 In 1947 and 1948, Oslo Sporveier took delivery of twenty Scania-Vabis B 22 buses, with capacity for 70 passengers, and in 1948 and 1948 fourteen diesel buses built by Hønefoss Karosserifabrikk (Høka) on Leyland chassis were delivered.A further thirty Leyland-buses built by Strømmen were delivered from 1949 to 1951.From 1 February 1953, Oslo Sporveier took over the bus services operated by Ekebergbanen.