Vehicle Size & Weight

Aerodynamic Device Compliance with 23 CFR 658.16(b) (4)

New 10/15/08 Aerodynamic Device Compliance with 23 CFR 658.16(b) (4) 'Exclusions from Length and Width Determinations' letter of acceptance.

Federal interest in preserving highways goes back to the enactment of the Federal-Aid Highway Act of 1956, which authorized the Interstate and Defense Highway System. To preserve our Nation's infrastructure and to keep trucks and buses moving efficiently, states must ensure that commercial motor vehicles comply with federal size and weight standards. FHWA is responsible for certifying state compliance with Federal standards. This site provides a ready source of information on Federal standards and guidelines, state enforcement activities, reporting requirements, and contacts.

Vehicle Size and Weight Program Overview

Questions and Answers about Vehicle Size and Weight

Vehicle Size & Weight Challenges, Concerns and Future Directions [HTML, PDF - 217KB]

NEED INFORMATION ON OBTAINING AN OVERSIZE OR OVERWEIGHT LOAD MOVEMENT PERMIT? View Federal requirements and get a list of State permitting contacts.

NEED HELP? DID YOU KNOW THAT... FHWA staff in your state are readily available to answer your questions about federal commercial vehicle size and weight standards. View a list of FHWA contacts in your state.

Visit http://www.fhwa.dot.gov/webstate.htm for a list of contacts in state highway agencies, state departments of transportation, state departments of public safety, and other pertinent state agencies.

QUESTIONS on household good movers, brokers or carrier licenses, DOT vehicle numbers, commercial driver licenses, driver physical qualifications, motor vehicle safety or vehicle problems, should be referred to other agencies. View a list of contacts on these issues.