Examining the potential for car-shedding in the Greater Dublin Area

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Title: Examining the potential for car-shedding in the Greater Dublin Area
Authors: Carroll, Páraic
Caulfield, B. (Brian)
Ahern, Aoife
Permanent link: http://hdl.handle.net/10197/9592
Date: Dec-2017
Online since: 2019-01-16T11:54:49Z
Abstract: A free version of this paper is available at:  https://authors.elsevier.com/c/1W0423Rd3ug61Huntil the 26th December.  This paper examines the receptivity of a sample of commuters within the Greater Dublin Area (GDA) to a range of policy incentives that encourage travellers to make more sustainable usage of their private car. Several policy measures are evaluated to identify a means of stimulating a shift from single occupancy vehicle (SOV) use to modes that make sustainable usage of the car, namely carpooling and car-sharing. Consequently, an indication of increased levels of ¿car-shedding¿ in the GDA is ascertained. Behavioural indicators such as market elasticities and simulation models are estimated from multinomial logit (MNL) modelling of choices from a stated preference (SP) survey. The analysis determined that reductions in the modal share of SOVs of up to 8% in a ¿best case scenario¿, could be achieved if policies are put in place to reduce the time and cost attributes of commuting to work by carpooling and car-sharing. Furthermore, a 1% change in the convenience, time and cost attributes yielded a direct effect or increase in the probability of carpooling and car-sharing being chosen, of up to 0.34%, suggesting that the carpool and car-share modes may be relatively elastic to attribute changes. A comparison of means analysis of other survey data is also included in this paper. Ultimately, this paper offers support to the argument that greater investment in policy incentives alone is worth considering in order to increase the occupancy of vehicles commuting to work and education.
Funding Details: Environmental Protection Agency
Type of material: Journal Article
Publisher: Elsevier
Journal: Transportation Research Part A: Policy and Practice
Volume: 106
Start page: 440
End page: 452
Copyright (published version): 2017 Elsevier
Keywords: Car-sheddingStated preferenceTravel behaviour changeMode choicePolicy incentives
DOI: 10.1016/j.tra.2017.10.019
Language: en
Status of Item: Peer reviewed
Appears in Collections:Civil Engineering Research Collection

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