Open AccessEstimating the Reliability of Travel Time on Railway Networks for Freight Transportation
Author(s) -
Safoura Salehi,
Abbas Mahmoudabadi
Publication year - 2018
Publication title -
urban studies and public administration
Language(s) - English
Resource type - Journals
eISSN - 2576-1994
pISSN - 2576-1986
DOI - 10.22158/uspa.v1n1p75
Subject(s) - travel time , reliability (semiconductor) , schedule , arrival time , percentile , transport engineering , path (computing) , computer science , statistics , engineering , mathematics , computer network , power (physics) , physics , quantum mechanics , operating system
Railway freight transportation is an important transport system that its reliability causes economic issues. Freight carriers require predictable travel times to schedule their programs in competitive environment, so the estimation of reliability of travel time is very important. The present study proposes a travel time index that estimates the reliability of railway freight transportation and evaluates performance as well. Travel time reliability is estimated based on the shortest path between O-D pairs. Statistical measures of travel time, defining as the ratio of the 95th percentile travel time and the shortest path mean travel time as an ideal travel time, for each obtained route are calculated according to their selected links. Experimental data on Iranian rail network has been used as case study and results revealed that the routes less than 400 kilometers should be improved in terms of their reliabilities, because they are less reliable than long distance routes.