### Question
What is the definition of maintenance?


### Answer
The definition of **maintenance** is as follows 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 its safe and efficient utilization

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

