SBS inherited many problems from its Chinese predecessors, including use of 14 non-standard bus models that frequently broke down, poor standards among the staff and inadequate infrastructure. Hence, the government seconded a Government Team of Officials to SBS in 1974 to overhaul the management and culture. Under the supervision of the GTO, SBS completely overhauled their bus fleet with new buses of usually the Albion Viking VK or Mercedes-Benz OF1413 makes and introduced a rigorous maintenance regime, improving the reliability of their buses greatly whereas a new disciplinary code was introduced, reducing complaints by half from 1979 to 1983. The government also helped to further alleviate the burden from SBS by introducing priority bus lanes to speed up bus services and introduced Scheme B bus services operated by private companies in 1974. In 1977, SBS introduced into service its first double-decker buses, the Leyland Atlantean AN68 on route 86 between Tampines Way and Shenton Way. In light of dissatisfaction over bus services in the Jurong area and requests for improved coverage, SBS started a reorganisation of bus services across the country, starting with Jurong. This consisted of a network of internal services serving a town, with external services terminating at a point in the town, along with bus interchanges to serve as such termini. Additional depots were also constructed, which SBS claimed gave them more control over bus operations. In 1975, one-man operation (OMO) that charged a flat fare (for the case of SBS; TIBS opted for a distance fare) was introduced to cut manpower costs; this was followed by a one-man operated ticketing operation (OTS) in 1982. By 1984, bus conductors were completely phased out. By 1978, SBS was in a healthy position to be publicly listed on the Singapore Stock Exchange as SBS (1978) Limited. 1980s-1990s: Market competition By the 1980s, SBS had managed to modernise its fleet with new buses such as the Volvo B57, Mercedes-Benz OF1417 and the Leyland Atlantean AN68. By 1982 however, there was concerns that SBS might turn complacent. To ensure that SBS remain competitive, the government gave Ng Ser Miang of Singapore Shuttle Bus (SSB, one of the two operators of City Shuttle Service) the green light to set up a second operator. Named as Trans-Island Bus Service (TIBS), TIBS started operations the following year with a modest fleet of 90 Hino buses on routes 160 and 167. By 1988, the company