00334167

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This paper presents the findings and conclusions of a study to develop an experimental design and analysis plan for field testing and evaluation of the accident-reduction potential of a proposed new railroad grade-crossing advance-warning sign. Several alternative sampling frameworks were initially developed to determine which might offer the most-efficient design in terms of required sample size. It was found that for a three- to five-year data collection period, the sample size required to detect even a 5 percent reduction in accident rate could exceed the total population of available sites. Therefore, an analysis was undertaken to determine the minimum relative reduction in accident rate that would economically justify deployment of the new advance-warning sign. The cost of undertaking the field studies and analyses was then evaluated so that it could be compared with the expected value or usefulness of the information to be derived from the study. The results indicated that the proposed accident study would be both experimentally and economically impractical. It was therefore recommended that an accident study not be undertaken. Several alternative policy options are then examined. (Author)

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

01411593

pp 1-6

1980

Transportation Research Record

0309031176

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Figures (1) ; References (11) ; Tables (3)

Analysis; Benefit cost analysis; Feasibility analysis; Field tests; Grade crossing protection systems; Prevention; Railroad grade crossings; Safety; Statistical analysis; Statistical sampling; Warning devices; Warning signs

Data and Information Technology; Highways; Operations and Traffic Management; Railroads; Safety and Human Factors; Security and Emergencies; I73: Traffic Control; I85: Safety Devices used in Transport Infrastructure

TRIS, TRB

Aug 15 1981 12:00AM

• COUNTERMEASURES TO IMPROVE SAFETY AT MULTILANE RURAL INTERSECTIONS (ABRIDGMENT)
• EVALUATION OF AN ALGORITHM FOR DETECTING URBAN FREEWAY INCIDENTS DURING LOW-VOLUME CONDITIONS
• INVESTIGATION OF THE EFFECT OF LOCATION OF FREEWAY TRAFFIC SENSORS ON INCIDENT DETECTION
• LUMINAIRE PERFORMANCE ON ILLUMINATED OVERHEAD SIGNS (ABRIDGMENT)
• NIGHT VISIBILITY OF TRAINS AT RAILROAD-HIGHWAY GRADE CROSSINGS. ABRIDGMENT
• ON FORECASTING FREEWAY OCCUPANCIES AND VOLUMES (ABRIDGMENT)
• OPTIMUM LENGTH OF TWO-LANE TWO-WAY NO-PASSING TRAFFIC OPERATION IN CONSTRUCTION AND MAINTENANCE ZONES ON RURAL FOUR-LANE DIVIDED HIGHWAYS
• SELECTION AND EVALUATION OF OPTIMAL FREEWAY DESIGN BY COMPUTER SIMULATION
• TRANSVERSE PAVEMENT MARKINGS FOR SPEED CONTROL AND ACCIDENT REDUCTION (ABRIDGMENT)