The Geary Bus Rapid Transit project added bus rapid transit features to San Francisco Municipal Railway bus lines along Geary Boulevard. The corridor serves routes 38, 38R, 38AX, 38BX which combined to serve 52,900 daily riders in 2019, the most of any corridor in the city. The project added transit-only lanes, painted red, along many sections of Geary between the Transbay Transit Center and 33rd Avenue. After the project’s completion, over 75% of Geary corridor now has transit lanes.

The San Francisco Municipal Railway ( MEW-nee; SF Muni or Muni), is the primary public transit system within San Francisco, California. It operates a system of bus routes, the Muni Metro light rail system, three historic cable car lines, and two historic streetcar lines. Previously an independent agency, the San Francisco Municipal Railway merged with two other agencies in 1999 to become the San Francisco Municipal Transportation Agency (SFMTA). In 2018, Muni served 46.7 square miles (121 km2) with an operating budget of about $1.2 billion. Muni is the seventh-highest-ridership transit system in the United States, with 142,168,200 rides in 2023, and the second-highest in California after the Los Angeles County Metropolitan Transportation Authority.