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SafetyAnalyst Overview Presentation

SafetyAnalyst Overview Presentation. Michael S. Griffith FHWA June 2003. Creative Destruction.

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SafetyAnalyst Overview Presentation

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  1. SafetyAnalystOverview Presentation Michael S. Griffith FHWA June 2003

  2. Creative Destruction • “The stock market, like the economy, follows an incessant path of creative destruction. New technology, processes, and products continually supplant the old and tired in a capitalist system. New market leaders always challenge the old guard.” (Investor’s Business Daily, June 2, 2003)

  3. What is SafetyAnalyst? Vision Statement • Provide state-of-the-art analytical tools for use in the decision making process to identify and manage a systemwide program of site-specific improvements to enhance highway safety by cost-effective means

  4. Why is SafetyAnalystBeing Developed? • Both FHWA and participating state highway agencies have perceived a need to improve the analytical tools available to highway agencies for safety management of the highway system

  5. Participating States

  6. Who is DevelopingSafetyAnalyst? • Federal Highway Administration • Technical Working Group, 13 participating states • Midwest Research Institute and subcontractors • ITT Industries, Software development contractor

  7. Tools for Safety Management • To assist agencies in making better decisions about: • Where to make highway safety improvements • Determining what improvements to make • Evaluating the effectiveness of implemented safety improvements

  8. Scope • Addresses site-specific improvements based on site-specific needs, not general programs like vehicle design improvements, occupant restraints, etc. • Uses state-of-the-art technology to advance the state of the practice • Should be comprehensive – including all stages of the safety management process

  9. What Tools will be Available in SafetyAnalyst? • Network screening to identify sites with promise for safety improvement • Diagnosis of safety concerns • Selection of countermeasures • Economic appraisal of countermeasures • Priority ranking of countermeasures • Evaluation of implemented projects

  10. Target Audience Professionals involved in deciding: • Where to make highway safety improvements • Determining what improvements to make • Evaluating the effectiveness of implemented safety improvements

  11. Modules • 6 tools are incorporated in 4 modules • Module #1 – Network screening • Module #2 – Diagnosis and countermeasure selection • Module #3 – Economic appraisal and priority ranking • Module #4 - Evaluation

  12. Network Screening to Identify Sites with Promise • Use expected safety performance and actual accident history to review sites • Identify SITES WITH PROMISE – sites that have promise for reducing accidents in a cost-effective manner • Review entire roadway system or selected parts – roadway segments, intersections, ramps, railroad grade crossings, etc.

  13. Diagnose Safety Concerns at Selected Sites • Consider both sites with promise identified by network screening tool and from other sources • Identify accident patterns • Investigate causal factors • Consider site conditions and safety performance from engineering and human factors viewpoints • Assess whether a potentially correctable safety concern exists

  14. Select Appropriate Countermeasures • Present lists of countermeasures that are potentially appropriate for identified accident patterns and safety concerns • Final selection made by user • Where appropriate, user may select: • combination of countermeasures • alternative countermeasures for economic appraisal and priority ranking

  15. Economic Appraisal of Candidate Improvements • Assess expected project benefits • Assess expected project costs • Display results • Provide economic analysis and ranking compatible with HSIP requirements

  16. Priority Ranking of Candidate Improvements • Ranking by economic appraisal results: • Cost effectiveness ($/accident reduced) • Benefit-cost ratio (B/C) • Net present benefits (B – C) • Project selection to maximize safety benefits within a budget constraint • Integer programming • Dynamic programming • Incremental B/C ratio

  17. Evaluation • Use available data to estimate the safety effect of projects implemented at specific sites • Before-after evaluations using robust statistical techniques • Primary MOE – percentage reduction in accidents

  18. How Will Safety AnalystBe Implemented? • SafetyAnalyst will be implemented as a set of integrated software tools to perform key steps in the safety management process • SafetyAnalyst will be made available to highway agencies by FHWA • SafetyAnalyst will be maintained as the state of knowledge advances

  19. What Has Been Accomplished Already? • Project began: April 2001 • Meetings with TWG • Work plan and Marketing plan • White Papers with technical approaches to modules • Training course is being revised

  20. What Is the Planned Schedule? • “New Approaches to Highway Safety Analysis“ training course – Fall 2003 • Release interim tools – 2004 • Release final tools – 2006

  21. SafetyAnalyst Website www.safetyanalyst.org

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