O-Divisadero: Loop Line Phasing

Phase 1 of the Loop line would bring Muni Metro service to the area North of Market between Transbay/Embarcadero Station on the edge of the San Francisco Bay and States/Castro Station at the base of Twin Peaks. I propose eight stations north of Market, plus two transfer stations to existing rail infrastructure at either end of the line. Alignment along Broadway allows use of the existing tunnel under Russian Hill to save costs; only the Van Ness - Alamo Square part of the alignment would require tunnel boring.

Phase 1 _ Broadway-Divisadero Subway
(view O-Divisadero in a larger map _ read methodology for proximal population statistics)

South of Market, the city is already served by several spans of Muni surface Light Rail (the J-Church and T-Third) as well as the Central Subway; additional service to Noe Valley, the Mission, SoMa and Rincon Hill would complete the Loop with 8 stations south of the slot (which would then share track with the G-Geary along Beale, through the Harrison street undercrossing and Transbay Station).

Phase 2 _ Mission-SoMa Subway
(view OLx-Loop Line in a larger map _ read methodology for proximal population statistics)

O-Divisadero: Central Loop Line

To complement the otherwise spoke-hub derived network of the Muni Metro system in San Francisco, a Loop line might be employed with transfers spaced evenly along the line to various trunks. This loop serves many of the primary tourist locations in the city (Columbus Ave / North Beach, Japantown Peace Plaza, Alamo Square / the Painted Ladies and the Haight) as well as a variety of quite populous residential areas (the central Van Ness corridor, Western Addition, Noe Valley, Mission, SoMa); the mix of users could assure high ridership year-around.

The northern component of the system serves the Financial Disctrict, Jackson Square, Nob- and Russian Hills, Japantown and Western Addition, Alamo Square, NoPa, the Haight and Corona Heights. The southern half runs through the Castro, Noe Valley, Mission Dolores and Liberty Hill, the Mission, Western and Central SoMa, South Beach, Rincon Hill and the Transbay District.

With the Central Subway providing Northwest-Southeast cross service, the Market Street Subway providing Northeast-Southwest connectivity and the G-Geary heading directly west from the Transbay Terminal, a robust skip stop transfer network could be achieved with a circular subway.

O-Divisadero Loop in the context of San Francisco's otherwise hub-and-spoke Metro System. (view mutative Muni Metro evolution)