that heavy trucks are prohibited from entering that particular area or roadway. This means that heavy trucks should find an alternative route or detour to avoid the restricted area. Such signs are typically placed in locations where the infrastructure may not be able to support the weight of heavy trucks, ensuring safety and preventing damage to roads, bridges, or other structures.

Light vehicles and other types of traffic may still be allowed; however, the specific message of the sign is focused on heavy trucks, emphasizing the need for those vehicles to divert. The presence of a detour is essential for maintaining traffic flow and protecting various public and private properties.