Office of Operations Freight Management and Operations

Permitted Longer Combination Vehicles on the National Highway System: 2011 Map

U.S. map showing that longer combination vehicles are allowed from Chicago to the Pennsylvania-Ohio border on I-80, the New York State Thruway and the Massachusetts Turnpike, the Florida Turnpike, the Kansas Turnpike, Interstate highways in eastern Colorado, and many routes in Oklahoma, Utah, Nevada, the Dakotas, Montana, Wyoming, Idaho, Oregon, and Washington.

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Empty triples are allowed on I-80 in Nebraska. NHS mileage as of 2011, prior to MAP-21 system expansion.


U.S. Department of Transportation, Federal Highway Administration, Office of Freight Management and Operations, 2013.

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