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Southern California Association of Governments

Welcome to SCAG

SCAG is the nation's largest metropolitan planning organization, representing six counties, 191 cities and more than 18 million residents. SCAG undertakes a variety of planning and policy initiatives to encourage a more sustainable Southern California now and in the future. More About SCAG >
Southern California Association of Governments

Member Services

SCAG maintains an active model and data distribution function for member agencies and other stakeholders. SCAG provides modeling data to support stakeholders' planning programs and to assist in the development and maintenance of city and subregional models. SCAG provides modeling data services to member agencies, universities, and other public agencies by providing model setups, model input data, and model results.
SCAG’s model and data distribution program is designed to promote model consistency, encourage sharing of model data between agencies, and greatly reduce costs for participating agencies. The use of models and data provided by SCAG helps ensure that local planning assumptions and modeling activities are consistent with SCAG’s models and growth assumptions. This helps to ensure that resulting local plans are consistent with SCAG’s plans and guarantees that local planning input can feed seamlessly into the regional planning process. SCAG provides requestors off-the-shelf information and/or data requiring further assistance for SCAG to process and extract. In addition, for subregional model development and for large regional initiatives, SCAG provides model setups and documentation required for the requestor to setup and conduct modeling analysis.

Requesting Model Data

To request model data, requestors are asked to complete the Model Data Request Form. Please be specific on the data requested, horizon years, and purpose of the request. For additional information about SCAG’s Model, please see the following report: SCAG Regional Travel Demand Model and 2008 Model Validation. Also see Proper Use of Model Data for additional background information regarding the proper use of model data obtained from SCAG.
For questions concerning model data requests and/or to return the completed Data Request Form, please contact Cheryl Leising at (213) 236-1926 or email at