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Accession Number PB2013-111635
Title Reliable Routing in Transit Networks.
Publication Date Jul 2013
Media Count 92p
Personal Author P. Chen Q. Li Y. Nie
Abstract The objectives of this project are (1) to make use of the newly emerging transit data sources for evaluating the variations in transit services (especially headway), and (2) to help passengers find optimal routing strategies to hedge against these service variations. The project first develops a data analysis tool (Transit Data Viewer) that is capable of building and visualizing empirical distributions of key transit operational parameters (headway, segment running time, dwell time and deviation from schedule) using space-time trajectories of transit vehicles. Statistical analysis is then performed to fit the processed headway data using various distributions. Based on the best fitted headway distribution, the project develops and implements a transit routing tool built on the notion of hyperpath (Transit Router). Note that transit systems are affected by variations in road traffic conditions and demand patterns, as well as major disruptions caused by extreme weather conditions, serious traffic accidents, unforeseeable mechanical failures and human errors. To cope with uncertainty, the proposed routing tool aims at finding an optimal hyperpath to minimize the expected journey time. The proposed tools are evaluated in a large-scale case study built from real data provided by the Chicago Transit Authority.
Keywords Chicago(Illinois)
Data analysis
Motor vehicle accidents
Public transportation
Statistical data
Traffic control
Transit industries
Transportation networks
Travel demand
Weather conditions

Source Agency Department of Transportation Office of University Research
NTIS Subject Category 91B - Transportation & Traffic Planning
43G - Transportation
85 - Transportation
Corporate Author Northwestern Univ., Evanston, IL. Dept. of Civil and Environmental Engineering.
Document Type Technical report
Title Note N/A
NTIS Issue Number 1326
Contract Number N/A

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