ACCIDENT PREDICTION MODELS FOR SIGNALIZED AND UNSIGNALIZED INTERSECTIONS: ADDENDUM

The Institute of Transportation Studies at the University of California, Berkeley, has developed Accident Prediction Models for signalized and unsignalized intersections for the State of California's Highway System. These prediction models are based on the Traffic Accident Surveillance and Analysis System (TASAS) as the data base, and a high powered, tree-building statistical tool known as Classification and Regression Trees (CART) for data regression to predict accidents for the approximate 2,500 signalized and 17,000 unsignalized intersections under CALTRANS' jurisdiction. The procedures employed to develop these prediction models are thoroughly discussed in the Final Project Reports of both projects. This document serves as an addendum to these Final Reports and addresses applications of the accident prediction model to traffic safety studies and investigations currently performed by CALTRANS. Applications addressed in this document include: List of Outliers and Input Data Entry Implications; Study of Group Factor Implications for Signalized and Unsignalized Intersections; Statistical Analysis of Prediction Model; Group Factor Tables for Signalized Intersections; Group Factor Tables for Unsignalized Intersections; and Development of User-Friendly Computer Software for Calculation of Expected Accidents (APSI).

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/10551417
• Corporate Authors:

  University of California, Berkeley

  Institute of Transportation Studies Library
  Berkeley, CA  United States  94720

  California Department of Transportation

  1120 N Street
  Sacramento, CA  United States  95814

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Naclerio, M T
  • Kruger, P
  • May, A D
• Publication Date: 1989-12

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 193 p.
• Serial:
  • Publication of: California University, Berkeley
  • Publisher: University of California, Berkeley
  • ISSN: 1055-1417

Subject/Index Terms

• TRT Terms: Applications; Crashes; Fatalities; Forecasting; Injuries; Loss and damage; Mathematical models; Property; Signalized intersections; Software; Statistical analysis; Tables (Data); Trees (Mathematics); Unsignalized intersections
• Uncontrolled Terms: Property damage
• Subject Areas: Data and Information Technology; Highways; Planning and Forecasting; Research; Safety and Human Factors; I81: Accident Statistics;

Filing Info

• Accession Number: 00600638
• Record Type: Publication
• Report/Paper Numbers: UCB-ITS-RR-89-17
• Files: TRIS, ATRI, USDOT, STATEDOT
• Created Date: Oct 31 1990 12:00AM