Judgments in the selection of path generation techniques: a meta-analytic approach

Carlo Giacomo Prato

    Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearch

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    In the context of modeling route choice behavior, modelers generate objective choice sets by selecting a path generation technique and its parameters according to personal judgments. The current paper proposes an experimental setting and a methodological approach to provide indications about objective judgments for effective route choice set generation.
    Initially, path generation techniques are implemented within a synthetic network to generate possible subjective choice sets considered by travelers. Next, “true model estimates” and “postulated predicted routes” are assumed from the simulation of a route choice model. Then, objective choice sets are applied for model estimation and results are compared to the “true model estimates”. Last, predictions from the simulation of models estimated with objective choice sets are compared to the “postulated predicted routes”.
    Meta-analysis allows synthesizing the effect of judgments on the implementation of path generation techniques, since a large number of models generate a large amount of results that are otherwise difficult to summarize and to process. Meta-analysis estimates suggest that modelers should apply stochastic approaches with the possibility of correcting for unequal sampling probability while maintaining a fairly reasonable level of variance. Estimation of models would greatly improve and the issue of the coverage of observed behavior would not be raised because the correction would cover for adding alternatives not generated.
    Original languageEnglish
    Title of host publicationThe 91st Annual Meeting of the Transportation Research Board, Washington,DC 2012
    Number of pages19
    Publication date2012
    Publication statusPublished - 2012
    EventTransportation Research Board 91st Annual Meeting - Washington,DC, United States
    Duration: 22 Jan 201226 Jan 2012


    ConferenceTransportation Research Board 91st Annual Meeting
    CountryUnited States
    Internet address


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