was run down, with the last major investment on the suburban tracks having taken place nearly fifty years earlier. Sixty-year-old Tait trains (known colloquially as "red rattlers") were still in operation, and inner city congestion at Flinders Street led to peak hour delays. In February 1971, the Melbourne Underground Rail Loop Act was passed, establishing the Melbourne Underground Rail Loop Authority (MURLA) to build a connecting series of tunnels from the major stations along the north, south, east and west extremities of the Melbourne CBD. The project ran for over 14 years, opening progressively between 1981 and 1985. The loop was designed and constructed to improve the capacity of Flinders Street and Spencer Street stations to handle suburban trains and to offer easier connections for users. Other major changes took place in 1976 when the government authority overseeing Victorian Railways became VicRail and was gradually restructured along corporate lines. Following the restructure, in 1980 the Victorian Transport Study, better known as the Lonie Report, was delivered and called for financial rationalisation. The closure of the Port Melbourne, St. Kilda, Altona, Williamstown, Alamein and Sandringham lines was also recommended, along with their replacement with bus routes instead. These recommendations and cuts were not enacted, however many uneconomical branch lines were closed throughout the rest of the state. The line between Lilydale and Healesville was closed in 1980, now used by the Yarra Valley Railway beyond Yarra Glen. The branch from Baxter to Mornington was closed in 1981, but the line south of Moorooduc is now operated by the Mornington Railway as a tourist route. The Metrol train control centre was opened in 1980 to coordinate trains throughout the network using computer software that remains in use today. Public transport in Melbourne was also reorganised, with the Metropolitan Transit Authority (MTA) formed in 1983 to coordinate all train, tram and bus services in the city to improve interoperability. With the electrification of the Werribee line in 1983, followed two years later by an extension of the Altona line to Laverton, and the City Loop in full operation by 1985, the last major modernisation of Melbourne's train lines in the 20th century was complete. Isolated from the City Loop, the Port Melbourne and St Kilda lines were converted to standard gauge light rail in 1987 to accommodate tram routes 111 (now route 109) and 96. The route 96 remains one of the world's