FACTORS INFLUENCING SAFETY AT HIGHWAY-RAIL GRADE CROSSINGS
A COMPREHENSIVE ANALYSIS AND REVIEW WAS UNDERTAKEN OF AVAILABLE DATA AND INFORMATION APPLICABLE TO THE PROBLEM OF IMPROVING SAFETY AT HIGHWAY RAIL GRADE CROSSINGS. A PROBABILITY MODEL WAS DEVELOPED FOR FORECASTING THE PROBABILITY OF ACCIDENT OCCURRENCE AT CROSSINGS. THE MODEL ALLOWS THE SEPARATE PREDICTION OF EXPECTED ACCIDENTS WHICH INVOLVE TRAINS AND ACCIDENTS WHICH DO NOT INVOLVE TRAINS BUT OCCUR AT THE CROSSING. IT WAS FOUND THAT TRAIN ACCIDENT OCCURRENCE IS RELATED TO THE PROBABILITY OF VEHICLE AND TRAIN ARRIVALS AND TYPE OF PROTECTION AT THE CROSSING. OTHER RELATED FACTORS ARE THE ENVIRONMENT OF THE CROSSING, THE ANGLE OF CROSSING, THE APPROACH GRADIENT AND NUMBER OF HIGHWAY LANES. NON-TRAIN INVOLVED ACCIDENTS ARE RELATED TO THE NUMBER OF HIGHWAY VEHICLES. OTHER FACTORS ARE THE PRESENCE OF AUTOMATIC GATES AND THE NUMBER OF TRAINS. ACCIDENTS WHICH INVOLVE TRAINS ACCOUNTED FOR ONLY ABOUT TWENTY TO THIRTY PERCENT OF THE ACCIDENTS OCCURRING AT RAILROAD CROSSINGS. WARRANTS FOR IMPROVEMENTS AT RAILROAD CROSSINGS WERE DEVELOPED, INCLUDING IMPROVED SIGNING AND INCREASED SIGHT DISTANCE. A METHOD WAS DEVELOPED FOR DETERMINING THE ADEQUACY OF SIGHT DISTANCE AT RAILROAD CROSSINGS INCORPORATING NORMAL HIGHWAY DESIGN CRITERIA AND TRAIN SPEED.
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Supplemental Notes:
- 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.
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Authors:
- Schoppert, D W
- Hoyt, D W
- Publication Date: 1967-8
Media Info
- Media Type: Digital/other
- Pagination: 113 p.
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Serial:
- NCHRP Report
- Issue Number: 50
- Publisher: Transportation Research Board
- ISSN: 0077-5614
Subject/Index Terms
- TRT Terms: Forecasting; Improvements; Mathematical models; Prevention; Probability theory; Railroad grade crossings; Railroad trains; Reviews; Safety; Sight distance; Signs; Traffic crashes; Vehicles
- Uncontrolled Terms: Models
- Subject Areas: Data and Information Technology; Design; Highways; Operations and Traffic Management; Railroads; Safety and Human Factors; Security and Emergencies; Vehicles and Equipment;
Filing Info
- Accession Number: 00219930
- Record Type: Publication
- Report/Paper Numbers: Project 3-8, HS-003 855
- Files: HSL, TRIS, ATRI
- Created Date: Sep 27 1994 12:00AM