Brakes were fitted to any unbraked axles. Less- antiquated tramcars in the Innsbruck fleet that were not scheduled to be pensioned-off received similar upgrades to their coupling mechanisms and brakes. In 1956, the new "Concert Bridge" was ready, and it was possible to remove the old iron tram bridge that had crossed over the Arlberg railway line, all of which allowed for further minor rationalisation of the tramline layout in this part of the city centre. The 1960s were years of strong economic growth supported by (relatively) stable oil prices. The continued to upgrade the tram fleet. In 1960, six high-capacity tramcars from the Vienna Lohner were purchased and placed in service. company entered service, allocated the tramcar numbers 61–66. At the Bergisel terminus halt a "triangular platform" was installed in June 1960 in order to enable trams to turn around: four months later, in October, the "triangular platform" was replaced by a more conventional terminal loop. Further detailed reconfiguration and rationalisation of the network in the city centre took place, and Line 4 now terminated at the Main Railway station rather than Wiltner Place. In 1964, the track along Leopold Street to Wiltener Place was lifted, after which Line 3 also traveled by way of the Main station. The last network expansion for thirty years took place in 1965 with the extension of Line 3 to what is still its terminus halt at . The acquisition in 1966 and 1967 of seven Lohner articulated trams, similar to those being introduced in Vienna around the same time, and numbered 71–77, made it possible to retire the last of the old pre-war Innsbruck powered tramcars. Plans for the 1976 Winter Olympics placed the future of Line 4 (the Hall-in-Tirol line) in question. The Reichenauer Bridge had to be renewed and the Haller Street widened to four lanes, which would require a major rebuild for the tramlines using it. The decision was instead taken to remove the rail tracks from the road and operate the service with buses. The last tram ran on Line 4 on 6 June 1974 and the bus service along the route was inaugurated on 7 June 1974. Much of the rolling stock used for the former Hall-in-Tirol line had become very old and was now retired. Other tramcars were reallocated to Line 6, while one had already been rendered inoperable when one of its bogies had been cannibalised to replace a damaged sub-assembly on another vehicle.