Commercial Grain Trade – What are the load restrictions for grain trucks on U.S. highways?

What are the load restrictions for grain trucks on U.S. highways?

The U.S. has federal, state and local (county and city) restrictions and requirements for vehicles that move over roads and bridges. For example, U.S. weight limits for heavy vehicles such as grain trucks on the federal interstate highways are most often 80,000 lbs. of total weight.  Emergency and seasonal weight limits are also often put in place and enforced by Federal, State and Local authorities.  Some states may have higher limits that apply to state roads and highways only.  The best information is most often found by contacting the appropriate authority. Contact information and details on the restrictions that apply can be found online.  For instance:

  1. The U.S. Department of Transportation (USDOT) provides information on freight management and operations including a link to truck size and weight and bridge limits at:
  2. The U.S. DOT also provides a website to locate the Department of Transportation of each state:
  3. The U.S. Department of Transportation website: is organized both by geographic area and by topic. You can click on a State or Province on a map to find information that pertains specifically to Commercial Motor Vehicle (CMV) operations for such items as general motor carrier information, licensing, oversize/overweight permitting, International Fuel Tax Agreement (IFTA) requirements, etc. You also can search by topic using the dropdown box below the map to find available information within that topic for all States and Provinces.
  4. The spreadsheet at:, provides for an interactive database of U.S. weight limitations
  5. Here are examples of U.S. State DOT websites that may be helpful:




North Dakota:


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