STA Studies
Solano County Comprehensive Transportation Plan
The following studies have been incorporated into the Solano County Comprehensive Transportation Plan or are being completed:
Related Studies:
I-80/I-680/I-780 Major Investment & Corridor Study
 The Corridor Study analyizes existing highway capacity and usage along the I-80/I-680/I-780 corridor and prioritizes a list of Mid-Term Projects and Long-Term Projects into the year 2030.
The I-80/I-680/I-780 study corridor is divided into seven discrete segments, as listed
below. The study corridor was separated into these seven geographic segments
because they display distinct travel patterns and serve different travel markets.
Segment boundaries are typically comprised of major freeway to freeway interchanges.
Segment 1: I-80 from Red Top Road to SR-12 East
Segment 2: I-80 from the Carquinez Bridge to SR-37
Segment 3: I-780 from I-680 to I-80
Segment 4: I-680 from the Benicia Bridge to I-80
Segment 5: I-80 from SR-37 to Red Top Road
Segment 6: I-80 from SR-12 East to I-505
Segment 7: I-80 from I-505 to SR-113 North
Download the I-80/I-680/I-780 Corridor Study by section:
I-80/I-680/I-780 Transit Corridor Study
 The I-80/I-680/I-780 Transit Corridor Study analyzes existing transit services and demand, and provides short and long range transit plans for intercity express bus services and auxiliary facility improvements, such as direct access ramps to center median HOV lanes, park and ride, and transit center demand & site planning.
The I-80/I-680/I-780 Transit Corridor Study is organized as follows:
- Existing Intercity Bus Services
- Existing Park and Ride and Transit Center Facilities
- Corridor Travel Demands
- Corridor Express Bus Service Plan
- Highway Interface Element
- Implementation Strategy
Download the I-80/I-680/I-780 Transit Corridor Study (16.3 mb)
(Adopted on July 14, 2004)
Transit Consolidation
Over the past several years, the issue of consolidating some or all of the six city-operated Solano transit services has been discussed and proposed for study. This topic was discussed by the STA Board and they expressed interest and support for transit service becoming more convenient through a seamless system, delivering a reasonable level of service throughout the county, and addressing local transit issues and need.
The STA Board approved goals, objectives and evaluation criteria to be incorporated in the scope of work for this study. A consultant team, lead by DKS Associates, was selected to conduct a countywide Transit Consolidation Study which began in early 2007. The first phase of this study was to conduct extensive outreach with stakeholders. Consultants have completed nearly 60 interviews that have been held with STA Board members, public officials, transit staff, city staff, funding partners and others to identify their perspectives, issues, and concerns concerning potential transit consolidation. In addition, three rider focus groups were held.
Initial draft reports on the findings of current transit services, perspectives, and trends as well as a report presenting potential transit consolidation options are due for release in August 2007.
Solano County Senior and Disabled Transit Study
 The STA wishes to address the mobility needs of the rapidly growing senior and disabled population in the County. This study presents an analysis of the transportation barriers faced by these communities and provides strategies for addressing these barriers.
Download the Senior and Disabled Transit Study.
(2.3 mb)
(Adopted June 9, 2004)
The report is organized as follows:
- Demographic trends of seniors and people with disabilities
- Transportation resources currently available
- Community perspectives on transportation gaps
- Potential strategies to address these gaps
- Action Plan (5-Year and 30-Year Plans)
Cordelia Truck Scales Relocation Study
 This study identifies potential sites that could satisfactorily accomodate the relocation of the existing scales within the I-80/I-680/SR12 Interchange or at other sites in Solano County.
The Cordelia Truck Scales, located on I-80 between Suisun Valley Road and SR12 (East), were built in 1958 and are currently undersized. The scales significantly contribute to the congestion on I-80 due to the large number of trucks exiting and entering I-80 and the close proximity of the scales to both the Suisun Valley Road and I-80 interchanges.
Download the Cordelia Truck Scales Relocation Study (19.1 mb)
(Adopted February 16, 2005)
Download a Fact Sheet on the Truck Scales Relocation Project.
State Route 12 Highway Safety Effort
 Safety on SR 12 has been a priority for the STA Board for a number of years, but recent accidents and fatalities have increased the urgency to take immediate action. The STA, working closely with law enforcement agencies and Caltrans, has developed a multi-faceted strategy for improving safety and mobility on this important interregional highway route from Rio Vista to Suisun City and Fairfield. The four key elements of the program are enforcement, legislation, public education and signage, and engineering.
There were 6 fatalities on SR 12 in March 2007 alone. As of October 1, 2007, there have been a total of 9 fatalities on SR 12 between I-80 in Solano County and I-5 in San Joaquin County this year. The rate of fatalities and injury crashes is more than one and a half times the state average. The STA-sponsored Assembly Bill 112 (Wolk) creating a Safety Enhancement Double Fine Zone (DFZ) on this same stretch of SR 12 was approved by the legislature and signed into law on October 1, 2007. In addition to creating a DFZ on SR 12 beginning January 1, 2008, the law defines criteria for similar roadways and highways throughout the state to qualify for this designation as a Double Fine Zone.
The STA-sponsored Assembly Concurrent Resolution (ACR) 7 (Wolk), designating a two-mile section of SR 12 as the Officer David Lamoree Memorial Highway, was also approved. 26-year-old Rio Vista Police Officer Lamoree died as a result of a head-on collision on SR 12 in October, 2005. The STA is working with Caltrans to facilitate installing the signs on SR 12.
Click to view detailed reports and statistics on the SR 12 corridor.
State Route 12 Transit Corridor Study
 The State Route 12 Transit Corridor Study explains the operating environment, the existing transit service, and the potential demand for service along the State Route 12 Transit Corridor.
Three public meetings have provided public input for the transit study in Rio Vista, Fairfield, Suisun City, and Napa. Steering committee meetings made up of elected officials, planners, public works staff, transit operators, and other regional stakeholders are continuing to be held.
Download SR12 Transit Corridor Study materials:
State Route 12 Major Investment Study
 This study identifies the physical improvements and management practices necessary to appropriately serve future travel demand in the SR12 study corridor.
The study corridor includes the portion of SR 12 between Interstate 80 and the Rio Vista Bridge. State Route 12 is an important east-west route connecting Sonoma, Napa, Solano, Sacramento, San Joaquin and Calaveras Counties. A two to four-lane roadway in the study area, SR 12 contains a mixture of freeway, two-lane highway, expressway and arterial sections.
Download the State Route 12
Major Investment Study (26.2 mb)
(Adopted October 2001)
Oakland to Auburn Regional Rail Study
 This report documents a conceptual service plan and implementation strategy for provision of new regional rail (commuter) service in the urban corridor extending from Auburn to Oakland, California. The new service would augment existing Capitol Corridor intercity service by providing additional peak period capacity within the greater Sacramento urban area and between Sacramento and the Bay Area. The two services (Capitol Corridor and Regional Rail) would utilize the same equipment, staff, and fare structure, and thus would appear fully unified to the riding public.
Download the Oakland to Auburn Regional Rail Study (1.3 mb)
(September 2005)
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