Continuous Friction Measurement Equipment As a Tool for Improving Crash Rate Prediction Kevin Wright.

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Presentation transcript:

Continuous Friction Measurement Equipment As a Tool for Improving Crash Rate Prediction Kevin Wright

Researchers Kevin McGhee – VTRC Associate Principal Research Scientist Dr. Edgar De Leon Izeppi – VTTI Dr. Samer Katicha - VTTI Dr. Gerardo Flintsch - VTTI Ross McCarthy - VTTI

Project Genesis Pavement Friction Management FHWA Technical Advisory 5040.38 Pavement Friction Management Recommended the use of continuous friction measuring equipment (CFME) Contrast CFME against traditional systems

Research Performed District level pilot 2000 lane miles Linked friction data to crash data Performed economic analysis

Research Results A network analysis of friction-related crashes can effectively incorporate all crash types, not just wet crashes CFME accommodates coupling of crash data with pavement friction data Pavement friction and curve data can be incorporated into standard safety performance functions (SPFs) The total economic savings through friction enhancement can be considerable

Research Recommendations CFME use should be expanded to monitor pavement skid resistance Pavement friction should be incorporated in SPFs Additional work to use macro-texture and geometrics to improve crash rate estimates Use improved SPFs to evaluate and recommend treatment options

Implementation Status Collecting continuous data on Interstate highway system (1,100 miles) Using FHWA’s Sideway-Force Coefficient Routine Investigation Machine (SCRIM)

Case Study I-81 MM 167-169 Problem section Reduction of 8-12 crashes per year Savings of up to $2.3 million

Value Decreased: Crashes Property Damage Injuries Deaths Research Costs - $175K + $200K

Thank You! For more information: Kevin.McGhee@VDOT.Virginia.gov