SR 12 Widening: Jameson Canyon

SR 12 Widening: Jameson Canyon
By Janet Adams

The Solano Transportation Authority in partnership with Caltrans and the Napa County Transportation and Planning Authority (NCTPA) are working together to deliver the Phase 1 Jameson Canyon improvement project on State Route (SR) 12.

The existing SR 12 has one lane in each direction with no median barrier. It has sections that do not meet current highway standards and consistently maintains a poor level of service in many sections. This Phase 1 Project will widen approximately 6 miles of SR 12 from two (2) to four (4) lanes and construct a concrete median barrier. With a recent series of significant events,the $139 million Phase 1 project is fully funded with construction expected to begin in 2010. Primary funding for this project is from $74 million Proposition 1 B Corridor Mobility Improvement Account (CMIA), $49 million State Transportation Improvement Program (STIP) programmed by the three partnering agencies, $7 million Traffic Congestion Relief Program (TCRP), and $9 million in federal funds.