Office of Operations Freight Management and Operations

Freight Facts and Figures 2010

Figure 3-4. Permitted Longer Combination Vehicles on the National Highway System: 2009

Longer combination vehicles (LCVs) are tractors pulling 1) a semitrailer longer than 28 feet and a trailer longer than 28 feet, 2) a semitrailer longer than 28 feet and a trailer no more than 28 feet, or 3) 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 14 states and 6 state turnpike authorities allow LCVs on at least some parts of their road networks. Allowable routes for LCVs have been frozen since 1991.


Figure 3-4. U.S. map showing routes for combination trucks longer than 60 feet. Note: Empty triples are allowed on I-80 in Nebraska.

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U.S. Department of Transportation, Federal Highway Administration, Office of Freight Management and Operations, special compilation by the Freight Operations and Technology Team, 2010.


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