### Question
How does AID HIGHWAYS define systemic safety improvement?


### Answer
Under *23 U.S.C. § 148*, **systemic safety improvement** is defined as:

> an improvement that is widely implemented based on high-risk roadway features that are correlated with particular crash types, rather than crash frequency

#### Citation:
  - *23 U.S.C. § 148*
  - Heading: **CHAPTER 1-FEDERAL-AID HIGHWAYS**

