For cranes designed for travel on public roads, they must comply with what regulations?

Cranes that are designed for travel on public roads must comply with federal transportation regulations. This requirement is essential because these cranes are treated as vehicles when they are on public roads, meaning they need to follow the same rules and regulations that govern other types of motor vehicles. This includes regulations about weight limits, dimensions, and safety equipment to ensure safe operation on highways and roads.

In the context of the other options: local building codes typically govern construction practices and standards in a specific area but do not address the transportation aspects of cranes. Safety health codes are generally more focused on workplace safety standards rather than road transportation. Environmental guidelines deal with issues related to environmental protection and do not directly apply to the operational compliance of cranes on public roads. Thus, the most relevant regulatory framework for cranes on public roads is the federal transportation regulations.