United States Department of Transportation
i
HOV to HOT Conversion Impacts on Carpooling
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2016-12-15
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[PDF-3.88 MB]
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TRIS Online Accession Number:1642599
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Abstract:High-occupancy toll (HOT) lanes are accepted as an effective way to manage travel demand and operate roadways suffering from capacity shortage. Thus, more HOT facilities are being planned and are under development. Given this situation, transportation agencies need to gain a comprehensive understanding of HOT operations for establishing appropriate HOT policies. To enhance their understanding, this study investigates the factors affecting drivers’ choices on HOT lane use and carpooling in the Atlanta I-85 HOT corridors. In the associated survey, a self-administered mail-out/mail-back method was employed, asking respondents about their lane (HOT or regular general-purpose lanes) and carpool choices before and after the HOT lane installation, and trip patterns, as well as their personal demographic information. The retrieval rate of the survey, however, was low (about 5%) and a significant number of the retrieved surveys was not useable for developing statistical models due to missing values and multiple answers for the same question. Although this situation (low sample size) restricted this study from fully using respondents’ various behavioral responses before and after the HOT installation, the developed binary choice models applying classification trees and logistic regressions produced interpretable results that explain the commuters’ lane and mode choices.
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