west of the station, on the north side of the railway, adjacent to Murrayfield Stadium. By the 1890s, Haymarket had lost some of its original appeal, and came to be often subject to criticism over a lack of maintenance and a perpetual climate of austerity. During 1894, covered platforms were added to the station by the railway engineer James Carswell. Reportedly, during the 1960s and 1970s, British Rail studied options for several new station buildings and other renovations, but ultimately did not want to invest in Haymarket in case it was soon closed. During 1983, British Rail performed some alterations to the station; Haymarket's original train shed was demolished and moved to Bo'ness, while its footbridge was replaced by a smaller counterpart and new platform canopies were installed. As a result of these renovations, the station broke new ground as the first purpose-built barrierless station. In 1989, the south tunnel was electrified by British Rail, while Platform 4 was also extended, as part of the East Coast Main Line electrification programme to allow for through electric trains from King's Cross in London to Glasgow Central and from Waverley station towards the West Coast Main Line. During 2011, in conjunction with the Airdrie to Bathgate project, the north tunnel was also electrified. Since December 2006, the station features four through platforms along with a single bay platform sited on the north side of the station. As a general operating rule, trains to and from stations across the Forth Bridge tend to use Platforms 1 and 2, while those trains running to and from Glasgow and the West Coast Main Line make use of Platforms 3 and 4. The bay platform, which is presently designated as Platform 0, was built for services that terminated at Haymarket, which has often occurred when major engineering works take place at the larger Waverley station. All of the station's platforms are now electrified. Between 1997 and 2012, the annual number of passengers that were recorded as having used the facility had risen by a massive 138 per cent; by 2012, in excess of two million passengers using the station during each year. According to some projections, passenger numbers at Haymarket are expected to climb to as high as 10 million by 2030. The station has been listed as being amongst the most congested on the Scottish railway network, which has been attributed to repeated rapid increases