General Contact Number: (530) 621-5567

Travel Demand Model

Travel Demand Model (TDM) Phase II

A Travel Demand Model (sometimes referred to as a Traffic Demand Model) is a tool for analyzing the impacts of development on the transportation system. The County’s previous travel demand model was based on a software platform with limited capability that is no longer supported.

The newly developed Travel Demand Model is essential for:

  • Implementing General Plan goals
  • Updating the Zoning Ordinance
  • Planning of new roadways for the Capital Improvement Program.
  • Updating Traffic Impact Mitigation Fees

The new travel demand model will help guide the County through the next twenty-five years of land use planning. The new model will be used not only by the County but also by private companies and public agencies such as Caltrans. The County intends to keep the model current, updating it as needed to incorporate new development.

Background Information


Board of Supervisors Agenda Items

Date Item File ID Ver. Description








Supporting Documents

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If you have questions on the Travel Demand Model project, please contact:

Claudia Wade
Senior Civil Engineer
(530) 621-5977 Direct
(530) 621-4650 Main
Natalie Porter
Traffic Engineer
(530) 621-5442 Direct
(530) 621-4650 Main