A Plan for Muni Metro Rail Expansion in San Francisco
For a city less than 7 miles square, we have a lot of streetcar, light-rail, and commuter rail service. But it’s not enough and a lot of the city is left underserved by and system nearly at capacity.
Muni Forward is already solving of todays problems, but it won’t carry us forever. The City is growing and our transit infrastructure will need to grow as well to handle more than a million residents, workers, and tourists.
Last year, Board of Supervisors passed legislation requiring the City to develop a subway master plan. We ran through list of projects we knew were in the works at the time, but it turns out we only scratched the surface.
The SFTMA has now released a Draft Rail Capacity Strategy (PDF) which details the situation we're going to find ourselves in before too long, and how we can address it with a series of propsed new and upgraded lines. The strategic plan calls for 30+ miles of new track along key corridors, putting rail service within a half mile's reach of 95% of the City. With grade separations and speed improvements, Embarcadero will be be no more than 30 minutes from most Muni Metro stations.
Some are very long term projects, but there are a series of short term improvements and low hanging fruit the SFMTA has identified that can be done within just a few years. The major projects fall into three tiers, and it’s noted in the document that sooner is better (and cheeper) than later.
Tier 1
The first tier of major projects would be slated for implementation around 2025. The document avareges all construction times at 5 years, but that will be sorted out as planning gets into the details. The first four big projects total of 12.3 miles of new track and are all pretty obvious choices:
Geary Light-Rail (surface/subway line)
Geneva Light-Rail (surface line already being considered for rail and directly connecting Muni's rail yards)
Central Subway to North Beach & Fisherman’s Wharf (with a Marina Branch shown as well)
M-line / 19th Ave Grade Separation (The four-car M-line subway project)
Tier 2
Second set are targeted a 2040 implementation and focussed more on capacity. There are only 4.3 miles of new track, but these projects will enable three and four-car trains.
Four-car train Capacity at West Portal & Forest Hill (the Market Street stations can hold four-car trains, expanding these two allows four-car service all the way from Park Merced to Embarcadero)
N-Judah three-car Operations and Underground from 9th Ave (still connecting into the Market Street Subway, just staying under ground)
East West LRT from Market & Church to Mission Bay/4th & King (the 16th Street will be is getting dedicated transit lanes soon as part of the recently approved 22-Fillmore transit priority project)
Tier 3
The third tier is aiming for 2050 and will fill out the rail network with 13.8 miles of new track:
Evans Avenue T-Line spur (bringing T service directly into the redeveloped Shipyard district)
Fort Mason Historic Streetcar Extension
2nd & Sansome Streetcar (we’re assuming modern low-floor streetcars, shown here going all the way to Broadway & Fillmore)
19th Ave Light-Rail (a significant upgrade to the 28/28R)
Non-revenue track between the N-Judah and the L-Taraval (a utility track for moving trains around for more efficient service or route around disrutptions)
Marina to Upper Market Light Rail (the Fillmore leg of the 22-Fillmore)
The strategic plan discussed in SFMTA's blog is still in draft form, but even once finalized the projects will continue to evolve and change as the proposals move strategy and corridors to detailed planning. It also remains to work out how there projects will play with BART's existing system and any future Geary BART line.













