RFP 2024-01 Preparation of Plans, Specifications and Estimate (PS&E) for I-80/I-680/SR12 Interchange Project (Package 5)

February 23, 2024

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The Solano Transportation Authority (STA) invites qualified consultants to submit a proposal to provide professional consultation services to prepare and complete the Plans, Specifications, and Estimate (PS&E) of Package 5 of the I-80/I-680/SR 12 Interchange Project.

Package 5 [SR 12 (West)/Red Top Road/Business Center Drive Project] of the I-80/I-680/SR 12 Interchange Project involves extending Business Center Drive from its current terminus to a realigned Red Top Road. This extension includes construction of a new partial interchange on SR 12 (West) at Red Top/Business Center, as well as a reconstruction of the I-80/Red Top Road

The full Request-for-Proposal (RFP) can be requested by calling (707) 424-6075 or downloaded online as a PDF file at

The RFP describes the project and requirements associated with this RFP. Each Proposer should review these requirements including the evaluation criteria in order to submit a competitive Proposal.

Qualified consultants are invited to submit three (3) hard copies and one (1) digital copy (via flash drive) of your Proposal to the STA office no later than 4:00 PM on Friday, March 29, 2024. The Proposal should be addressed to:

Nicholas Burton, PE
STA Director of Projects
Solano Transportation Authority
423 Main Street
Suisun City, CA 94585-2473

Note that this deadline is firm and late submittals will not be accepted. Proposals will be reviewed and, if needed, the firms/teams whose qualifications most closely meet the STA’s needs will be invited to interview the week of April 8, 2024.

The STA encourages, but does not require for this solicitation, the use of local firms. To assist in the use of local firms, the STA has prepared a database of contact information for local firms for convenience purposes only and without guarantees as to the ability of such firms to provide the services. This database and the Local Preference Policy can be viewed at:

If you have any questions regarding this RFP, please contact Nicholas Burton at 707-399-3207 or e-mail at

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