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Bernardo Avenue Undercrossing

The Bernardo Avenue Undercrossing project will provide a separated pedestrian and bicycle pathway. This pathway will connect north and south Bernardo Avenue. The crossing will go beneath the Caltrain railroad tracks and Central Expressway. The three agencies that will lead the project are the City of Sunnyvale, the City of Mountain View and VTA.

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Nabilah Deen, Transportation Engineer, 408-730-7579


We developed four project alternatives for the preliminary design phase. The City Council will select a preferred alternative for the environmental clearance phase. The environmental clearance phase refers to the documentation review process for CEQA* clearance. For the preliminary conceptual designs, see Documents tab.

*California Environmental Quality Act (CEQA)

Next Steps

Spring 2022 - Community Outreach Meeting

Summer 2022 - Joint Sunnyvale-Mountain View Bicycle and Pedestrian Advisory Commission/Committee (BPAC) Meeting

Summer 2022 - City Council Selection of Preferred Alternative

Summer 2023 - City Council Adoption of Final Report with Concept Design and Environmental Clearance Document


The preliminary design phase will include several layout alternatives. The alternatives will include pedestrian and bicycle-friendly concepts. They will limit right-of-way impacts to Caltrain, Santa Clara County and private properties.

Satellite map showing buildings and trees at project location, with a yellow callout for the project limits bounded in a dashed yellow line from the intersection of Bernardo Avenue at Evelyn Avenue and Central Expressway.


Bernardo Avenue Preliminary Conceptual Designs

Special Joint Sunnyvale-Mountain View Bicycle and Pedestrian Advisory Commission/Committee (BPAC) Meeting on YouTube, Dec. 2, 2020

Special Joint Sunnyvale-Mountain View BPAC Meeting Materials, Dec. 2, 2020

Special Joint Bicycle and Pedestrian Advisory Commission 20-0992, Dec. 2, 2020 - Presentation of Draft Concepts for the Bernardo Avenue Undercrossing Project

Report to Council 17-1203 - February 6, 2018 - Authorize Amending an Existing Contract for the Preliminary Design and Environmental Clearance of the Bernardo Undercrossing Project (F17-075) and Approve a Cost Sharing Agreement with the City of Mountain View and a Service Agreement with the Peninsula Corridor Joint Powers Board Regarding the Project and Approval of Budget Modification No. 38


In 2018, the City entered a cost-sharing agreement with the City of Mountain View. This agreement was for the preliminary design and environmental clearance phase.

In July 2020, Sunnyvale and Mountain View received a funding award for the project. This award was the 2016 Measure B Bicycle & Pedestrian Capital Projects Competitive Grant. This grant award will fund the design and construction phase of the project.

This project will involve right-of-way coordination with Santa Clara County and Caltrain. We will be working with the City of Mountain View for the design and environmental phase of the project. VTA will lead for the construction phase of the project.

Last Updated: Dec 6, 2021