The AAA Digest of Motor Laws is an online compendium of laws and rules related to driving and owning a motor vehicle in the United States and Canada.


    AAMVA Provides a wealth of informational resources and products for both our members and the general public. From portfolios on a variety of issues, to publications and network services, AAMVA is your resource for information on the motor vehicle community and its operations.

    Federal Highway Administration Truck Size and Weight

    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.

    Flordia Regulations

    This manual serves as a guide for commercial motor vehicle drivers who transport goods and passengers in Florida. This guide lists size and load limits, safety rules, and permits required by the State of Florida.

    Heavy Haul

    Our informative articles provide discussion on equipment that is useful as a reference for employees, drivers, customers, and anyone wanting information about oversize and heavy haul trucking.

    Heavy Haul Regulations

    The Federal government does not issue permits for heavy haul, oversize or overweight shipments. Each individual state is required to maintain their own set of state regulations.  They also issue special trucking permits on a case by case basis. If you need to research state regulations or law for oversize and over-weight shipping limitations or need general information about the limits and restrictions of these regulations simply click on the desired state or providence for more information.

    Indiana Size and Weight Regulations

    Summary of Indiana Size and Weight Laws under TITLE 9 Article 20

    Mississippi Department of Transportation

    For the latest on Mississippi roadways, laws and regulations.


    This Vehicle Standards Information (VSI) No. 5 is intended to provide information on the dimension limits that apply to vehicles registered for use on NSW roads and road-related areas.

    Navada Traffic Laws for Size, Weight and Load

    This handbook contains extracts of the traffic laws pertaining vehicle size, weight and load requirements in Nevada. There are other NRS and NAC chapters and sections that address the multitude of other traffic laws pertaining to commercial vehicles and trucks. These laws are revised on a recurring basis, and revisions to NAC 484 and 706 are scheduled for September 2012 and to NRS 484 and 706are planned for introduction in the 2013 Legislature. Therefore, this handbook will be obsolete in the near future, and should be destroyed and replaced when a more current version is posted on the NDOT web site.