After evauating alternative measures within a logistics framework, this report recommends two measures of reliability, the maximum percentage of cars whose trip times fall in a consecutive two or three day period of the trip time distribution (the 2- or 3-day%) and the percentage of cars arriving after this period (the %-late). Nevertheless, a dialogue with shippers is necessary before the most appropriate measures can be determined for a specific situation. Using these measures, origin-to-destination (O-D) data for three railroads are analyzed to discover the nature of O-D reliability. Although yard classifications are found to affect reliability much more than does distance, detailed train information is necessary to predict the nature of this impact for a particular O-D pair. Reducing the number of classifications or improving yard operations will improve both reliability and mean trip times.
Studies in Railroad Operations and Economics. Volume 2. Rail Trip Time Reliability: Evaluation of Performance Measures and Analysis of Trip Time Data
1972
110 pages
Report
Keine Angabe
Englisch