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Title	GUIDELINES FOR RAILROAD PREEMPTION AT SIGNALIZED INTERSECTIONS
Accession No	00639781
Authors	Marshall, Peter S.; Berg, W D
Conference Title	Proceedings of the Conference, Strategic Highway Research Program and Traffic Safety on Two Continents, Part Three
Journal Title	VTI Rapport
Corp. Authors / Publisher	National Swedish Road & Traffic Research Institute ; Transportation Research Board ; Swedish National Road and Transport Research Institute, VTI
Publication Date	19910900
Description	v.p.; Figures; References
Languages	English
Abstract	Preemption of traffic signal controllers near railroad grade crossings equipped with active warning devices is often required because queues from the intersection can extend back over the tracks, thereby creating the potential for a serious vehicle-train accident. This paper reports on the findings of a research study recently completed at the University of Wisconsin-Madison. The objective of the study was to develop methods for determining when preemption is required at isolated intersections, and for specifying the duration of the preemption intervals. Macroscopic traffic flow models and probability theory were used to describe the behavior of traffic under preemption conditions. Human factor considerations pertinent to the driving task were adapted from criteria currently used in establishing intersection sight distance and passing sight distance requirements. Limited resources precluded implementation and field evaluation of the developed methodologies.
TRT Terms	Passing sight distance ; Railroad accidents ; Railroad grade crossings ; Sight distance ; Signalized intersections ; Traffic accidents ; Traffic signal preemption
Other Terms	Preemption; Railroad grade crossing accidents; Vehicle train collisions
Subject Areas	H54 OPERATIONS AND TRAFFIC CONTROL; I73 Traffic Control
Report Number	VTI Rapport 372A, Part 3
Availability	National Swedish Road & Traffic Research Institute Find a library where document is available Order Document: http://worldcat.org/issn/03476030
TRIS Files	HRIS; RRIS
Database	TRIS Online

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