Office of Operations Freight Management and Operations

Freight Facts and Figures 2008

Figure 3-3. Permitted Longer Combination Vehicles on the National Highway System: 2008

Longer Combination Vehicles (LCVs) are tractors pulling a semitrailer longer than 28 feet and a trailer longer than 28 feet, a semitrailer longer than 28 feet and a trailer no more than 28 feet long, or a 28-foot semitrailer and two 28-foot trailers. Although all states allow conventional combinations consisting of a 28-foot semitrailer and a 28-foot trailer, only fourteen states and six state turnpike authorities allow LCVs on at least some parts of their road networks. Allowable routes for LCVs have been frozen since 1991.


Figure 3-3. 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.

[JPEG 316KB, PDF 2.2MB]


Empty trucks are allowed on I-80 in Nebraska.


U.S. Department of Transportation, Federal Highway Administration, Office of Freight Management and Operations, special compilation by the Freight Operations and Technology Team, 2008.



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