Friday September 12, 2014

Caltrans, the Solano Transportation Authority (STA), and the Napa County Transportation and Planning Agency (NCTPA) announced the completion of major construction and the opening of all traffic lanes today of the much-anticipated State Route 12 (SR-12) Jameson Canyon Road Widening Project. The overall project doubles the highway width from two to four lanes along the six-mile route from State Route 29 in Napa County to Red Top Road near Interstate 80 in Solano County.

In the meantime, crews will continue minor work including painting, landscaping, and shoulder work which may require some intermittent lane closures.

“Truckers, businesses, and motorists will all benefit from this highway improvement project, which eases traffic congestion and makes the route safer for everyone,” said Caltrans Director Malcolm Dougherty.

State Route 12 links the Napa Valley, Sacramento Valley and several Bay Area counties, and widening it will reduce traffic congestion for about 35,000 motorists who travel SR-12 daily – and enable emergency responders to reach their destination faster.

In addition, a new six-mile-long concrete median barrier was constructed in the center of the highway to increase safety. The new safety feature will save lives and reduce injuries by preventing vehicles from drifting into traffic coming from the opposite direction.

The $127 million project received $55 million from Proposition 1B, a 2006 voter-approved transportation bond. To date, more than $17 billion in Proposition 1B funds have been put to work statewide for transportation purposes.

“Caltrans is committed to improving mobility throughout California,” said Caltrans District 4 Director Bijan Sartipi. “This commitment includes partnering with local transportation agencies to provide new solutions for North Bay commuters.” The upgrades on SR-12 in Jameson Canyon are part of an ongoing effort to improve the transportation infrastructure in Solano and Napa counties.

John Dunbar of the NCTPA, and Mayor of Yountville stated that “the Jameson Canyon Widening Project will significantly reduce congestion and create new economic opportunities between Napa and Solano counties, bringing visitors and new jobs to the north bay.”

"Twenty years in the making, this project is a great example of the transportation improvements that can be accomplished through regional partnership, from funding and right-of-way acquisition to design and construction,” said Jim Spering, MTC Commissioner and Solano County Supervisor.”

In June, Caltrans, the Solano Transportation Authority and the Metropolitan Transportation Commission broke ground on a project that is making major improvements to the Interstate 80/Interstate 680/SR-12 interchange.

And last July, a new $100 million truck complex opened along eastbound Interstate 80 near Fairfield in Solano County. The state-of-the-art facility fast-tracks inspections for more than two million trucks annually that travel from the Port of Oakland on I-80 through Northern California.

For more information on the SR-12 Jameson Canyon Widening Project, and the hundreds of ongoing transportation projects in the Bay Area, visit