Annual average daily traffic (AADT) is important information for many transportation planning, design, operation, and maintenance activities and for funding allocation. Many studies have attempted AADT estimation by using various methods, such as the factor approach, regression analysis, and artificial neural networks. An application of geographically weighted regression (GWR) methods for estimating AADT is presented. GWR models allow model parameters to be estimated locally instead of globally, as in the case of ordinary linear regression (OLR) analysis. The spatial variation of the parameter estimates and the local R2 from the GWR models were investigated, and the AADT estimation errors were analyzed. Compared with OLR models, the GWR models were more accurate and were useful for studying the effects of the regressors at different locations.


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    Title :

    Using Geographically Weighted Regression Models to Estimate Annual Average Daily Traffic


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:
    Zhao, Fang (author) / Park, Nokil (author)


    Publication date :

    2004-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



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