### Question
How is the term longer combination vehicle defined?


### Answer
The term **longer combination vehicle** is defined in *23 U.S.C. § 127* as the following:

> any combination of a truck tractor and 2 or more trailers or semitrailers which operates on the Interstate System at a gross vehicle weight greater than 80,000 pounds

#### Citation:
  - *23 U.S.C. § 127*
  - Heading: **CHAPTER 1-FEDERAL-AID HIGHWAYS > SUBCHAPTER I-GENERAL PROVISIONS**

