00639781

Component

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.

VTI Rapport 372A, Part 3

English

v.p.

1991-9

VTI Rapport

Proceedings of the Conference, Strategic Highway Research Program and Traffic Safety on Two Continents, Part Three

Figures; References

Passing sight distance; Railroad crashes; Railroad grade crossings; Sight distance; Signalized intersections; Traffic crashes; Traffic signal preemption

Railroad grade crossing collisions

Highways; Operations and Traffic Management; Railroads; I73: Traffic Control

TRIS, TRB

Dec 3 1993 12:00AM

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