A Systematic Approach to Identifying Traffic Safety Needs and Intervention Programs for Indiana: Volume I—Research Report

This report presents the results of the Joint Transportation Research Program (JTRP) Project: “A Systematic Approach of Identifying Safety Intervention Programs for Indiana (SNIP2),” which aimed to develop the Safety Needs Identification Package (SNIP2) to support identification of roads that have excessive crashes of the types defined by the user. In addition, this tool is capable of selecting the best combination of high-crash roads and relevant safety interventions that maximizes the safety benefits and keeps the total cost within the budget and other user-defined constraints. Unlike other studies considering the implementation time of safety projects, the optimization objective of SNIP2 is to identify an optimal combination of countermeasures renewable within a long time horizon. This simplification is accomplished by representing the projects through their annualized costs and benefits. It allows consideration of many projects for large road networks and it makes the SNIP2 suitable for identification of safety focus areas in strategic safety plans. The SNIP optimizer – a heuristic approximation of a large-size mixed integer knapsack problem based on a greedy search was extensively tested and evaluated. It was found producing optimal or near-optimal solutions in a sufficiently short time. Another research result is a comprehensive catalog of countermeasures for Indiana – a list of countermeasure names, road and crash conditions for the countermeasure relevance, corresponding crash modification factors, and countermeasure costs. The SNIP2 is computer software developed with close collaboration with the Indiana Department of Transportation (INDOT) future users. It includes an updated crash and state road database. Volume II includes a user’s manual describing the necessary details of the software and various aspects of its use. Two example studies are also included in the manual to illustrate its use and to better present the SNIP2 features.

• Record URL:
  • https://doi.org/10.5703/1288284315497
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9781622603183
• Corporate Authors:

  Purdue University

  Joint Transportation Research Program
  West Lafayette, IN  United States  47907-2051

  Indiana Department of Transportation

  100 N Senate Avenue
  Indianapolis, IN  United States  46204

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Tarko, Andrew P
  • Li, Mingyang
  • Romero, Mario
  • Thomaz, Jose
• Publication Date: 2014-4

Language

• English

Media Info

• Media Type: Digital/other
• Edition: Final Report
• Features: Appendices; Figures; References; Tables;
• Pagination: 67p

Subject/Index Terms

• TRT Terms: Benefits; Costs; Countermeasures; Databases; High risk locations; Highway safety; Mixed integer programming; Software
• Geographic Terms: Indiana
• Subject Areas: Highways; Safety and Human Factors; I82: Accidents and Transport Infrastructure;

Filing Info

• Accession Number: 01548539
• Record Type: Publication
• ISBN: 978-1-62260-318-3
• Report/Paper Numbers: FHWA/IN/JTRP-2014/03
• Contract Numbers: SPR-3616
• Files: TRIS, ATRI, USDOT, STATEDOT
• Created Date: Dec 23 2014 12:08PM