Solano State Route 12 Pavement Preservation (04-0AA53)

The project, identified as Solano State Route 12 Pavement Preservation (04-0AA53), is a $37.388 million initiative by Caltrans District 4 – Bay Area/Oakland to perform comprehensive pavement preservation and safety enhancements along State Route 12 in Solano County, California, between postmiles 14.10 and 20.68. The work includes pavement dig-outs, cold planing, and application of hot mix and recycled hot mix asphalt overlays, along with installation of asphalt dikes, centerline and shoulder rumble strips, and widening of shoulders to eight feet in a specific segment to improve bicycle safety. Additional scope encompasses upgrading metal beam guardrails to MGS standards, replacing and installing drainage infrastructure including CSP FES culverts and stormwater guards, constructing biofiltration strips, and refreshing traffic signing and pavement markings. Construction activities are planned primarily during nighttime hours to minimize disruption, and all work must adhere strictly to Caltrans Standard Specifications and environmental regulations under CEQA and NEPA. The project is funded through the State Highway Operation and Protection Program (SHOPP), with no separate option periods or indefinite delivery vehicles noted. The solicitation was posted on June 4, 2026, with proposals due by July 5, 2026, and submissions accepted via email, mail, or the Caltrans environmental document portal. Xenia Rangaswami, Environmental Scientist with Caltrans, serves as the primary point of contact, coordinating environmental reviews and compliance, though no designated contracting officer’s representative or technical representative is identified. While extensive environmental mitigation measures are outlined—including erosion controls, hazardous material labeling, and protection of sensitive habitats—no formal contract clauses, special requirements such as key personnel or security clearances, or line-item cost breakdowns are provided in the documentation. Acceptance of all work is expected to occur at the project site in Solano County under Caltrans supervision, with quality and compliance enforced through adherence to state and federal environmental and construction standards.