Transport in Glasgow to the M80 at Provan is scheduled for completion in 2014. Glasgow is one of only three British metropolitan areas that has an underground metro system; the others being London and Newcastle. The Glasgow Subway (previously "Glasgow Underground"), was built in 1896 and substantially modernised in 1977. It has a single circular route. This, taken together with the orange-coloured paintwork of the carriages, has led to it being known, by guidebooks more than the locals who still refer to it as the "Subway", as "The Clockwork Orange" after the 1971 film. Despite being the third oldest subway system in the
Zürich Underground Railway the Zürkel - which was to run from Wollishofen via Albisrieden, Altstetten, Höngg, Affoltern, Oerlikon, Glattzentrum, Stettbach, Witikon and Tiefenbrunnen. In 2011 the Professor for Transport Systems at the ETH Zürich, Ulrich Weidmann, once again took up the idea of constructing an underground tram below the city centre, similar to the 1962 underground railway project. In his opinion, the S-Bahn was overstretched and the tram too slow. The land freed up by dismantling the railtracks was not to be given over to roads - in contrast to the views of earlier traffic planners - but used in some way to