Vallejo / Transportation

CompletedAs reported Jul 7, 2026

SR 37/Fairgrounds interchange opened to traffic in July

Completed, per Solano Transportation Authority.

Source: Solano Transportation Authority, Opening of the Bay Area's First Diverging Diamond Interchange · checked Oct 10, 2026 · Coverage updated Oct 10, 2026

Solano Transportation Authority's July 7, 2026 announcement reports the opening of the redesigned SR 37/Fairgrounds Drive interchange in Vallejo and a ribbon-cutting that day. The diverging-diamond layout includes access for people walking and cycling. STA describes the interchange as supporting future Solano 360 development; that separate redevelopment is not established as completed by this opening.

How we know (2 sources)

Dated source evidence; the project may have changed since then. An approval does not establish construction or an opening.

Summary

STA reports the SR 37/Fairgrounds Drive interchange opened to traffic, with a July 7 ribbon-cutting.

Opening of the Bay Area's First Diverging Diamond Interchange

Solano Transportation Authority

Evidence dated: Jul 7, 2026 · Source checked: Oct 10, 2026

Original source reviewed October 10, 2026; supports the dated claim. Current operating outcomes are not inferred.

Development status

STA reports the SR 37/Fairgrounds Drive interchange opened to traffic, with a July 7 ribbon-cutting.

Opening of the Bay Area's First Diverging Diamond Interchange

Solano Transportation Authority

Evidence dated: Jul 7, 2026 · Source checked: Oct 10, 2026

Original source reviewed October 10, 2026; supports the dated claim. Current operating outcomes are not inferred.