00467865

Component

http://onlinepubs.trb.org...trr/1987/1114/1114-016.pdf

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

The need for improvement at a rail-highway crossing typically is based on the expected accident rate (EAR) in conjunction with other criteria carrying lesser weight. In recent years new models for assessing the need for improvements have been developed, and in the research reported here, five such models selected from a list established from a literature review and a user survey were evaluated. The selected models--the U.S. Department of Transportation (DOT), Peabody-Dimmick, NCHRP Report 50, Coleman-Stewart, and New Hampshire--were evaluated using a data base maintained by the Virginia Department of Highways and Transportation. In addition, the performance of the methods for predicting the EAR were compared by using the chi-square test and the power factor. The results indicated that the DOT formula outperformed the other four methods in both the evaluative and comparative analyses, and thus was recommended for use. The priority list produced by this formula is only one criterion used in determining the need to improve conditions at any crossing. This information must be supplemented by regular site inspections and other qualitative issues that cannot be feasibly incorporated into a mathematical formula.

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

Berg, W D

pp 152-155

1987

Transportation Research Record

0309044669

Print

References (8) ; Tables (2)

Alternatives analysis; Chi square test; Crash rates; Forecasting; Formulas; Hazards; Mathematical models; Power factor (Electricity); Railroad grade crossings

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

TRIS, TRB

Mar 31 1988 12:00AM

• A BEHAVIORAL APPROACH TO RISK ESTIMATION OF REAR-END COLLISIONS AT SIGNALIZED INTERSECTIONS
• 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
• THE EFFECTIVENESS OF RAILROAD CONSTANT WARNING TIME SYSTEMS
• 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