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Link21 Program

Link21 will transform Northern California's passenger rail network into a faster, more integrated system, providing safe, efficient, and affordable travel for everyone. At the core of Link21 is a new transbay crossing between Oakland and San Francisco.

Learn more about Link21

Passengers wearing masks inside of a BART train

Help Us Prioritize Link21 Goals and Objectives

Let us know what matters most to you. 

Take our short survey

Map of the Northern California Megaregion

Defining Where People Want to Travel by Rail

Link21 will help people get to the places they want to go. By creating new connections and streamlining existing service, Link21 will bridge the gap between affordable housing and high-quality jobs while providing exciting new opportunities to explore Northern California. 

Take a quick look at the Link21 Market Analysis now underway.

Conductor pulling train into station

Equity Informs Every Aspect of Link21

Read our equity platform to learn how Link21 is building a rail system for all people in Northern California. 

To include as many voices and perspectives as possible, we want to hear from you.

 Get involved and stay informed

Where We Are Today & Where We're Going

The need for a new transbay rail crossing has been envisioned for decades.
Link21 began in earnest a year ago. Check out our timeline to see where we are in the process and how this long-range project will unfold over the coming years.

Phase 0

Program Definition

Starts 2019

We are here

Phase 1

Program Identification

Starts 2021

Phase 2

Project(s) Selection

Starts 2024

Phase 3

Project(s) Delivery

Starts 2028

Phase 4

Ready for Service


People on a train checking tickets

Looking Towards Recovery

During this unprecedented pandemic, BART and Capitol Corridor — along with our transit partners — are providing essential services to the traveling public. We're taking active measures to ensure the health and safety of riders and employees. 

We've learned that the public supports long-range transportation projects, despite the short-term challenges posed by the pandemic. We're planning for the future to fulfill our commitment to fast, frequent, safe, reliable, and comfortable rail service for Northern Californians.