on a single rail line along Lake Ontario's shoreline. GO Train service ran throughout the day from Oakville to Pickering with limited rush hour train service to Hamilton. The experiment proved to be extremely popular; GO Transit carried its first million riders during its first four months, and averaged 15,000 per day soon after. This line, now divided as the Lakeshore East and Lakeshore West lines, is the keystone corridor of GO Transit. Expansion of rail service continued in the 1970s and 1980s, aimed at developing ridership in with the introduction of the Georgetown (now Kitchener) line in 1974 and the Richmond Hill line in 1978. The Milton GO Train line opened in 1981, followed by the Bradford (now Barrie) and Stouffville lines a year later, establishing GO Transit's present-day service of seven rail corridors. Other than establishing new rail corridors, GO Transit introduced the Bombardier BiLevel Coaches in 1979, in order to increase the number of passengers carried per train. These unique rail cars were developed in partnership with Bombardier Transportation. Also in 1979, the former Bay Street GO concourse at Union Station was built to accommodate these additional passengers. GO Bus service began on September 8, 1970, extending the original Lakeshore line to Hamilton and Oshawa, as well as providing service north to Newmarket and Barrie. It eventually became a full-fledged network in its own right after 1989, feeding rail service and serving communities beyond the reach of existing trains. Near the end of 1982, Ontario Minister of Transportation and Communications James W. Snow announced the launch of GO-ALRT (Advanced Light Rail Transit), an interregional light rail transit program providing (1980 dollars) of infrastructure. Although this plan was not implemented, certain key objectives from it were established in other ways: additional stations were built, all-day service to Whitby and Burlington was established and networks of buses and trains interconnected the network. GO extended limited rush hour train service on the Bradford, Georgetown and both Lakeshore lines and began offering off-peak service on the Milton line in 1990. Train service was also extended to Burlington on the Lakeshore West line in 1992. In a series of cost-cutting measures, then–Ontario Premier Bob Rae announced a "temporary" reduction in spending on services, causing all of the expansions of the 1990s to be reduced or eliminated. Reconfiguration and revival All day train service was restored from Burlington to Whitby, and peak service