Photo of a pair of subway tracks in a tunnel

Photo by SFMTA Photography Department


The Geary/19th Ave Subway and Regional Connections Study was identified in ConnectSF’s Transit Investment Strategy as a key investment to build more rail to San Francisco’s busiest places. The subway would serve what is the city’s most crowded bus corridor, connecting some of our busiest neighborhoods to downtown and regional destinations.

Planning and construction of a subway is a multi-phase effort, occurring over many years. This study will focus on the first phase of planning and development.

The study will:

  • Outline potential benefits, costs, and risks of the project;
  • Identify the key questions that must be addressed and resolved as planning, design, and construction progresses; and
  • Develop a framework and process to successfully design and build the subway. 

Purpose and Objectives

The objectives of the study phase are to:

  • Describe the broad benefits, costs, and rationale for the project.
  • Explore technical aspects, work program, and governance that will be developed more fully in a subsequent alternatives analysis.
  • Identify the strategy to deliver the project, including outreach, funding, system integration, and policies.
  • Undertake initial technical coordination and policy discussions with local and regional public agencies.

This study will produce two deliverables: 

  1. Documentation of the benefits of the project along with the key issues to be addressed in the planning, design, and implementation of a subway in the Geary/19th Avenue corridor
  2. Documentation of how the project should advance, including scoping for a subsequent Alternatives Analysis phase, identification of roles and responsibilities, and a plan for outreach and engagement. 


  • SF Planning
  • BART
  • Capitol Corridor


  • Fall 2023

    Initial Planning and Technical Exploration

  • Winter - Summer 2024

    Partner Engagement and Public Outreach

  • Fall 2024

    Final report

Reports & documents

Board presentation

April 12, 2022 Board


April 12, 2022 Board presentation (PDF)


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Related programs


ConnectSF is a multi-agency collaborative process to build an effective, equitable, and sustainable transportation system for San Francisco’s future.

The Subway Vision explores the expansion of San Francisco's subway network.