### Question
How does the law define motor vehicle?


### Answer
Under *23 U.S.C. § 164*, **motor vehicle** is defined as:

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

#### Citation:
  - *23 U.S.C. § 164*
  - Heading: **CHAPTER 1-FEDERAL-AID HIGHWAYS**

