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

Project Description

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.


Estimated 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


Current Schedule

Project Study Report (M010) January 2008
Project Approval & Environmental Document (M200) Fall 2010
Right of Way Certification (M410) 2011-2013
Ready to List (M460) To Be Determined
Approved Construction Contract (M500) To Be Determined
Project Completion (M600) To Be Determined



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 Contact

Caltrans District 10 - Public Information Office
Phone: (209) 948-7977
Email: district10publicaffairs@dot.ca.gov


Title VI Information

The California Department of Transportation (Caltrans) assures that no person shall, on the basis of race, color, or national origin, be excluded from participation in, be denied the benefits of, or be otherwise subjected to discrimination under any program or activity receiving Federal financial assistance, as required by Title VI of the Civil Rights Act of 1964, as amended, the Civil Rights Restoration Act of 1987, and Federal Executive Order 12898 (Federal Actions to Address Environmental Justice in Minority Populations and Low-Income Populations).

Caltrans will make every effort to ensure nondiscrimination in all of its programs and activities, whether they are federally funded or not, and that services and benefits are fairly distributed to all people, regardless of race, color, or national origin. In addition, Caltrans will facilitate meaningful participation in the transportation planning process in a nondiscriminatory manner.