### Question
What does incident mean?


### Answer
**Incident** has the following meaning in *23 U.S.C. § 501*:

> a crash, natural disaster, workzone activity, special event, or other emergency road user occurrence that adversely affects or impedes the normal flow of traffic

#### Citation:
  - *23 U.S.C. § 501*
  - Heading: **CHAPTER 5-RESEARCH, TECHNOLOGY, AND EDUCATION**

