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Validating an Interregional Travel Model: A Case Study in California Nicholas J. Linesch Giovanni Circella Urban Land Use and Transportation Center Institute.

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Presentation on theme: "Validating an Interregional Travel Model: A Case Study in California Nicholas J. Linesch Giovanni Circella Urban Land Use and Transportation Center Institute."— Presentation transcript:

1 Validating an Interregional Travel Model: A Case Study in California Nicholas J. Linesch Giovanni Circella Urban Land Use and Transportation Center Institute of Transportation Studies University of California, Davis TRB Planning Applications – 2011.05.08

2 Modeling

3 InputsModelsOutputs Zone System Short Distance Personal Travel Model (SDPTM) Road Network Transit Network Population Employment Other Zonal Properties Long Distance Personal Travel Model (LDPTM) Short Distance Commercial Vehicle Model (SDCVM) Long Dist. Commercial Vehicle Model (LDCVM) External Travel Model (ETM) Loaded Network Travel Times and Costs Summary Travel Statistics Maps Graphs Trip Tables Trip Lists

4 Data Flows Data collection Data processing Data management Data distribution Feedback and assessment DataInformationKnowledge *Idea from Russell Ackoff

5

6

7 MPO Interregional Long Distance 16.6%16.2% Definition: A long distance trip in the CSTDM is one that is greater than 100 miles *>50 miles for commercial vehicles Definition: An MPO interregional trip is any trip that crosses an MPO boundary

8

9

10 Truck Stations TSN Stations PeMS Detectors Statewide Count Database 2008 WIM Stations

11 Theory

12

13 Model Validation: Counts vs. VMT?

14 Discussion Can VMT be used for further model validation? Is this strategy of VMT estimation helpful for policy involving GHG reduction strategies?

15 Nicholas J. Linesch njlinesch@ucdavis.edu Modeler, Graduate Student Urban Land Use and Transportation Center University of California, Davis Thank you

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