Project Overview

PECAS stands for Production, Exchange, and Consumption Allocation System. The PECAS Project is a collaboration between the University of California and Caltrans to develop models for spatial economic analysis and prediction. The project is currently funded by the California Department of Transportation, the William & Flora Hewlett Foundation, the Surdna Foundation and the Rockefeller Foundation through 2010. Learn more about the project team on the project participants page.

The California Statewide Interregional Integrated Model, known as CalSIIM, integrates transportation, economic, demographic, and land use information to predict the exchange of goods and services across space and time. In addition to the CalSIIM project, PECAS and its components are currently being applied in the development of state-wide transportation land use modeling systems for Ohio and Oregon, in the development of an urban land use model for Sacramento and in the anticipated development of urban land use models of Calgary and Edmonton in Canada. It is also being used as the basis for a recommended design for a model of the Los Angeles Region.

CalSIIM Peer Consulting Team Meets in San Francisco

March 25, 2010

Members of the CalSIIM Peer Consulting Team convened in downtown San Francisco today to review the latest updates to the Statewide Interregional Integrated Land Use, Transportation and Economic model being developed at the Urban Land Use and Transportation Center (ULTRANS), part of UC Davis’ Institute of Transportation Studies. Team members represent modelers from Metropolitan Policy Organizations throughout the state, as well as representatives from the California Energy Commission, the California Air Resources Board, Caltrans and Oregon’s Department of Transportation.

Meeting participants were briefed on the road networks and socio economic data that will be used in the refined travel model; as well as improvements in the general plan data sets, local effects data sets, floor space targets and construction costs that will be used in the statewide PECAS model.

Funding for this model is provided by the California Department of Transportation, along with generous development support from the William and Flora Hewlett Foundation, the Surdna Foundation and the Rockefeller Foundation.

Additional information and presentations from this meeting can be found at the California Statewide PECAS Model website, http://pecas.ultrans.ucdavis.edu/

CalSIIM Peer Consulting Team Meets in Los Angeles

November 18, 2009

Members of the CalSIIM Peer Consulting Team convened in Los Angeles on November 18th to review the latest updates to the California Statewide Integrated Land Use, Transportation and Economic model being developed at the Urban Land Use and Transportation Center in the UC Davis Institute of Transportation Studies. Team members include Metropolitan Policy Organization modelers from throughout the state, as well as representatives from the California Energy Commission and Oregon’s Department of Transportation.

Meeting participants were briefed on the refined travel model, updates to the land use zones (LUZ) and transportation analysis zones (TAZ) systems, modified highway networks, software for the Space Development (SD) module, and the introduction of a new modeling design diagram.

The California Statewide Integrated Land Use, Transportation and Economic model is funded by the California Department of Transportation along with generous development support from the William and Flora Hewlett Foundation, the Surdna Foundation and the Rockefeller Foundation.

Additional information and presentations from this meeting can be found at the California Statewide PECAS Model website's library, http://pecas.ultrans.ucdavis.edu/library.

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