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

Project Facts


The City of Tracy proposes to construct a new interchange, freeway auxiliary lanes and connecting roadway network at the junction of Route 205 and Lammers Road in San Joaquin County. The interchange would be located a minimum of one mile between the existing interchanges at Eleventh Street (formerly Old US 50)/Route 205 and Grant Line Road/Route 205. The new roadway segment would extend Lammers Road south from Byron Road, north of a proposed extension of Grant Line Road, and would cross Route 205 with a grade separated interchange, extending south to the existing intersection of Lammers Road/Eleventh Street in the City of Tracy.

Project Benefits

The proposed project would provide a new connection to Route 205 to serve the increase in forecasted traffic demand at surrounding interchanges. The Lammers Road interchange would improve accessibility to and from Route 205, thereby reducing motorist dependency and congestion at the adjacent Route 205 interchanges at Eleventh Street, Naglee Road and Grant Line Road. In addition, the proposed project would improve regional mobility by connecting a planned regional arterial with Route 205. This connection would provide alternative routes to Route 205 for local traffic.

Funding Breakdown

Item Subtotal Cost
Roadway Items $49,400,000
Structure Items $14,300,000
Right of Way $6,881,000
Total Project Cost $70,581,000

Project Schedule

  • 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 Contacts

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:

Jennifer Lugo, CalTrans District 6 Branch Chief 
Phone: (559) 779-6612
E-mail: Jennifer.lugo@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


Fact Sheet (DOCX)

Draft Environmental Impact Report/Environmental Assessment (PDF)

Draft Relocation Impact Statement (July 2011) Errata, September 2011 (PDF) 

Historic Property Survey Report (September 2010) Errata, September 2011 (PDF)

Historic Property Survey Report Supplemental (PDF)

Visual Impact Assessment (February 2011) (PDF)

Air Quality Study Report (February 2011) (PDF)

Noise Study Report (June 2010) (PDF)

Noise Abatement Decision Report (January 2011) (PDF)

Final Traffic Operations Report (May 2009) (PDF)

Water Quality Assessment Report (April 2010) (PDF)

Paleontological Identification Report (July 2010) (PDF)

Preliminary Drainage Report (May 2010) (PDF)

Location Hydraulic Study Form (PDF)

Preliminary Geotechnical Report (April 2010) (PDF)

Initial Environmental Site Assessment (October 2009) (PDF)

Natural Environment Study (February 2011) (PDF)

Public Information Meeting (PDF)

Public Meeting Report (PDF)

Public Hearing (PDF)