![]() We retrieved the 2009 NHTS data with confidential block group level residence location (and Census Tract and ZIP code of workplace location), which is the ideal data set we eyed for modeling mode choice. Additional data sources include TTI’s Urban Mobility Report dataset and National Transit Database. The primary data sources we identified and used for Task 2 are the 2009 National Household Travel Survey (NHTS) and 2010 EPA Smart Location Database (SLD). ![]() Members of the TAC/OSA contract will review and suggest adjustments to the PSU researchers for model design, estimation data and results, validation data, approach and results guide the selection of the best model design. The deliverable of Task 2 is a working paper (this document) that describes model designs, data sources, estimation, results of sensitivity tests and validation documented R scripts used to process and analyze data. ODOT staff shall review and adjust the proposed designs, estimation data and validation data/approach. The PSU team will discuss and coordinate with Brian Gregor in the model design and estimation process, as he implements the RSPM common framework, to make sure the design and data format match the latest RSPM modeling framework. PSU researchers will also identify sensitivity tests to assess the upgraded model with literature elasticities, repeating some of the tests previously calculated by the RSPM to ensure these remain intact, as well as adding tests to evaluate the new functionality. The PSU team will suggest functional form and independent variables for model estimation with associated data sources for estimation and validation. These approaches build on the existing RSPM module and utilize household and land use inputs and budget constraints already embedded in the RSPM tool. ![]() More specifically, the plan is to select and estimate one or more possible designs of the mode choice model based on literature review and data exploration in Task 1 and to understand what mode shifts occur as vehicle travel is reduced, incorporating and testing interactions in RSPM. Task 2 of the project is to “select one or more possible model designs for RSPM mode shift, estimate model parameters and evaluate the designs and estimated parameters with sensitivity tests and validation”.
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