Safety Performance Functions for Arkansas

The 2010 Highway Safety Manual (HSM) contains a number of safety performance functions, i.e., equations that predict the expected number of crashes on a roadway segment or intersection of the specified type. The HSM authors suggest that the various safety performance functions presented therein “be calibrated for application in each jurisdiction”. This document reports the methods and outcomes of calibrating the following rural types on the state system to the Arkansas crash database: two-lane segments, four-lane divided segments, intersections on two-lane roads, and intersections on four-lane divided roads. In order to better reflect a truly rural highway environment, the calibration was restricted to locations with speeds of 50 mph or more. For all four types, the actual numbers of crashes in the database were less than those predicted by the HSM equations.


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 64p

Subject/Index Terms

Filing Info

  • Accession Number: 01731905
  • Record Type: Publication
  • Contract Numbers: TRC 15-03
  • Created Date: Feb 26 2020 9:18AM