Presentation Transcript

1. HSM Practitioner’s Guide for Two-Lane Rural Highways Workshop Course Instructors F. E. (Gene) Amparano, PE FHWA Resource Center Kansa City, MO gene.amparano@dot.gov David Engstrom, PE FHWA Resource Center Matteson, IL david.engstrom@dot.gov
2. What is the HSM? A tool to improve safety analyses Encourages a “science-based” technical approach to safety analysis Reduces the guesswork Quantitative analyses allow safety to be evaluated alongside other transportation performance measures (capacity, environmental, ROW, and construction costs)
3. Why Do We Need the HSM? Need Integrate Safety into Project Decision Processes
4. We’re Interested in Other Impacts for Project Level Decisions – What About Substantive Safety? Common Impacts for Project Level Decisions? Construction Plans Cost Models Real estate appraisals DOT databases CORSIM HCM PASSER TRANSYT7F VISSIM Design Criteria (nominal safety) Traffic Noise Model 1.0 CAL3QHC Mobile 5a 3-D Visualization CITYGREEN More quantitative Greater weight The HSM Safety Environmental Traffic Right-of-Way Costs Impacts Impacts Operations
5. FHWA Safety Focus Areas Data Comparison Fatalities are expressed as annual averages
6. AHTD – Strategic Highway Safety Plan “Arkansas continues to have one of the highest fatality rates in the nation (1.79 in 2009)… One factor that contributes to the State’s high fatality rate is that 85 percent of the State’s road system is made up of rural, two-lane roads. Many of these roads have narrow or no shoulders that can contribute to run-off-road crashes. The majority of fatal crashes result in a vehicle leaving the roadway and striking a fixed object and/or overturning.”