Intersection Safety Performance Function Calibration Factors for Project Planning and Design

Virginia Department of Transportation (VDOT) uses the Highway Safety Manual (HSM) predictive methods to anticipate the safety performance of new intersection designs, assess the safety performance of existing intersections/corridors, or estimate the expected effectiveness of proposed improvements to existing intersections/corridors. The HSM is being updated to incorporate new models and research completed since the first edition of the manual, including safety performance functions (SPFs) for new configurations and traffic control types based on the results of NCHRP 17-68 Intersection Crash Prediction Methods for the HSM 2 and NCHRP 17-70 Development of Roundabout Crash Prediction Models and Methods. These SPFs need to be calibrated to Virginia conditions to ensure that they accurately reflect the driver population and environment. The purpose of this project is to conduct systematic calibration of the new intersection SPFs to be included in the 2nd HSM edition. The application of uncalibrated SPFs may produce misleading results, compromise safety outcomes, and lead to inappropriate design decisions.

Language

• English

Project

• Status: Active
• Funding: $168976
• Contract Numbers:

  124329

• Sponsor Organizations:

  Virginia Transportation Research Council

  530 Edgemont Road
  Charlottesville, VA  United States  22903
• Performing Organizations:

  Virginia Transportation Research Council

  530 Edgemont Road
  Charlottesville, VA  United States  22903
• Principal Investigators:

  Appiah, Justice

• Start Date: 20231201
• Expected Completion Date: 20251130
• Actual Completion Date: 0

Subject/Index Terms

• TRT Terms: Calibration; Intersections
• Identifier Terms: Highway Safety Manual; Safety Performance Functions
• Geographic Terms: Virginia
• Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; Safety and Human Factors;

Filing Info

• Accession Number: 01899794
• Record Type: Research project
• Source Agency: Virginia Department of Transportation
• Contract Numbers: 124329
• Files: RIP, STATEDOT
• Created Date: Nov 18 2023 8:07AM