Travel Demand Model (TDM) Phase I

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

Background

Traffic Demand Model Needs Assessment
Down Right Arrow

On December 19, 2011 the Board of Supervisors received a Traffic Demand Model Needs Assessment. The assessment highlighted areas where the existing model could be improved.

Traffic Demand Model Update

Down Right ArrowFollowing the Needs Assessment, on January 24, 2012 the Board of Supervisors authorized the update of the Traffic Demand Model through a contract with Kimley-Horn and Associates, Inc.

Summary Scope of Work

The update includes the following scope of work:

  • Update the existing travel demand model with current traffic and population data
  • Complete the Environmental Impact Analysis for Targeted General Plan Amendment and Zoning Ordinance Update
  • Incorporate the revised Land Use Forecast into the new Travel Demand Model

​Board of Supervisors Agenda Items

Please note: These agenda items may not reflect the most current information and are subject to change. For the latest information on agenda items related to this project, refer to the County online agenda calendar: https://eldorado.legistar.com


DateItemFile IDVer.Description
12/19/2011 411-14411

Department of Transportation recommending the Board receive an update and provide direction on the Traffic Model Update. Funding: 2004 General Plan Traffic Impact Mitigation (TIM) Fee Program

1/24/20123611-14412

Chief Administrative Office recommending the Board authorize the Purchasing Agent to execute Agreement 396-S1211 with Kimley-Horn and Associates, Inc. to update the County’s current Traffic Model for an amount not to exceed $379,495 for a two year term, upon review and approval by County Counsel and Risk Management. (Cont'd 12/19/11, Item 4)

02/27/2012212-02671

Chief Administrative Office providing a status report and requesting discussion and direction on the Land Use Policy Programmatic Update (LUPPU) including the following: 1) Targeted General Plan Amendment; 2) Housing Element Amendment; 3) Zoning Ordinance Update; and 4) Travel Demand Model Update.

04/16/2012212-04751

Chief Administrative Office recommending the Board review and comment on the Traffic Model Update major assumptions as shown in Attachment A that will be used to establish Achievable Development, 2025 No-Project, and 2035 Project/No Project land use forecasts for use in updating the El Dorado County Travel Demand Model as described in the Kimley-Horn & Associates, Inc.’s Technical Memorandum #10: Land Use Assumptions.

05/01/20123912-04752

Chief Administrative Office recommending the Board review and comment on the Travel Demand Model Update major assumptions as shown in Attachment A that will be used to establish Achievable Development, 2025 No-Project, and 2035 Project/No Project land use forecasts for use in updating the El Dorado County Travel Demand Model as described in the Kimley-Horn & Associates, Inc.’s Technical Memorandum No. 10: Land Use Assumptions. (Cont'd 4/16/12, Item 2)

06/26/20124612-04753

Chief Administrative Office recommending the Board review and comment on the Roadway Network Map and Traffic Analysis Zone Map (Attachments 3A & 3B) for use in updating the El Dorado County Travel Demand Model. (Refer 5/1/12, Item 39)

09/25/20124312-04755

Chief Administrative Office recommending the Board provide direction on roadway parameters to be analyzed with the Travel Demand Model

03/05/2013711-14413

Chief Administrative Office recommending the Board authorize the Purchasing Agent to execute Amendment I to Agreement for Services No. 396-S1211 with Kimley-Horn and Associates, Inc., revising the scope of services to add Component 4 which includes Task 4.1 - Rural Area Land Use Forecast, Optional Task 4.2 - Land Use Forecast Revision and Model Analysis, Optional Task 4.3 - Meetings and Documentation, and Optional task 4.4 - Additional Presentations, and increasing the contract amount by $72,042.50 for a total contract amount of $451,537.50. FUNDING: Traffic Impact Mitigation (TIM) Fees, Road Fund, and General Fund.

03/25/2013512-04756

Chief Administrative Office providing a presentation on the Travel Demand Model.

03/18/2014611-14415

Community Development Agency, Long Range Planning, recommending the Board approve and authorize the Purchasing Agent to sign Amendment III to Agreement for Services No. 396-S1211 with Kimley-Horn and Associates, Inc. for Travel Demand Model creation and update services, expanding the scope of work and increasing the not-to-exceed amount of the Agreement by $16,000 for a new not-to-exceed total amount of $501,477, and extending the term of the Agreement to December 31, 2015, contingent upon review and approval of the Amendment by County Counsel and Risk Management. FUNDING: The total contract is funded by a combination of Traffic Impact Mitigation Fees, Road Fund, and General Fund. Amendment III is specifically funded by the General Fund (no Federal Funding).

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

Claudia Wade
Senior Civil Engineer
claudia.wade@edcgov.us
(530) 621-5977 Direct
(530) 621-4650 Main
Natalie Porter
Traffic Engineer
natalie.porter@edcgov.us
(530) 621-5442 Direct
(530) 621-4650 Main







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