San Bruno, 22 Fillmore, 29 Sunset, and 44 O'Shaughnessy routes. The first battery-electric bus entered service in February 2022. Under the Zero-Emission Bus Rollout Plan published in February 2021, 54 articulated buses will be the first production BEBs for Muni and that first purchase is planned for 2027. The last diesel-electric hybrid buses will leave service by 2037. By 2040, the Muni bus fleet is anticipated to be composed entirely of BEBs: 30 (30-foot) + 497 (40-foot) + 462 (60-foot) for 989 buses in total. No on-route charging is planned; BEBs will use depot chargers at six of Muni's yards. Eventually, it is planned to upgrade these yards with SAE J3105 (inverted pantograph) chargers over several years: Kirkland (77 chargers, 2024–27), Potrero (206 chargers, 2024–27), Flynn (109 chargers, 2025–28), Presidio (217 chargers, 2028–31), Islais Creek (149 chargers, 2030–33), and Woods (177 chargers, 2034–37). The ZEB Rollout Plan was updated in July 2022. Under the revised ZEB Rollout Plan, the existing fleet of trolleybuses would be replaced one-for-one starting in 2031; the existing fleet of hybrid diesel-electric buses would be gradually replaced starting in 2026 with battery-electric buses until the planned retirement of the last diesel hybrids in 2037. In 2038, it is anticipated the mix of buses will be entirely BEBs (30× 32-foot, 403× 40-foot, and 297× 60-foot articulated) and trolleybuses (185× 40-foot and 93× 60-foot artic). The yard upgrades were re-sequenced and accelerated: Kirkland (91 chargers, 2022–25), Potrero (216, 2024–27), Islais Creek (117, 2024–30), Presidio (227, 2027–31), Flynn (107, 2029–34), and Woods (250, 2030–35). The total cost of the project is $1.8 billion, divided between new buses ($1.4 B) and charging infrastructure ($0.4 B), excluding the cost of labor and other potential infrastructure upgrades. Cable car fleet Around the turn of the twentieth century, there were numerous cable car lines providing service to many sections of the city. Some of those cable cars are built by Muni themselves. Currently only three lines and forty cars remain. Light rail vehicle fleet Contemporary light rail vehicles The Muni Metro has run multiple types of light rail vehicles. Originally, 131 Boeing-Vertol cars, which Muni designated LRV1, were used. However, these proved to be extremely troublesome and were phased out of service beginning in 1997. The Boeing cars were replaced by 151 Italian-built Breda LRV2 and LRV3 models. Initially, the Breda vehicles were hailed as more reliable and easier to service than their