### Question
Can you define what maintenance means?


### Answer
**Maintenance** is defined as the following in *23 U.S.C. § 101*:

> the preservation of the entire highway, including surface, shoulders, roadsides, structures, and such traffic-control devices as are necessary for safe and efficient utilization of the highway

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

