New methodology for estimating reliability in transportation networks with degraded link capacities

    Authors

    H. Al-Deek;E. B. Emam

    Comments

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    Abbreviated Journal Title

    J. Intell. Transport. Syst.

    Keywords

    reliability; capacity; transportation networks; travel time; ROAD NETWORK; EQUILIBRIUM; SYSTEMS; Transportation Science & Technology

    Abstract

    The measurement of transportation network reliability is a complex issue because it involves both the infrastructure and the behavioral responses of the users. This subject is challenging because there is no single agreed-upon reliability measure. Sources of system unreliability include natural and man-made disasters, recurrent events that result from demand variation, and nonrecurrent events that affect network supply such as incidents, work zones, and weather conditions. This article introduces a new method for estimating the effect of travel demand variation and link capacity degradation on the expected reliability of a roadway network. The method is applied to a roadway network and results of travel time reliability and capacity reliability are presented. The new travel time reliability method is sensitive to the users' perspective since it reflects that an increase in segment travel time should always result in less travel time reliability. This method can be expanded to large scale networks.

    Journal Title

    Journal of Intelligent Transportation Systems

    Volume

    10

    Issue/Number

    3

    Publication Date

    1-1-2006

    Document Type

    Article

    Language

    English

    First Page

    117

    Last Page

    129

    WOS Identifier

    WOS:000248104200002

    ISSN

    1547-2450

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