The width of the carriages, 2.4 metres, is narrower than that of newer French systems (such as the 2.9 m carriages in Lyon, one of the widest in Europe) and trains on Lines 1, 4 and 14 have capacities of 600-700 passengers; this is as compared with 2,600 on the Altéo MI 2N trains of RER A. The City of Paris deliberately chose the narrow size of the Metro tunnels to prevent the running of main-line trains; the city of Paris and the French state had historically poor relations. In contrast to many other historical metro systems (such as New York, Madrid, London, and Boston), all lines have tunnels and operate trains with the same dimensions. Five Paris Métro Lines (1, 4, 6, 11 and 14) run on a rubber tire system developed by the RATP in the 1950s, exported to the Montreal, Santiago, Mexico City and Lausanne metros.