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Evaluations of Low Cost Safety Improvements Pooled Fund Study (ELCSI–PFS)

 

NEWS

  • The Development of Crash Modification Factors (DCMF) Program CMF Stakeholder Meeting occured on May 28, 2014 at Turner-Fairbank Highway Research Center (TFHRC).

  • The ELCSI–PFS 2015 Annual Technical Advisory Committee (TAC) meeting will take place on June 2 and June 3, 2015 at Turner-Fairbank Highway Research Center (TFHRC).

  • The Development of Crash Modification Factors (DCMF) study for “Focus Crash Types and Risk Factors” for systemic safety applications and crash modification factor (CMF) developments is active and will be completed in 2016.

  • The ELCSI-PFS, Phase IX for Evaluation of High Friction Safety Improvements will start in May 2015.

  • The Safety Evaluation of Centerline Plus Shoulder Rumble Strips is complete.

  • The Safety Evaluation of Continuous Green T Intersections is complete.

  • The Safety Evaluation of Intersection Conflict Warning Systems (ICWS) is complete.

  • The Safety Evaluation of Wet-Reflective Pavement Markings is complete.

The Evaluation of Low Cost Safety Improvements Pooled Fund Study (ELCSI–PFS) is conducted under and supported by the Development of Crash Modification Factors  program. The ELCSI–PFS, which consists of 38 State departments of transportation (DOTs) members, provide technical feedback on priority safety improvement evaluations to the DCMF program for low- to high-cost improvements, and implement new safety improvements to facilitate evaluations.

The DCMF program provides research products such as new statistical methodologies, identification of focus crash types, and current and future CMFs research needs to support ELCSI–PFS efforts.

Objective: The goal of this research is to develop reliable estimates of the effectiveness of the safety improvements identified as strategies in the National Cooperative Highway Research Program (NCHRP) Report 500 Guidebooks. These estimates are determined by conducting scientifically rigorous before-and-after evaluations at sites in the United States where these strategies are being implemented.

Scope of Work:The scope of the ELCSI–PFS is to conduct a research project of the priority strategies in the NCHRP Report 500 Guides. A target of 20 strategies totaling $4.38 million over 5 years was originally planned for ELCSI–PFS in four phases. Currently, this study has outperformed its original goals, and has added four extra phases for a total of nine phases. To provide reliable measures for effectiveness of various low-cost safety improvements, this study's performance period has been extended beyond 2017.

Resources: The data for this study will be gathered from States that either have already implemented the selected strategies or will implement the strategies over the next few years. The greater the number of States implementing the strategies, the faster the rate of "after" data collection, which shortens the total time required for each evaluation.

Methodology: The methodology used has been an Empirical Bayes evaluation, using before-and-after data to determine the effectiveness of the selected strategies in reducing the number and severity of crashes.

To support the ELCSI–PFS efforts, Federal Highway Administration (FHWA) and the DCMF program conduct regular technical experts meetings in cooperation with the American Statistical Association (ASA) to identify new statistical methodologies and to improve and advance the current practices used in the development of safety performance functions (SPFs) and CMFs.

This map of the United States shows States colored light green to indicate participation in the Evaluations of Low Cost Safety Improvements Pooled Fund Study. The States in the light green color include Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nevada, New Hampshire, New York, North Carolina, North Dakota, Oklahoma, Ohio, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Washington State, and Wisconsin. All other States are colored dark green and indicate that they do not participate in the Evaluations of Low Cost Safety Improvements Pooled Fund Study.

Participating States in the ELCSI–PFS.

Participating States: Alabama, Arizona, Arkansas, California, Colorado, Connecticut, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nevada, New Hampshire, New York, North Carolina, North Dakota, Oklahoma, Ohio, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Washington State, and Wisconsin.

Technical Advisory Committee Meeting: The Technical Advisory Committee (TAC) Annual Meeting agenda is to generate information critical to States’ safety efforts. Some of the information includes:

  • Adding to a strong knowledge base by bringing the States’ experiences and perspective to the discussion.

  • Revealing new safety strategies or issues facing our Nation’s roadways that may not be receiving proper attention.

  • Increasing the accuracy of study results by having States contribute data and enhance study sample size.

  • Engaging the States in a discussion of issues and challenges confronting each State, and learning how these issues are managed.

  • Determining priority safety improvements for evaluations through balloting conducted in the meeting.

Strategy Selections: Currently, the ELCSI–PFS has nine phases (I–IX). Strategies for all phases are selected through balloting conducted at the annual TAC meetings.

Results and Applications: The goal of the ELCSI–PFS is to provide a CMF and benefit/cost economic analysis for each of the targeted safety strategies. The CMFs and the economic analyses will be used by the Department of Transportation (DOT) to plan for the implementation of these safety improvements. The goal is to learn and improve processes to assist in the field implementation of these safety strategies. The degree of success in the evaluation of each strategy will vary depending on the level of DOT support and the availability and reliability of the collected data.

The final result of the ELCSI–PFS will be published by FHWA. It will also serve as a resource for the Highway Safety Manual (HSM) and other technical publications.

Dissemination of Results: Please see the Publications links.

For more information contact:
Roya Amjadi, Research Highway Safety Specialist
Federal Highway Administration
Office of Safety Research and Development
6300 Georgetown Pike
McLean, VA 22101
Phone: 202–493–3383
Fax: 202–493–3374
Email: roya.amjadi@dot.gov

 

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