I-205/Lammers Rd/Eleventh St. Interchange Project


I-205 provides direct access to th e western portion of the City of Tracy, a growing residential and commercial community and transportation hub in wester n San Joaquin County. I-205 primarily functions to channel commuter and freight traffic from the north (Stockton and Sacramento), east (Manteca, Oakdale, Sonora), and south (Modesto, Merced) to the Bay Area via Interstate 580 and the Altamont Pass.

The west Tracy area is served by a partial directional interchange at Eleventh Street and a full inte rchange at Grant Line Road. No interchange currently serves Lammers Road at I-205.

Without a new or modified inte rchange, traffic operations at Eleventh Street and Grant Line Road interchanges are expected to worsen over the next 20 years, as the Tracy community continues to grow to the north and west, in accorda nce with the adopted general plan.


The purpose of the project is to construct improvements to the I-205 interchange at or near La mmers Road and Eleventh Street which will:

  • Provide full access to both directions of I-205;
  • Improve traffic operations at other interchanges, and;
  • Accommodate forecasted traffic growth.


Estimated Total Project Cost: $86.1 million.

Funding is anticipated from:

  • STIP : $20.0 million
  • Measure K: $20.0 million
  • Federal Reauthorization Program: $30.0 million
  • Development Fees: $16.1 million


  • January 2008               Environmental Studies Started
  • Spring 2010                 Draft Environmental Document released
  • Spring 2010                 Public Hearing
  • Summer 2010              Public Review Period Closes – Comments Due
  • Fall 2010                     Final Environmental Document Approved
  • 2010-2012                   Final Design
  • 2011-2013                   Right of Way Acquisition
  • T.B.D.                         Construct Interchange Modifications


This project is developed through a partnership between the City of Tracy, the San Joaquin Council of Governments (SJCOG) and the California Department of Transportation (Caltrans). Caltrans is the lead agency during the Project Approval & Environmental Document (PA&ED) process. Preparation of Plans, Specifications and Estimates (PS&E) and Project Construction phases would be by the City of Tracy. Right-of-Way (R/W) acquisition would be by Caltrans.


Project Information:

Sam Sherman, CalTrans District 10 Project Manager
1976 Dr. Martin Luther King Jr. Boulevard
Stockton, CA 95205
Phone: (209) 948-7889
E-mail: sam.sherman@dot.ca.gov

Kevin Sheridan, SJCOG Project Manager
Phone: (209) 468-3913
E-mail: sheridan@sjcog.org

Environmental Information:

Gail Miller, CalTrans District 6 Branch Chief
Phone: (559) 243-8274 or (209) 948-3646
E-mail: gail.miller@dot.ca.gov

Media Inquiries:

District 10 Public Information Office
Skip Allum, Public Information Officer
1976 Dr. Martin Luther King Jr. Boulevard
Stockton, CA 95205
Phone: (209) 948-7176
E-mail: district10publicaffairs@dot.ca.gov

Nicole Gorham, SJCOG Public Information Officer
Phone: (209) 235-0582
E-mail: gorham@sjcog.org



District 10 Twitter Feed

Contact Information

General Information:

Phone: (209) 948-7543
Public Information Office:
(209) 948-7977
Fax: (209) 948-3895
Email: District 10 PIO

Physical Address:

California Department of Transportation
District 10
1976 East Dr. Martin Luther King Jr. Blvd.
Stockton, CA 95205

Connect With Us


Caltrans Logo