Development of Arizona-Specific Safety Performance Functions (SPFs)

The Traffic Safety unit within ADOT’s Transportation Systems Management and Operations Division (TSMO) predicts the estimated number and severity of crashes that can be expected per year for selected roadways using traffic crash data with several other factors such as traffic volume, speed, and road geometry. The practice of estimating crash frequency is essential in managing safety improvements and mitigating transportation safety challenges. This research study will evaluate the quality and usefulness of ADOT's collected data and develop Arizona-specific SPFs for predictive modelling of crashes. The SPFs will reflect different roadway classes and types, including freeway segments, highways, arterials, interchanges, signalized, roundabout and unsignalized intersections, and crossroad ramp terminals.


    • English


    Subject/Index Terms

    Filing Info

    • Accession Number: 01831511
    • Record Type: Research project
    • Source Agency: Arizona Department of Transportation
    • Contract Numbers: SPR-779
    • Files: RIP, STATEDOT
    • Created Date: Dec 22 2021 7:26PM