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Evaluation of the traffic conflicts technique

Author: Bruce Allen Thorson; John C Glennon; United States. Federal Highway Administration.; Midwest Research Institute (Kansas City, Mo.)
Publisher: Washington : Federal Highway Administration ; Springfield, Va. : Available through the National Technical Information Service, 1975.
Series: United States.; Federal Highway Administration.; Report
Edition/Format:   Print book : National government publication : EnglishView all editions and formats
Summary:
Traffic accidents are the ideal measure of safety for a highway location. But attempts to estimate the relative safety of a highway location are usually fraught with the problems associated with the unreliability of accident records and the time required to wait for adequate sample sizes. For these reasons, the Traffic Conflicts Technique (TCT) was developed as a surrogate measure in an attempt to objectively  Read more...
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Material Type: Government publication, National government publication, Internet resource
Document Type: Book, Internet Resource
All Authors / Contributors: Bruce Allen Thorson; John C Glennon; United States. Federal Highway Administration.; Midwest Research Institute (Kansas City, Mo.)
OCLC Number: 2599640
Notes: Prepared by Midwest Research Institute for U.S. Federal Highway Administration, contract no. DOT-FH-11-8121, final report.
Description: 44 pages.
Contents: Introduction --
Description of the Traffic Conflicts Technique --
Critical review of previous traffic conflict studies --
Evaluation of traffic conflicts as an experimental response variable --
Assessment of the Traffic Conflicts Technique --
References.
Series Title: United States.; Federal Highway Administration.; Report
Other Titles: Traffic conflicts technique
Responsibility: B.A. Thorson, J.C. Glennon.

Abstract:

Traffic accidents are the ideal measure of safety for a highway location. But attempts to estimate the relative safety of a highway location are usually fraught with the problems associated with the unreliability of accident records and the time required to wait for adequate sample sizes. For these reasons, the Traffic Conflicts Technique (TCT) was developed as a surrogate measure in an attempt to objectively measure the accident potential of a highway location without having to wait for an accident history to evolve. The TCT was originally developed by the General Motors Research Laboratories (GMR) in 1967. It was conceived as a systematic method of observing and measuring accident potential. Conflicts were defined as the occurrence of evasive vehicular actions and characterized by braking and/or weaving maneuvers. This report critically evaluates the state-of-the-art of the TCT and the results of recent attempts to develop a rigorous experimental design using traffic conflicts as the basic response variable to measure the effectiveness of access control techniques at commercial driveways.

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