High Friction Surface Treatment for High Crash Locations: Phase 2: Performance Assessment

This proposed effort is designed to build on the work completed in Phase 1. In Phase 1 of High Friction Surface Treatment (HFST) for High Crash Locations, a methodology was developed to systematically identify potential HFST candidate, mainline horizontal curves on primary and secondary roads based on crash experience. Through an iterative review process with the Iowa Department of Transportation (Iowa DOT) Office of Traffic and Safety, and input from appropriate highway agencies (county and Iowa DOT), fourteen total curves were identified for HFST treatment in 2017. After working with all agencies involved, nine (9) sites received the high friction surface treatment in the summer of 2017. The objective of this project is to establish a baseline condition for all treatment sites and monitor HFST performance and basic driver behavior for a three year period following treatment. Crash data from before and after will also be collected. Tasks include: (Task 1) Collect Treatment Site Base line Roadway, Roadside and Traffic Characteristics; (Task 2) Collect Other Pertinent Treatment Site Characteristics; (Task 3) Document HFST Details; (Task 4) Monitor Treatment Site Characteristics; (Task 5) Analyze HFTS Performance; and (Task 6) Prepare final report. A final report will be prepared documenting the data collection protocols, HFTS treatment site characteristics before and during the analysis period and resulting HFTS performance at individual and collective sites. Comparisons may be made to previously documented results of similar applications in other states. Recommendations may be made regarding possible modifications in site identification, design and data collection, including those characteristics monitored and corresponding collection protocols.