Please use this identifier to cite or link to this item: http://hdl.handle.net/10077/6004
Title: Car sharing demand estimation and urban transport demand modelling using stated preference techniques
Authors: Catalano, Mario
Lo Casto, Barbara
Migliore, Marco
Keywords: Car sharingCar poolingStated PreferenceRandom Utility ModelsSustainable transport systems
Issue Date: 2008
Publisher: EUT Edizioni Università di Trieste
ISTIEE Istituto per lo studio dei trasporti nell’integrazione economica europea
Source: Mario Catalano, Barbara Lo Casto, Marco Migliore, "Car sharing demand estimation and urban transport demand modelling using stated preference techniques", in: European Transport / Trasporti Europei, XIV (2008) 40, pp. 33-50.
Series/Report no.: European Transport / Trasporti Europei
XIV (2008) 40
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 the
urban transport demand, allowing for the possibility of using innovative transport systems like car sharing
and car pooling.
In order to estimate the demand model parameters, a specific survey was carried out inside the urban
area of Palermo. The survey focused on the morning rush hour and involved mainly employees, selfemployed
workers and students (about 500 respondents) whose final destination was located within the
historical centre of the city. The questionnaires contained a stated preference experiment regarding the
choice among four different transport alternatives: private car, car pooling, car sharing and public
transport.
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 demand
model, 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. The
analysis highlighted that the car club market share could increase up to the 10% level, while car pooling
could slightly rise.
Type: Article
URI: http://hdl.handle.net/10077/6004
ISSN: 1825-3997
Appears in Collections:European Transport / Trasporti Europei (2008) 40/XIV

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