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Project Fact Sheet

The State Route 108 East Route Adoption is a high-priority corridor for Stanislaus County and its incorporated cities. The primary intent of the project is to replace the existing State Route 108 and provide a high-capacity and high-speed expressway to accommodate anticipated traffic growth in northern Stanislaus County, to alleviate traffic on parallel roadways, to accommodate multi-modal travel, to provide interregional connectivity, and to provide for economic growth.

The current State Route 108 near Modesto, Riverbank, and Oakdale does not provide an adequate east-west transportation facility for efficient, reliable and continuous interregional travel. Existing State Route 108 functions as a local road passing through the congested downtown areas of Riverbank and Oakdale. The addition of truck, recreational, and commuter traffic using State Route 108 add to the congestion of these locals roads. A significant increase in local and interregional traffic demand is expected in the coming years. Local agencies are now planning for future development in this area and would like to plan a corridor for the future state interregional/expressway facility.

To plan for the expressway, the North County Corridor Transportation Expressway Authority was formed. The Authority consists of the Stanislaus Council of Governments (StanCOG); the cities of Oakdale, Riverbank, Modesto; and the County of Stanislaus.
The California Department of Transportation (Caltrans) as the lead agency for the California Environmental Quality Act, in cooperation with the North County Corridor Transportation Expressway Authority, is in the initial stages of the Project Approval and Environmental Development (PA&ED). Caltrans is preparing a California Environmental Quality Act (CEQA) program environmental impact report for the route adoption. The next public meetings are planned for the Summer 2009 and will be one of many opportunities for members of the public to be involved and provide comments or concerns.

The current project phase will result in selecting a preferred corridor approximately 2000 feet wide, and broad environmental clearance for the California Transportation Commission to approve the Route Adoption and designate the facility as an interregional route. Two alternative corridors have been identified: Alternative A - Southern Corridor, and Alternative B – Northern Corridor. Both corridors would extend approximately 18 miles from a location on State Route 108 west of the City of Riverbank in the vicinity of the intersection of SR 219 (Kiernan Avenue) and McHenry Avenue to a location on State Route 120 /108 approximately six miles east of the City of Oakdale. The original project study area was defined by a previous Feasibility Study and a Preliminary Design Report in Spring 2008. Since that time the project limits were revised to begin as described above. Designation of the new State Route 108 is the first step in the development of the proposed project.

Funding for this phase of the project is being provided by the California Transportation Commission along with regional transportation impact fees. The Authority is also asking for State funding that was once part of the cancelled state Oakdale Bypass project.

Members of the public are welcome to provide comments, questions, or concerns to Gail Miller, Senior Environmental Planner, Caltrans, 2015 East Shields Avenue, Suite 100, Fresno, CA 93726 ,by e-mail to, or by calling (559) 243-8274. Also, the Project Manager, Christina Hibbard, can be contacted at or by calling (209) 948-7889.