Bay Crossings Study Update | Plans + Projects | Our Work

Bay Crossings Study Update

By bridge, BART or ferry, travel across San Francisco Bay unites our region.

MTC periodically takes a big-picture view of the ways residents cross the bay. We look at existing options, and compare them against future travel forecasts.

Our recent Bay Crossings Study Update projected BART’s transbay ridership would exceed capacity by 2025.

 And by the year 2035:

  • The number of daily transbay trips would jump 33 percent
  • Peak-period demand on existing bridges would exceed capacity by over 20 percent

Here are just a few of the study's recommendations:

  • Additional boarding platforms at BART’s Embarcadero and Montgomery stations
  • Speeding BART service in San Francisco and the East Bay by allowing trains to skip stops at some stations
  • East Bay bus terminal with frequent shuttle service to/from San Francisco’s new Transbay Transit Center
  • More San Francisco destinations for AC Transit buses
  • MacArthur Blvd. bus ramp connection to I-580 near the Oakland/Emeryville border
  • I-80/Powell Street ramp improvements
  • All-electronic “open-road” tolling on Dumbarton and San Mateo-Hayward bridges

Get the full update: Get the details on our recommendations, alternatives and next steps.

Data contributors for the latest Bay Crossings Study Update included AC Transit, Altamont Commuter Express, BART, Caltrans and the San Francisco Bay Area Water Emergency Transportation Authority as well as MTC and BATA.

Alternatives considered, but not recommended, by our recent Bay Crossing Study Update include:

  • New highway/transit bridge or tunnel connecting Interstate 238 in the East Bay and Interstate 380 on the Peninsula
  • Widening of San Mateo-Hayward Bridge
  • Dumbarton Bridge approach improvements
  • New BART crossings

Take a look at the many alternatives we studied. Download the study.