Reference : Calibrating Activity-Based Models with External OD Information: Overview Of Different...
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Civil engineering
Business & economic sciences : Special economic topics (health, labor, transportation…)
http://hdl.handle.net/2268/134302
Calibrating Activity-Based Models with External OD Information: Overview Of Different Possibilities
English
Cools, Mario mailto [Universiteit Hasselt - UH > > > >]
Moons, Elke [Universiteit Hasselt - UH > > > >]
Wets, Geert [Universiteit Hasselt - UH > > > >]
2010
Proceedings of the 89th Annual Meeting of the Transportation Research Board (DVD-ROM)
Transportation Research Board of the National Academies
Yes
No
International
Washington
DC
89th Annual Meeting of the Transportation Research Board
10-01-2010 to 14-01-2010
Transportation Research Board of the National Academies
Washington
DC
[en] Many practitioners question the advantages of activity-based models over conventional four-step models in terms of replication of traffic counts. Therefore, in this paper, a framework is highlighted that actively links travel demand models in general, and activity-based models in particular, with traffic counts. Two approaches are presented that calibrate activity-based models with traffic counts, namely an indirect and a direct approach. The indirect approach tries to incorporate findings, based on the analysis of traffic counts, into the model components of the activity-based models. The direct approach calibrates the parameters of the travel demand model in such a way that the model replicates the observed traffic counts (quasi-)perfectly. A practical example is provided to illustrate the direct approach. The study area for this practical example is Hasselt, a Belgian city of about 70,000 residents, and its surrounding municipalities. The practical examples revealed that there is not a single roadway to success in calibrating activity based models, but that different options exist in fine-tuning the activity-based model. Notwithstanding, it is important to recognize some open issues and avenues for further research. First, it is not always appropriate to assume that traffic counts are completely correct. Setting up some belief-structure might increase the responsiveness of the activity-based model. In addition, the OD-matrix calibration that optimizes the correspondence between estimated and observed screen-line counts could negatively impact the correspondence to other measures such as vehicle miles traveled. To conclude, formulation of a multi-objective calibration method is a key challenge for further research.
Lepur : Centre de Recherche sur la Ville, le Territoire et le Milieu rural ; LEMA - Local Environment Management and Analysis
Researchers ; Professionals ; Students ; General public ; Others
http://hdl.handle.net/2268/134302

File(s) associated to this reference

Fulltext file(s):

FileCommentaryVersionSizeAccess
Open access
TRB-Paper 10-1541 - Calibrating Activity-based Models With External OD Information.pdfAuthor postprint243.99 kBView/Open

Bookmark and Share SFX Query

All documents in ORBi are protected by a user license.