6th Street Undercrossing

Project Abstract

This project creates a vital crosstown link for pedestrians, bicyclists, and vehicles. On one side, it opens up into the West End Neighborhood, Railroad Square, the CHOPS Teen Center, the future SMART station, and miles of creek trails. On the other side it provides an easy connection to the Saint Rose Neighborhood and Church, the Sonoma County Museum, the Transit Mall and Downtown.


A large portion of the undercrossing was constructed by Caltrans in 2005-2007 as part of the Hwy 101 widening project to install carpool lanes. When Caltrans was unable to complete the undercrossing due to budget limitations, the City of Santa Rosa volunteered to complete the work. The Sonoma County Transportation Authority was an essential partner in both securing grant funding and in working with Caltrans to successfully deliver the project.

Two grants were received for this project. A Transportation Enhancement grant provided approximately $480,000 for bicycle and pedestrian improvements, and a State Transportation Improvement Program grant provided $200,000. The remaining $440,000 plus all engineering and construction management costs were paid by the City of Santa Rosa using Gas Tax funds.

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