Evaluating the Effectiveness of the Safety Investment Program (SIP) Policies for Oregon

The Safety Investment Program (SIP) was originally called the Statewide Transportation Improvement Program - Safety Investment Program (STIP-SIP). The concept of the program was first discussed in October 1997 and the program was adopted by the Oregon Transportation Commission in August 1998. The concept for the program grew out of a cost-effective approach to pavement preservation projects that set out to maximize the impact of money spent on highway safety, based on crash reduction factors. Safety projects were to be selected based on high crash locations as identified by the Safety Priority Index System (SPIS) and SIP Category ratings of five-mile sections. This research evaluated the SIP Policy from the perspective of: 1) an overall program for safety improvement projects, 2) a guiding policy when safety improvements are planned as part of other project work, and 3) a component integrated with the highway design procedures for resurfacing, restoration, or rehabilitation (3R) projects. The research included two levels of evaluation; the first evaluation was done as part of the systematic evaluation, while the second was a project-level evaluation. The systematic evaluation revealed that, in general, projects where safety funds were used resulted in a net decrease in total crashes as well as severe and fatal crashes; however, these benefits were not realized for all locations or all work types. The detailed review of the 24 mixed safety-preservation projects highlighted some of the challenges of successfully implementing the SIP Policy. It was clear that the SIP Policy has not been applied consistently to mixed projects. In particular, the variety of design and, to a lesser extent, the funding eligibility scores, highlight the variety of policy interpretations. The project-level evaluation concluded that the most important project element to improve safety performance was the specific identification of a safety problem. Recommendations were made on improved documentation procedures at the project level as well as strategies to improve overall policy compliance.


  • English

Media Info

  • Media Type: Web
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 180p

Subject/Index Terms

Filing Info

  • Accession Number: 01143661
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-OR-RD-10-05, OTREC-RR-10-11
  • Contract Numbers: SPR 651
  • Created Date: Nov 2 2009 11:20AM