Caltrans and the Napa Valley Transportation Authority (NVTA) hosted a ribbon cutting for the State Route 29/221 Soscol Junction Interchange Project in southern Napa County last week.
The three-year, $56.7 million project to replace the signalized intersection of State Route 29, State Route 221 and Soscol Ferry Road with an interchange composed of an overpass and two roundabouts, a configuration that will add fluidity to traffic flow and reduces congestion. This accounts for two decades of planning.
The project also includes class I facility to accommodate bicycles and pedestrians through the intersection. MTC was instrumental in helping deliver funding to the project.
"As a Napa native, I’ve seen a lot of changes over the years and I’m excited about these long overdue improvements to Soscol Junction,” said California State Senator Bill Dodd. “With the added bike lane and pedestrian access, this new interchange will serve as a gateway for ease of travel through Napa County.”
The project received $19.3 million from the Solutions for Congested Corridors Program and $422 thousand from Local Partnership Program, both created and funded by the Road Repair Accountability Act of 2017, also known as Senate Bill 1(SB1). In addition to SB1 funding, the project is funded with $33.2 million in State and regional funds $3.7 million in local funds.
Unlike a typical interchange with an elevated overpass where motorists make inter-route connections, most motorists at Soscol Junction will make connections at surface level on roundabouts which will be hardscaped using the colors of the encompassing area.
Caltrans landscaped the area with local plants, including oaks whose canopies will visually screen the interchange from distant onlookers.
In an area with increased traffic, yet barren of pedestrian and cycling facilities, Caltrans will build 1,200 feet of Class I bicycle and pedestrian paths. Eventually the bicycle/pedestrian lanes will connect to the Vine Trail, a 47-mile multi-use path that will stretch from Calistoga to the ferry terminal in Vallejo.
“Motorists, cyclists and pedestrians will all benefit from the new design, " said Dina El Tawansy, Caltrans Bay Area District Director. "This interchange is a great example of what can be created when the transportation community and local groups work together. Caltrans values its partnership with the Napa Valley Transportation Authority and the community in producing this new infrastructure that will serve the community well for years to come.”
Ghilotti Construction is the contractor for the project.
For more information visit the Soscol Junction Project webpage: https://dot.ca.gov/caltrans-near-me/district-4/d4-projects/soscol-junct…
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