00467861

Component

http://onlinepubs.trb.org...trr/1987/1114/1114-012.pdf

https://scholar.google.co...wman&publication_year=1987

Presented in this paper are the results of two tasks of a study sponsored by the Federal Highway Administration. The purpose of these tasks was to determine the effectiveness of railroad constant warning time (CWT) systems in (a) reducing motorists violation of activated at-grade warning systems, and (b) reducing vehicle-train accidents. CWT systems have the capability of measuring train motion, direction of movement, and distance from the crossing. These parameters are interpreted by the control logic to provide estimates of train speed and arrival time. When the estimated arrival time achieves a preselected minimum, such as 20 sec, the warning displays at the crossing are activated. Analysis of operational data indicated that CWT systems are effective in providing both a uniform amount of the advance warning and in reducing motorist violation of the warning system. A comparative analysis of vehicle-train accidents occurring from 1980 through 1984 was also performed. This analysis indicated that, in the majority of cases, crossings with CWT systems have a lower accident rate than crossings without CWT. Nevertheless, this difference was not large enough to be statistically significant at the 95 percent confidence level.

Publication of this paper sponsored by Committee on Railroad-Highway Grade Crossings. 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

01418073

pp 111-122

1987

Transportation Research Record

0309044669

Print

Figures (3) ; References (2) ; Tables (19)

Activation (Chemistry); Crash rates; Measures of effectiveness; Railroad grade crossings; Reduction (Chemistry); Safety; Traffic safety; Traffic violations; Warning systems

Effectiveness

Highways; Operations and Traffic Management; Railroads; Safety and Human Factors; Security and Emergencies; I73: Traffic Control

TRIS, TRB, ATRI

Mar 31 1988 12:00AM

• A BEHAVIORAL APPROACH TO RISK ESTIMATION OF REAR-END COLLISIONS AT SIGNALIZED INTERSECTIONS
• A COMPARISON OF FORMULAE FOR PREDICTING RAIL-HIGHWAY CROSSING HAZARDS (ABRIDGMENT) (DISCUSSION AND CLOSURE)
• ACCIDENT CAUSATION ANALYSIS AT RAILROAD CROSSINGS PROTECTED BY GATES
• ANALYSIS OF RAILROAD-HIGHWAY CROSSING ACTIVE ADVANCE WARNING DEVICES
• CONVERSION FROM PERMISSIVE TO EXCLUSIVE/PERMISSIVE LEFT-TURN PHASING: A BEFORE-AND-AFTER EVALUATION (DISCUSSION AND CLOSURE)
• EFFECTS OF CHEVRONS, POST-MOUNTED DELINEATORS, AND RAISED PAVEMENT MARKERS ON DRIVER BEHAVIOR AT ROADWAY CURVES
• EFFECTS OF REDUCED SPEED LIMITS IN RAPIDLY DEVELOPING URBAN FRINGE AREAS (ABRIDGMENT)
• EVALUATION OF WIDE EDGELINES (DISCUSSION AND CLOSURE)
• EVIPAS: A COMPUTER MODEL FOR THE OPTIMAL DESIGN OF A VEHICLE-ACTUATED TRAFFIC SIGNAL
• HOW TO ESTIMATE THE SAFETY OF RAIL-HIGHWAY GRADE CROSSINGS AND THE SAFETY EFFECTS OF WARNING DEVICES
• IDENTIFICATION OF NEEDED TRAFFIC CONTROL DEVICE RESEARCH
• OPERATIONAL ANALYSIS OF EXCLUSIVE LEFT-TURN LANES WITH PROTECTED/PERMITTED PHASING (DISCUSSION AND CLOSURE)
• REGIONAL DIFFERENCES IN PREFERENCES FOR MEDIAN CROSSOVER SIGNING
• TRAFFIC OPERATIONS OF BASIC TRAFFIC-ACTUATED CONTROL SYSTEMS AT DIAMOND INTERCHANGES
• UTILIZATION AND TIMING OF SIGNAL CHANGE INTERVAL
• WEIGHT-SPECIFIC HIGHWAY SIGN EFFECTS ON HEAVY TRUCKS