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  • 2005-2009  (3)
  • Mobilitäts- und Verkehrsforschung  (3)
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  • 2005-2009  (3)
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  • Mobilitäts- und Verkehrsforschung  (3)
  • 1
    Online-Ressource
    Online-Ressource
    Planning and Design of a Taxipooling Dispatching System
    SAGE Publications ; 2005
    In:  Transportation Research Record: Journal of the Transportation Research Board Vol. 1903, No. 1 ( 2005-01), p. 86-95
    Details
    In: Transportation Research Record: Journal of the Transportation Research Board, SAGE Publications, Vol. 1903, No. 1 ( 2005-01), p. 86-95
    Kurzfassung: Shifting people from driving to using public transportation has been important in alleviating urban traffic congestion. Intelligent transportation system technologies applied to public transportation can provide useful data to system operators and users and increase the use and productivity of high-occupancy vehicles. Integration of metropolitan rapid transit, feeder buses, and taxipooling can attract more public transportation users. Advanced taxipooling transfer assignment systems, a type of advanced public transportation systems program, aims to apply advanced technologies to taxi operations, including dynamic taxi fleet management, taxipooling strategies, and safety monitoring systems. Success in using taxis as a feeder service to mass transit systems requires advanced information technologies such as the Global Positioning System, geographic information systems, wireless communications, and, most important, an efficient taxi dispatching algorithm. The objectives and background of a dedicated taxipooling fleet in a metropolitan area are given. Also, a real-time, two-step taxipooling dispatching system is presented. A case study with parameter values obtained from Taiwan is explained; the simulation result is interpreted to illustrate the feasibility of the algorithm. Sensitivity analysis proves the robustness of the dispatching algorithm and shows the flexibility decision makers can have to serve certain purposes. Assumptions and constraints of the proposed dispatching system are evaluated, and the possibility of system expansion is discussed.
    Materialart: Online-Ressource
    ISSN: 0361-1981 , 2169-4052
    URL: Article
    DOI: 10.1177/0361198105190300110
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 2005
    ZDB Id: 2403378-9
    Standort Signatur Einschränkungen Verfügbarkeit
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    Online-Ressource
  • 2
    Online-Ressource
    Online-Ressource
    Real-Time Estimation of Urban Street Segment Travel Time Using Buses as Speed Probes
    SAGE Publications ; 2009
    In:  Transportation Research Record: Journal of the Transportation Research Board Vol. 2129, No. 1 ( 2009-01), p. 81-89
    Details
    In: Transportation Research Record: Journal of the Transportation Research Board, SAGE Publications, Vol. 2129, No. 1 ( 2009-01), p. 81-89
    Kurzfassung: Using transit buses as probes to detect general vehicle traffic conditions could be a real-time traffic monitoring mechanism in an urban advanced traveler information system. The feasibility of such an application depends primarily on the existence of quantifiable relationships between bus traffic and general vehicle traffic and infrequent bus travel observations (constrained by the scheduled bus headway and route configuration) that are sufficiently sensitive to infer real-time general vehicle traffic conditions. Considering that urban bus probe studies have focused only on the first criterion, this study is designed to examine real-time sensitivity between buses and cars. A generic framework of real-time urban travel time estimation is proposed, followed by a field study in which real-time bus travel information is available and a simulation study that examines the impact of passenger demand on performance of the proposed framework. The study findings provide insights into the feasibility of a real bus probe application in an urban traffic environment. Future studies are desired to explore bus probe performance in nonrecurrent traffic congestion.
    Materialart: Online-Ressource
    ISSN: 0361-1981 , 2169-4052
    URL: Article
    DOI: 10.3141/2129-10
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 2009
    ZDB Id: 2403378-9
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Online-Ressource
  • 3
    Online-Ressource
    Online-Ressource
    Model-Based Synthesis of Household Travel Survey Data in Small and Midsize Metropolitan Areas
    SAGE Publications ; 2009
    In:  Transportation Research Record: Journal of the Transportation Research Board Vol. 2105, No. 1 ( 2009-01), p. 64-70
    Details
    In: Transportation Research Record: Journal of the Transportation Research Board, SAGE Publications, Vol. 2105, No. 1 ( 2009-01), p. 64-70
    Kurzfassung: Household travel data synthesis–simulation has become a promising alternative or supplement to survey data from both small urban areas and large metropolitan regions in which data are expensive to collect or the data required to support the planning process have become outdated. This paper proposes and applies model-based approaches [i.e., small area estimation (SAE) methods] to synthesize household travel characteristics. The proposed methods address the sampling-bias concerns in the existing methods. Specifically, three SAE methods–-the generalized regression estimators method, the empirical best linear unbiased predictor (EBLUP) method, and the synthetic method (an EBLUP without random area effects)–-are applied to synthesize household travel characteristics at both census tract and individual levels. The SAE framework of synthesizing household travel characteristics is demonstrated with the National Household Travel Survey data and the Census Transportation Planning Package data in the Des Moines metropolitan area in central Iowa. Results indicate that SAE methods are promising approaches to synthesize unbiased aggregate and disaggregate household travel characteristics by incorporating population auxiliary information and local, small-household travel survey data. The proposed data synthesis methods and analysis findings will provide a useful tool for practitioners, planners, and policy makers in transportation analyses. The paper also points out that by linking population synthesis with the travel data simulation framework described here, this method could be of broad application in transportation planning.
    Materialart: Online-Ressource
    ISSN: 0361-1981 , 2169-4052
    URL: Article
    DOI: 10.3141/2105-09
    Sprache: Englisch
    Verlag: SAGE Publications
    Publikationsdatum: 2009
    ZDB Id: 2403378-9
    Standort Signatur Einschränkungen Verfügbarkeit
    BibTip Andere fanden auch interessant ...
    Online-Ressource
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