London Underground infrastructure Tube Programme, investigating replacing the trains for the Bakerloo and Piccadilly lines, is looking for trains with better energy conservation and regenerative braking. The Underground serves 270 stations. Fourteen Underground stations are outside Greater London, of which five (Amersham, Chalfont & Latimer, Chesham, and Chorleywood on the Metropolitan line and Epping on the Central line) are beyond the M25 London orbital motorway. The longest distance between two stations is between Chalfont & Latimer and Chesham on the Metropolitan line. The shortest distance between adjacent stations is the between Leicester Square and Covent Garden on the Piccadilly line. The station furthest
Guadalajara light rail system the large numbers of users of the rail system, there are plans to extend Line 2 to the west and to build a third line. Line 1 runs underground in the city center, but runs "at grade" north and south of the city center, and its surface sections include several level crossings, protected by crossing gates. The station platforms accommodate trains composed of no more than two cars. Line 2 is entirely underground except for a non-passenger section at its east end, connecting the last station to the maintenance facility. Its stations are long enough to accommodate trains of up