San Francisco Municipal Railway (Muni) began operations in 1912 as one of the first publicly owned transit agencies in the U.S. The Muni Metro light rail system was developed in the late 1970s, utilizing the Market Street Subway. Muni also operates historic streetcars, including the F Market & Wharves line, and the iconic cable cars. The system is a vital part of San Francisco's public transportation network, connecting neighborhoods across the city.