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Questions and Answers About Vehicle Size and Weight

23 CFR 658.15 Width

23 CFR 658.15 Width

What is the minimum/maximum width that States must allow on the National Network?

It is 102 inches or its approximate metric equivalent, 2.6 meters (102.36 inches), except that Hawaii is allowed to keep its 108-inch maximum width limit.

Does a 102-inch wide commercial motor vehicle carrying cargo that extends more than 102-inches in width require an overwidth permit on the NN and reasonable access routes?

Yes. Width limits are primarily safety regulations and would be less effective if cargo was not included.

Does the Federal 102-inch minimum/maximum width limit on the NN apply on non-commercial vehicles, such as recreational vehicles?

No. It applies only on commercial motor vehicles.
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