US 101 Interchanges Improvement Project: San Antonio Rd to Charleston Rd/Rengstorff Ave

Overview

The Santa Clara Valley Transportation Authority (VTA), in cooperation with the California Department of Transportation (Caltrans), and the Cities of Mountain View and Palo Alto proposes to modify the San Antonio Road and Charleston Road/Rengstorff Avenue interchanges on United State Route 101 (US 101) in the cities of Mountain View and Palo Alto.

Open House

An open house for this project was held on November 14, 2024, from 6 to 7:30 p.m. at the Mountain View Community Center. The public viewed the proposed improvements, asked questions of project staff, and provided comments...

Overview

The Santa Clara Valley Transportation Authority (VTA), in cooperation with the California Department of Transportation (Caltrans), and the Cities of Mountain View and Palo Alto proposes to modify the San Antonio Road and Charleston Road/Rengstorff Avenue interchanges on United State Route 101 (US 101) in the cities of Mountain View and Palo Alto.

Open House

An open house for this project was held on November 14, 2024, from 6 to 7:30 p.m. at the Mountain View Community Center. The public viewed the proposed improvements, asked questions of project staff, and provided comments. Copies of the information provided in the displays are in the documents section for your review.  

Objectives

The purpose of this project is to:

  • Improve access for all travel modes in the area including bicycles, pedestrians, 
  • Improve mobility for all travel modes to planned development adjacent to the project area;
  • Improve traffic operations at the US 101 interchanges at San Antonio Road, Rengstorff Avenue, and the local street network

Project Features

The proposed improvements include but are not limited to the following:

  • Modify existing local street intersections and upgrade bicycle and pedestrian facilities along San Antonio Road, and Charleston Road/Rengstorff Avenue within the project limits;
  • Add an on-ramp from San Antonio Road to southbound US 101. Close the on-ramp from Charleston Road to southbound US 101;
  • Widen and replace the existing San Antonio Road and Rengstorff Avenue structures over US 101 with a wider structure to better meet transportation needs, including complete streets elements such as bike lanes and sidewalks;
  • Add a southbound auxiliary lane on US 101, as necessary.

Timeline

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Preliminary Engineering
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Environmental Clearance
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Design and Engineering
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Construction
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