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Transforming Passenger Rail in Northern California

Link21 is working with the California State Transportation Agency (CalSTA) and our partners to transform Northern California's passenger rail network into a faster, more integrated system that provides safe, efficient, equitable, and affordable travel for everyone. At the core of Link21 is a new transbay passenger rail crossing between Oakland and San Francisco.

Learn more about Link21

Man talking to Link21 staff at a grassroots event

Help Us Improve Your Northern California Travel Choices

We are excited to offer several opportunities for you to learn about Link21 and share your input on train service improvements that Link21 concepts would provide. Join us at any of our upcoming events.

Attend an Event

Train is going next to the river

Unlocking Travel Possibilities with a Second Transbay Crossing

To amplify rider connection and benefits already planned by our partner agencies across the Megaregion, Link21 is planning a second underground train crossing between San Francisco and Oakland/East Bay to accommodate Regional Rail, BART, or perhaps both in the future. Concepts will be developed, evaluated, and refined to identify project(s) to move forward into environmental review.

Weigh in on draft concepts

train station

We’re Reimagining Rail

We kicked off Phase 1: Concept Identification in early 2022. Over the next two years the Program will work closely with partners, stakeholders, and the public to explore project concepts.

Learn more

A group of masked passengers stands inside a busy BART train.

Northern California Residents on the Move

To understand current travel needs, key destinations to which our residents are traveling, and how population growth will impact future travel, Link21 conducted a Market Analysis, the most detailed and comprehensive travel analysis ever performed for the 21-county Northern California Megaregion.

Explore the data

Daniel Mitchell Lucia Griselda speaking with Link21 CEC staff

A Solid Foundation Centered on Equity Guides Planning

Our strong partnerships with community members, organization leaders, agency partners, technical specialists, and other key leaders across the Megaregion will continue to grow as we work together for a better, more equitable future. Learn more about what we’ve accomplished thus far.

ENGAGEMENT, OUTREACH, & EQUITY Phase 0 Program Definition Concept Identification Project Selection Project Delivery Phase 1 Phase 2 Phase 3 2019 -2022 2022 - 2024 2024 - 2028 2028 - 2039


Where We Are Today and Where We're Going

We are conducting research and collecting community input to plan the best passenger rail transportation system for Northern California.

Check out our timeline to see where we are in the process and how Link21 will unfold over the coming years.