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Thurston Regional Planning Council (TRPC) Travel Model Peer Review Report

Appendix D Overview of Thurston Regional Planning Council TDFM

The following text summarizes the current version of the TRPC model at the time of the review, along with data sources used in the development of the model.

D.1 Thurston Regional Planning Council Model Components

The following sections summarize models components as described in the current model documentation.[10] The trip-based model is made up of four primary modules with relatively sophisticated submodels and feedback as shown in Figure 2 and described below.

The figure provides a flow chart of the general modeling structure of the TRPC model. The flow chart describes the data and processes involved in each step of the modeling process.

Figure 2: General Modeling Structure of TRPC Model[12]

D.2 Other Relevant Aspects of Thurston Regional Planning Council Model

D.2.1 Transit Modeling

D.2.2 Commercial Travel

D.2.3 External Travel

D.3 Thurston Regional Planning Council Model Validation

D.4 Thurston Regional Planning Council Current Model Data Sources

D.4.1 Household Survey

D.4.2 Demographic and Census Data

D.4.3 Transit Counts

D.4.4 Traffic Volume Data

D.4.5 Travel Time and Speed Data

D.4.6 Truck Data

D.4.7 External Surveys

D.4.8 GIS Data

This document is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The United State Government assumes no liability for its contents or use thereof.

The United States Government does not endorse manufacturers or products. Trade names appear in the document only because they are essential to the content of the report.

The opinions expressed in this report belong to the authors and do not constitute an endorsement or recommendation by FHWA. 

This report is being distributed through the Travel Model Improvement Program (TMIP).


[10] Ren, Jin. Thurston Region Multimodal Travel Demand Forecasting Model Implementation in EMME/2. 15th International EMME/2 Users' Group Conference, Sept. 18, 2000.

[11] TRPC. Travel Model Improvement Program (TMIP) Peer Review Meeting--Review of Proposed TRPC Model Improvements. Presentation for the Peer Review. June 11, 2012. Slide 54

[12] Thurston Regional Planning Council. Thurston Region Multimodal Travel Demand Forecasting Model Development. 2000. p. 3

[13] Ren, Jin. Thurston Region Multimodal Travel Demand Forecasting Model Implementation in EMME/2. 15th International EMME/2 Users' Group Conference, Sept. 18, 2000. p. 28

Updated: 03/28/2014
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