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Road Safety Audit Overview: Enhancing Transportation Safety

Learn about the Road Safety Audit (RSA) process, benefits, and applications in Region 1 in this informative presentation. Understand how RSAs improve safety by examining road elements and considering mitigation measures.

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Road Safety Audit Overview: Enhancing Transportation Safety

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  1. March 20, 2011 Presented by: Sue D’Agnese, Region 1 Traffic Manager OR210 Scholls Ferry Rd: Cascade Ave to OR 217 SB Off-ramp Road Safety Audit – Kick off Meeting Overview of: ROAD SAFETY AUDIT (RSA) PROCESS & APPLICATIONS

  2. Presentation Outline • What is a Road Safety Audit (RSA)? • Overview of Federal Highway Administration (FHWA) RSA Process • RSA Projects in Region 1 • Mt. Hood Highway RSA • US 30 Safety Corridor • Hwy 212 @ Dubarko • TV Hwy @185th • Mt Hood Hwy Timberline- Meadows • Benefits of RSAs

  3. What is a Road Safety Audit? A road safety audit is a formalsafety performance examination of an existing or future road or intersection by an independentmulti-disciplinedaudit team.

  4. What is a Road Safety Audit?

  5. A road safety audit also… • Considers the safety of all road users • Examines the interaction of project elements • Considers interactions at the borders or limits of the project • Proactively considers mitigation measures

  6. A road safety audit is NOT…. … a standards check, examining adherence to design guidelines. … a backdoor to redesign the project.

  7. What is a Road Safety Audit? A road safety audit seeks to identify opportunities to improve safety

  8. FHWA RSA Process

  9. RSA Process – 2 Pre-Audit Meetings

  10. Pre-AuditMeeting: RSA Start up Meeting Presentation of Data to RSA Team by RSA Team Facilitator • Detailed Drawings • Key Resource member’s data and input • Key Stakeholder input • Aerial photographs • Background reports • Design criteria • Collision history • Detailed crash analysis • Traffic volumes • Project design elements • Project design constraints

  11. Pre-Audit Meeting: Kick Off Meeting Meeting with Project Owner and RSA team to provide goals of the RSA • Define the RSA process • Drawings and Aerials • Background reports • Design criteria • Collision history • Traffic volumes • Project objectives (owner) • Why is RSA being conducted? • Project design elements • Project design constraints (owner)

  12. RSA Process – Field Review

  13. Field Review • Observe road user characteristics • Observe surrounding land uses • Observe link points to the adjacent transportation network • Look for: • driveway issues • roadside hazards • sight distance obstructions • Anything impacting safety

  14. Field Review • Consider all users • Consider driver behavior • Drive the site • Drive all approaches • Make all turns • Walk/bike the project area • Take notes • Take lots of photos

  15. Field Review Observe conditions during: • peak and off-peak traffic periods • dry and wet weather conditions • day and night conditions

  16. RSA Process – RSA Analysis

  17. RSA Analysis: Conducting the RSA • Workshop setting • Review background reports, crash data, and design criteria • Systematically review design drawings and/or other information • Identify, prioritize, and mitigate safety issues

  18. Risk Analysis For each issue: • What potential exists for crashes? • What is the likelihood of crashes? • How severe are the crashes likely to be? • Crash potential? • What exposure exists • Likelihood of a crash? • What probability exists • How severe? • What consequences? Risk = f (Exposure, Probability, Consequences)

  19. RSA Process – Presentation of Findings

  20. Presentation of Findings: RSA Presentation and Report • Documents the results of the RSA • Identifies and prioritizes safety issues • May include suggestions for improvements

  21. Benefits of an RSA • Consensus on the problems • Focus for project development teams • Looked at safety improvements that we might not have otherwise identified • Reality check on some design items • All alternatives and safety trade-offs are prioritized • Low cost improvements identified • Improved transportation safety for all users

  22. Thank You – Any Questions?

  23. OR210 Scholls Ferry Rd: Cascade Ave to OR 217 SB Off-ramp RSA

  24. OR 217 Cascade Ave OR210 Scholls Ferry Rd

  25. RSA Schedule

  26. OR210 Scholls Ferry Rd: Cascade Ave to OR 217 SB Off-ramp Crash Graphs • January 2006 – July 2011 • Peak 2009-2010 • 52% Rear-ends/SS-O • 44% Angle/Turn • 0 Pedestrian crashes Peak hours 3pm-6pm

  27. OR210 Scholls Ferry Rd: Cascade Ave to OR 217 SB Off-ramp RSACrash Graphs • 27% Dark crashes (Lit and Unlit) • Spikes at Cascade Ave (mp 9.06) and OR217 SB Off-ramp (mp 9.13)

  28. TV Hwy at SW 185th – Road Safety Audit

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