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Arterial travel time estimation : revisiting the classical procedure

Bhaskar, Ashish, Chung, Edward, & Dumont, Andre-Gilles (2011) Arterial travel time estimation : revisiting the classical procedure. In Tisato, Peter, Oxlad, Lindsay, & Taylor, Michael (Eds.) Proceedings of the Australasian Transport Research Forum 2011, PATREC, Adelaide Hilton Hotel, Adelaide, SA, pp. 1-17.

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Abstract

Travel time is an important network performance measure and it quantifies congestion in a manner easily understood by all transport users. In urban networks, travel time estimation is challenging due to number of reasons such as, fluctuations in traffic flow due to traffic signals, significant flow to/from mid link sinks/sources, etc. The classical analytical procedure utilizes cumulative plots at upstream and downstream locations for estimating travel time between the two locations. In this paper, we discuss about the issues and challenges with classical analytical procedure such as its vulnerability to non conservation of flow between the two locations. The complexity with respect to exit movement specific travel time is discussed.

Recently, we have developed a methodology utilising classical procedure to estimate average travel time and its statistic on urban links (Bhaskar, Chung et al. 2010). Where, detector, signal and probe vehicle data is fused. In this paper we extend the methodology for route travel time estimation and test its performance using simulation. The originality is defining cumulative plots for each exit turning movement utilising historical database which is self updated after each estimation. The performance is also compared with a method solely based on probe (Probe-only). The performance of the proposed methodology has been found insensitive to different route flow, with average accuracy of more than 94% given a probe per estimation interval which is more than 5% increment in accuracy with respect to Probe-only method.

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ID Code: 46322
Item Type: Conference Paper
Keywords: Travel Time, CUPRITE, Cumulative Plots, Data Fusion, Urban Network
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CIVIL ENGINEERING (090500) > Transport Engineering (090507)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Past > Schools > School of Urban Development
Copyright Owner: 2011 Copyright University of South Australia and the South Australian Department for Transport, Energy and Infrastructure.
Deposited On: 10 Oct 2011 08:47
Last Modified: 11 Oct 2011 00:28

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