Although all states allow the conventional combinations consisting of two 28-foot semi-trailers, only 14 states and six state turnpike authorities allow longer combination vehicles (LCVs) on some parts of their road networks. LCVs are tractors pulling a semi-trailer and trailer, with at least one—the semi-trailer, the trailer, or both—longer than 28 feet. The routes that these LCVs can travel have not changed since 1991.
Routes Where Longer Combination Vehicles Are Permitted, 2014
Note: Empty triples are allowed on I-80 in Nebraska.
|States or State Turnpike Authorities that Allow LCVs on Selected Routes|
|Florida Turnpike Authority||Nebraska|
|Indiana Turnpike Authority||New York Turnpike Authority|
|Kansas Turnpike Authority||North Dakota|
|Massachusetts Turnpike Authority||South Dakota|
|Ohio Turnpike Authority||Wyoming|