Car sharing demand estimation and urban transport demand modelling using stated preference techniques

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Abstract

The research deals with the use of the stated preference technique (SP) and transport demand modelling to analyse travel mode choice behaviour for commuting urban trips in Palermo, Italy.The principal aim of the study was the calibration of a demand model to forecast the modal split of theurban transport demand, allowing for the possibility of using innovative transport systems like car sharingand car pooling.In order to estimate the demand model parameters a specific survey was carried out inside the urbanarea of Palermo. The survey focused on the morning rush hour and involved mainly employees, selfemployedworkers and students (about 500 respondents) whose final destination is located within the historical centre of the city. The questionnaires contained a stated preference experiment regarding the choice between four different transport alternatives: private car, car pooling, car sharing and publictransport.A random utility model was developed by using data resulting from the SP experiment. We found out that, for the specific case of Palermo, the multinomial logit proved to be the best urban transport demandmodel, even if the choice set contained three car alternatives. We identified as main attributes affecting mode choice behaviour the one-way trip travel time and cost, the parking time, the number of cars available to each household member, the alternative specific attributes for the car option and the car sharing one.The model was applied to analyse the potential demand for car sharing and car pooling in Palermo,under a future scenario characterized by several policy actions for limiting private transport use. Theanalysis highlighted that the car club market share could increase up to the 10% level, while car poolingcould slightly rise.
Lingua originaleEnglish
pagine (da-a)33-50
Numero di pagine18
RivistaEUROPEAN TRANSPORT/TRASPORTI EUROPEI
Volume40
Stato di pubblicazionePublished - 2008

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