Roadside Safety Analysis Program (RSAP) Update

Roadside Safety Analysis Program (RSAP) was developed under NCHRP Project 22-9, "Improved Methods for the Cost-Effectiveness Evaluation of Roadside Safety Feature," to update and enhance the cost-effectiveness analysis algorithms and procedures of the ROADSIDE software included in the Roadside Design Guide (RDG). Subsequently, under NCHRP Project 22-9(2), RSAP was revised and Appendix A was included in the 2002 edition of the AASHTO Roadside Design Guide. Since the release of RSAP, users have identified some bugs and problems with the program in field applications. Efforts to fix these program bugs and problems resulted in numerous revisions and "patches" to the program over the years. In addition, a number of needed enhancements have been identified that would improve the operation and functionality of the program under current PC operating systems. Another area of concern is the appropriateness and consistency of the default relationships and data tables embedded in the program. Recent research has improved insights on the relationships about the probability of roadside encroachments, the severity of crashes, and nature of roadside features. The NCHRP projects that led to the development of RSAP did not have the resources to update the relationships and data, so the best available were used. For example, the severity indices tables are believed to need a critical review and updating based upon the results of thousands of RSAP runs made under NCHRP Project 22-12(2), which is aiming to provide guidelines for cost-effective deployment of barriers. Other, more mundane default items, such as costs and lists of basic user-selectable elements in the program, may also warrant updating. This effort is expected to make appropriate updates to the RSAP documentation to allow an updated version to be included in the next version of the Roadside Design Guide. The objectives of this project are to rewrite the software and update the embedded default data tables (e.g., severity indices) of the RSAP. To accomplish the project objective the following tasks are recommended: (1) conduct a literature review for updating the algorithms, procedures and built-in data of the RSAP program, including the severity indices; (2) rewrite the software; (3) update the severity indices; (4) conduct beta testing of the program and make revisions; and (5) submit the final report and software.</font></span></div>


  • English


  • Status: Completed
  • Contract Numbers:

    Project 22-27

  • Sponsor Organizations:

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001
  • Project Managers:

    Niessner, Charles

  • Principal Investigators:

    Ray, Malcolm

  • Start Date: 20090128
  • Expected Completion Date: 0
  • Actual Completion Date: 20100727
  • Source Data: RiP Project 18044

Subject/Index Terms

Filing Info

  • Accession Number: 01464464
  • Record Type: Research project
  • Source Agency: National Cooperative Highway Research Program
  • Contract Numbers: Project 22-27
  • Files: TRB, RiP, USDOT
  • Created Date: Jan 3 2013 2:43PM