San Francisco could one day have a Geary subway. Here's what it would mean for the west side:

[marmar]

May 11—Rail on Geary has been a dream since before BART's inception.

BART originally planned to build a line from downtown San Francisco through most of the Richmond and up north to Marin County through a lower deck added to the Golden Gate Bridge, but the idea never materialized. Decades later, San Francisco planners highlighted the Geary corridor in the 1995 Four Corridors Plan that called for surface rail on Geary and expansions on three other major roadways.

Now, the possibility of rail on Geary has again been revived, if only faintly, with a new study by the County Transportation Authority that will examine a potential subway that runs east-west on a portion of Geary and north-south on 19th Avenue.

The study, expected to be finalized by the middle or end of 2023, will be the launching point of what will likely be a decades-long attempt to bring rail to two of the west side's oft-congested corridors and could coincide with other ambitious Bay Area transit projects under the planning pipeline, such as a second Transbay Tube. ................(more)

https://www.masstransitmag.com/rail/news/21267433/ca-sf-could-one-day-have-a-geary-subway-heres-what-it-would-mean-for-the-west-side