### Question
What is the definition of motor vehicle?


### Answer
The definition of **motor vehicle** is as follows in *23 U.S.C. § 154*:

> a vehicle driven or drawn by mechanical power and manufactured primarily for use on public highways, but does not include a vehicle operated exclusively on a rail or rails

#### Citation:
  - *23 U.S.C. § 154*
  - Heading: **CHAPTER 1-FEDERAL-AID HIGHWAYS > SUBCHAPTER I-GENERAL PROVISIONS**

