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A practical method to estimate the benefits of improved road network reliability: an application to departing air passengers

Kroes, Eric and Koster, Paul and Peer, Stefanie (2017) A practical method to estimate the benefits of improved road network reliability: an application to departing air passengers. Transportation. pp. 1-16. ISSN 0049-4488

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Abstract

This paper develops and applies a practical method to estimate the benefits of improved reliability of road networks. We present a general methodology to estimate the scheduling costs due to travel time variability for car travel. In contrast to existing practical methods, we explicitly consider the effect of travel time variability on departure time choices. We focus on situations when only mean delays are known, which is typically the case when standard transport models are used. We first show how travel time variability can be predicted from mean delays. We then estimate the scheduling costs of travellers, taking into account their optimal departure time choice given the estimated travel time variability. We illustrate the methodology for air passengers traveling by car to Amsterdam Schiphol Airport. We find that on average planned improvements in network reliability only lead to a small reduction in access costs per trip in absolute terms, mainly because most air passengers drive to the airport outside peak hours, when travel time variability tends to be low. However, in relative terms the reduction in access costs due to the improvements in network reliability is substantial. In our case we find that for every 1 Euro reduction in travel time costs, there is an additional cost reduction of 0.7 Euro due to lower travel time variability, and hence lower scheduling costs. Ignoring the benefits from improved reliability may therefore lead to a severe underestimation of the total benefits of infrastructure improvements.

Item Type: Article
Keywords: Value of reliability, Airport access, Accessibility, Travel time variability
Divisions: Departments > Sozioökonomie > Multi-Level Governance and Development
Version of the Document: Published
Depositing User: ePub Administrator
Date Deposited: 14 Mar 2017 15:27
Last Modified: 14 Mar 2017 15:54
Related URLs:
FIDES Link: https://bach.wu.ac.at/d/research/results/80116/
URI: http://epub.wu.ac.at/id/eprint/5463

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