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dc.contributor.authorHillel, Timothyen
dc.contributor.authorGuthrie, Peteren
dc.contributor.authorElshafie, Mohammeden
dc.contributor.authorJin, Yingen
dc.date.accessioned2017-03-23T11:19:58Z
dc.date.available2017-03-23T11:19:58Z
dc.date.issued2016-06-29en
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/263173
dc.description.abstractTransport models for infrastructure investment and operations planning make use of generalised trip cost to predict travel choice decisions. In cities, the most important factors in the generalised cost is trip duration. When calibrating such models to achieve simulation fidelity, observed data such as the choice of destination and means of travel recorded in travel surveys are used in estimating model parameters. Ideally, observed travel durations should also be used in the model estimation. However, in the past it was infeasible to record the actual trip durations to any degree of accuracy in travel surveys. Trip durations derived from a transport network model were commonly assumed to be sufficiently representative. Increasing availability of better recorded trip durations from travel surveys and better modelled trip durations from online mapping present the promise of significant improvements in the fidelity of transport models. As a preamble to adopting such data, we investigate how the best developed recording of actual trip durations from the London Travel Demand Survey compares with the most advanced trip duration modelling from Google Map travel directions API. We find clear discrepancies between the two, with the discrepancies varying systematically for different means and purposes of travel. The magnitude of the discrepancies is greater than can be attributed to randomness or noise. The systematic nature of the discrepancies suggests that transport network modelling even in its advanced form still has a long way to go to represent the observed patterns of behaviour, particularly for non-commuting journeys which account for about 80% of all trips made in cities. Since the discrepancies may create a systematic bias in the model parameters, it is of critical importance to understand them better in future analysis.
dc.description.sponsorshipThis research is an update from Tim Hillel’s MRes thesis which was undertaken as part of the Future Infrastructure and Built Environment Centre for Doctoral Training at the University of Cambridge, which is funded by the UK Engineering and Physical Sciences Research Council (EPSRC).
dc.languageEnglishen
dc.language.isoenen
dc.publisherICE Publishing
dc.titleAssessing the discrepancies between recorded and commonly assumed journey times in Londonen
dc.typeConference Object
prism.endingPage764
prism.publicationDate2016en
prism.publicationNameTransforming the Future of Infrastructure Through Smarter Informationen
prism.startingPage759
dc.identifier.doi10.17863/CAM.7981
rioxxterms.versionAMen
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2016-06-29en
dc.contributor.orcidHillel, Timothy [0000-0001-6872-2235]
dc.contributor.orcidGuthrie, Peter [0000-0002-9523-3733]
dc.contributor.orcidElshafie, Mohammed [0000-0001-9908-5515]
dc.contributor.orcidJin, Ying [0000-0003-2683-6829]
rioxxterms.typeConference Paper/Proceeding/Abstracten
pubs.funder-project-idEPSRC (1549360)
pubs.conference-nameInternational Conference on Smart Infrastructure and Constructionen
pubs.conference-start-date2016-06-27en
rioxxterms.freetoread.startdate2017-06-21


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