### Question
How does the law define average impaired driving fatality rate?


### Answer
Under *23 U.S.C. § 405*, **average impaired driving fatality rate** is defined as:

> the number of fatalities in motor vehicle crashes involving a driver with a blood alcohol concentration of at least 0.08 percent for every 100,000,000 vehicle miles traveled, based on the most recently reported 3 calendar years of final data from the Fatality Analysis Reporting System, as calculated in accordance with regulations prescribed by the Administrator of the National Highway Traffic Safety Administration

#### Citation:
  - *23 U.S.C. § 405*
  - Heading: **CHAPTER 4-HIGHWAY SAFETY**

