SAFETY EVALUATION AT THREE-LEG, UNSIGNALIZED INTERSECTIONS BY TRAFFIC CONFLICT TECHNIQUE
The FHWA procedure detailed in "Traffic Conflict Techniques for Safety and Operations" was used to collect data on conflicts at 18 three-leg, unsignalized intersections. The objectives were to identify the average and abnormal conflict rates at three-leg, unsignalized intersections in the city of Amman, Jordan, and to relate traffic conflicts to traffic volumes and accidents. The average and abnormal limits can be used to evaluate comparable three-leg, unsignalized intersections by the traffic conflict technique. A risk index was developed on the basis of various conflict types and related accidents to priority rank the intersections for adopting countermeasures. The study found that the predominant conflict type was the left-turn, same-direction conflict. Multiple regression technique was applied between different conflict types and combinations of traffic flows generating those conflicts at various intersection categories. Most of the predicted relationships indicated that traffic conflicts are dependent on different combinations of the generating flows. In addition, multiple regression technique was applied to relate accidents to traffic conflicts. The results revealed that accidents and conflicts are related by a linear relationship.
- Record URL:
- Record URL:
-
Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/03611981
-
Supplemental Notes:
- This paper appears in Transportation Research Record No. 1485, Human Performance and Safety in Highway, Traffic, and ITS Systems. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
-
Authors:
- Salman, Nabeel K
- Al-Maita, Kholoud J
- Publication Date: 1995
Language
- English
Media Info
- Features: Figures; References; Tables;
- Pagination: p. 177-185
- Monograph Title: Human performance and safety in highway, traffic, and ITS systems
-
Serial:
- Transportation Research Record
- Issue Number: 1485
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Countermeasures; Data collection; Hazards; Left turns; Multiple regression analysis; Ratings; Risk assessment; Strategic planning; Traffic conflicts; Traffic crashes; Traffic flow; Traffic volume; Unsignalized intersections
- Geographic Terms: Amman (Jordan)
- Old TRIS Terms: Multiple regression; Three way intersections
- Subject Areas: Highways; Safety and Human Factors; I82: Accidents and Transport Infrastructure;
Filing Info
- Accession Number: 00713551
- Record Type: Publication
- Files: TRIS, TRB, ATRI
- Created Date: Nov 13 1995 12:00AM