Isles of Scilly

Travel Demand Study

Marco Kouwenhoven, Charlene Rohr, Stephen Miller, Hidde Siemonsma, Peter Burge, James Laird

ResearchPublished May 29, 2007

Submissions for capital funding to improve transport infrastructure requires estimates of the cost benefits travellers will receive from those improvements. This study provides an example of how a travel demand model was used to predict travellers’ responses and quantify their benefits from different ferry service options to the Isles of Scilly. This model has been developed using locally collected data, including travellers’ observed choices and the stated choices they say they would make under changed circumstances. The model predicts changes in modal shift and in total travel demand as a result of changes in ferry services. The methodology also provides an enhancement to normal UK transport appraisal procedures. It includes travellers’ benefits from improved quality of services and scheduling and exact consumer surplus calculations, which allow for variation in travellers’ tastes and the possibility of calculating the impact of discontinuation of services.

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Kouwenhoven, Marco, Charlene Rohr, Stephen Miller, Hidde Siemonsma, Peter Burge, and James Laird, Isles of Scilly: Travel Demand Study. Santa Monica, CA: RAND Corporation, 2007. https://www.rand.org/pubs/technical_reports/TR367.html.
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