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
M60 motorway 19-24) opening in October. The original plan called for a completely new motorway, but policy change led to the plan which created the current motorway. As soon as it opened, the motorway got close to its projected maximum volume on significant sections. As an orbital motorway, it is equivalent to London's M25 motorway; unlike the M25, the M60 forms a complete loop. In 2004, a section of the northern M60 was the UK's busiest stretch of road, with an average of 181,000 vehicles per day using the stretch between junctions 16 and 17. Usually, the western side of the M25