Representing pedestrian activity in travel demand models: Framework and application
There have long been calls for better pedestrian planning tools within travel demand models, as they have been slow to incorporate the large body of research connecting the built environment and walking behaviors. Most regional travel demand forecasting performed in practice in the US uses four-step travel demand models, despite advances in the development and implementation of activity-based travel demand models. This paper introduces a framework that facilitates the abilities of four-step regional travel models to better represent walking activity, allowing metropolitan planning organizations (MPOs) to implement these advances with minimal changes to existing modeling systems. Specifically, the framework first changes the spatial unit from transportation analysis zones (TAZs) to a finer-grained geography better suited to modeling pedestrian trips. The MPO's existing trip generation models are applied at this spatial unit for all trips. Then, a walk mode choice model is used to identify the subset of all trips made by walking. Trips by other modes are aggregated to the TAZ level and proceed through the remaining steps in the MPO's four-step model. The walk trips are distributed to destinations using a choice modeling approach, thus identifying pedestrian trip origins and destinations. In this paper, a proof-of-concept application is included to demonstrate the framework in successful operation using data from the Portland, Oregon, region. Opportunities for future work include more research on the potential routes between origins and destinations for walk trips, application of the framework in another region, and developing ways the research could be implemented in activity-based modeling systems.
- Record URL:
- Record URL:
-
Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/09666923
-
Supplemental Notes:
- Abstract reprinted with permission of Elsevier.
-
Authors:
- Clifton, Kelly J
- Singleton, Patrick A
-
0000-0002-9319-2333
- Muhs, Christopher D
- Schneider, Robert J
- Publication Date: 2016-4
Language
- English
Media Info
- Media Type: Web
- Features: Figures; References; Tables;
- Pagination: pp 111-122
-
Serial:
- Journal of Transport Geography
- Volume: 52
- Publisher: Elsevier
- ISSN: 0966-6923
- Serial URL: http://www.elsevier.com/locate/jtrangeo
Subject/Index Terms
- TRT Terms: Built environment; Mode choice; Nonmotorized transportation; Pedestrians; Travel demand; Walking
- Geographic Terms: Portland (Oregon)
- Subject Areas: Pedestrians and Bicyclists; Planning and Forecasting;
Filing Info
- Accession Number: 01599415
- Record Type: Publication
- Files: TRIS
- Created Date: May 20 2016 3:52PM