01025450

Component

https://doi.org/10.3141/1964-19

http://scholar.google.com...sani&publication_year=2006

Subarea analysis capability is needed in conjunction with dynamic network analysis models to allow consideration and rapid evaluation of a large number of scenarios and to support transportation network planning and operations decisions for situations that may not require analysis on a complete network representation. With a focus on how to provide an up-to-date time-dependent origin–destination (O-D) demand matrix for the subarea network, a two-stage subarea demand estimation procedure is described. The first stage uses path-based traffic assignment results from the original network to generate an induced O-D demand matrix for the subarea network. The second stage incorporates an iterative bilevel subarea O-D updating procedure to find a consistent network flow pattern, using the induced O-D demand information and archived traffic measurements in the subarea network. An excess-demand traffic assignment formulation is adopted to model the external trips that traverse or bypass the subarea network. This formulation allows vehicular flow to respond to traffic conditions resulting from network and operational changes in the subarea, and it can be adequately interpreted in an entropy maximization framework. The proposed procedure is illustrated in a case study using the Los Angeles subarea network extracted from the Southern California Association of Governments regional transportation planning network.

01037567

English

pp 176-184

2006

Transportation Research Record: Journal of the Transportation Research Board

0309099730

Print

Figures (5) ; References (16) ; Tables (2)

Case studies; Dynamic traffic assignment; Entropy (Communications); Mathematical models; Network analysis (Planning); Origin and destination; Regional planning; Traffic estimation; Travel demand

Subarea analysis

Los Angeles (California)

Highways; Planning and Forecasting; I72: Traffic and Transport Planning

TRIS, TRB, ATRI

Mar 3 2006 10:43AM

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