 In 1927 its started with bus transport, including from 1940 to 1968 trolleybuses.Since 1966 rapid transit and from 1985 water buses have also been operated by the company.It was split into two separate companies in 2006; Kollektivtransportproduksjon took over the operation while Oslo Public Transport Administration (who retained the Oslo Sporveier brand) was responsible for buying the services, fare regulation and marketing.