Freeway Segment Safety Performance Function (SPF) Development
Ohio is currently using calibrated national Safety Performance Functions for all the site types in AASHTO's Highway Safety Manual (HSM) to make them specific for Ohio. However, the calibrated freeway segment SPFs appear to be performing poorly when estimating peer group and long term average crash frequencies. The freeway SPFs used for predicted and expected crash frequencies need to be refined to increase the accuracy. The goal of this research is to increase reliability of crash estimation on freeway segments.
Project
- Status: Active
- Funding: $224570
-
Contract Numbers:
33808
109462
135971
-
Sponsor Organizations:
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC United States 20590 -
Managing Organizations:
Ohio Department of Transportation
Research Program
1980 West Broad Street
Columbus, OH United States 43223 -
Project Managers:
Nye, Kelly
-
Performing Organizations:
Vanasse Hangen Brustlin, Incorporated
333 Fayetteville Street, Suite 1450
Raleigh, NC United States 27601 -
Principal Investigators:
Himes, Scott
- Start Date: 20191101
- Expected Completion Date: 20210630
- Actual Completion Date: 0
Subject/Index Terms
- TRT Terms: Accuracy; Calibration; Crash rates; Estimating; Freeways
- Identifier Terms: Highway Safety Manual; Safety Performance Functions
- Geographic Terms: Ohio
- Subject Areas: Highways; Planning and Forecasting; Safety and Human Factors;
Filing Info
- Accession Number: 01720764
- Record Type: Research project
- Source Agency: Ohio Department of Transportation
- Contract Numbers: 33808, 109462, 135971
- Files: RiP, STATEDOT
- Created Date: Oct 28 2019 3:03PM