Final answer:
The maximum length allowed for a combination of truck and trailer is determined by state laws, with the Federal Bridge Formula setting a standard of 65 feet on interstate highways. State laws often align with this federal standard, but checking specific state regulations is important. Specialized vehicles may have exceptions with additional regulations and restrictions.
Step-by-step explanation:
In the United States, the maximum length allowed for a combination of truck and trailer is determined by state laws. However, the Federal Bridge Formula sets a standard for interstate highways, limiting the overall length to 65 feet for a combination of truck and trailer. This length can vary depending on the number of axles and the spacing between them. State laws may differ, but they generally align with the federal standards.
For example, in California, the maximum length allowed for a combination of truck and trailer is 65 feet, just like the federal standard. Other states may have similar or slightly different regulations, so it's important to check the specific laws of each state to be certain.
It's worth noting that certain exceptions may exist for specialized vehicles, such as those used in agriculture or for transporting oversized goods. These exceptions often require permits and are subject to additional regulations and restrictions.