The Lyon Metro () is a rapid transit system serving Lyon Metropolis, France. First opened in 1974, it currently consists of four lines, serving 40 stations and comprising of route. Part of the Transports en Commun Lyonnais (TCL) system of public transport, it is supported by two funiculars and a tramway network. Unlike other French metro systems, but like RER and other SNCF services, Lyon Metro trains run on the left. This is the result of an unrealised project to run the metro into the suburbs on existing railway lines. The loading gauge for all lines is , more generous than the average for metros in Europe. The Lyon Metro has rubber-wheel cars. Daily weekday ridership was 740,000 in 2011. Routes The Lyon Metro consists of four lines, A, B, C and D, each identified on maps by different colours: Lines A and B Line A from Perrache to Laurent Bonnevay (Astroballe) and Line B from Charpennes to Part-Dieu were constructed by cut-and-cover and went into service on 2 May 1978, as the inaugural lines of the Lyon Metro. Trains on both lines run on rubber tyres rather than steel wheels. Line B was extended to Jean Macé on 9 September 1981, to Gerland on 4 September 2000 as well as later to Gare d'Oullins on 11 December 2013. An extension to Vaulx-en-Velin La Soie on Line A opened in October 2007. By 2020, Line B will be automated, with the same system as Line D. New MPL 16 rolling stock has been ordered to Alstom in 2016 for Line B. The MPL 75 trains currently used on Line B will join the other MPL 75s on Line A to increase capacity. Line C The Croix-Rousse-Croix-Paquet rack railway, which was refurbished in 1974, was integrated into the Metro in 1978 as Line C, with an extension to Hôtel-de-Ville (thus running from Hôtel-de-Ville to Croix-Rousse). It was extended to Cuire on 8 December 1984. The line was constructed using various methods; the incline rising through a deep tunnel, the portion on the flat at Croix-Rousse using cut-and-cover while the section beyond Hénon runs on the surface. The Croix Paquet station claims to be the steepest metro station in Europe, with an incline of 17%. Line C uses an overhead wire while Lines A, B and D use a third rail. Line D Line D, the first fully automatic metro line in