The Picc-Vic Railway was a 1971 proposal for an underground railway in Manchester. It would have linked the city’s mainline train stations of Piccadilly and Victoria with a 2.75 mile underground railway. It would have included three intermediate stations. (As an aside, London’s Victoria Line at one time had the working title of ViKing line - derived from Victoria - Kings Cross).
The proposal was short-lived as the costs were prohibitive and the scheme was abandoned in 1977. In 2012 however, a protected space 9 metres below the Arndale Shopping Centre was discovered, which would have provided a protected passage for the line and avoided future excavation costs. The void is approximately underneath the Topshop in the centre.
The current Metrolink Tram network in Manchester provides the connectivity originally envisaged as an underground network but as a surface scheme.