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  6. Soscol Junction Intersection Operational Improvement Project Fact Sheet

Soscol Junction Intersection Operational Improvement Project Fact Sheet

Project Description

The Project includes the construction of a tight diamond interchange with two multi-lane roundabouts on either side of SR-29. SR-29 will be rebuilt as an overcrossing north of the intersection with SR-221, providing separation between SR-29 and the Soscol Ferry Road and the adjacent roundabout entry. The project will also construct class 1 facility to accommodate bicycles and pedestrians through the intersection.

Driver Benefits

Project will improve safety, relieve congestion and improve multi-modal transportation at the Gateway to the Napa Valley. As part of the project, the construction of two new roundabouts within the SR-29/SR-221Interchange will keep the traffic flowing at one of the busiest highway interchanges in the Napa Valley. This will reduce the risk of rear-end accidents and traffic delays by converting the existing signal-lights approaching the interchange into a series of roundabouts.

Rendering of the projected Soscol Junction interchange that features roundabouts and a flyover.

Project Location

State Route 29/221/Soscol Ferry Road intersection in Napa County

Map showing the location of the Soscol Junction Interchange Project at the intersection of State Route 29, State Route 221, and Soscol Ferry Road.

Key Dates

Start Construction: May2022
Finish Construction: Fall 2026

Project Contact

Ryan Leong, Caltrans Public Information Officer
Phone: (510) 385-7068
Ryan.Leong@dot.ca.gov

Project logo for the Soscol Junction Interchange Project on State Route 221 and State Route 29 in Napa County.