### Question
Can you define what Federal-aid system means?


### Answer
**Federal-aid system** is defined as the following in *23 U.S.C. § 101*:

> any one of the Federal-aid highway systems described in section 103 of this title

#### Citation:
  - *23 U.S.C. § 101*
  - Heading: **CHAPTER 1-FEDERAL-AID HIGHWAYS**

