Metropolitan line the top green light over a yellow light, and clear two green lights. The Metropolitan line's suburban rail character opposed to other London Underground lines is also shown by the long distances between stops. Eight of the top 10 furthest apart stations on the Underground are on the Metropolitan line. The section between Chalfont & Latimer and Chesham is the longest at , whilst the Finchley Road to Wembley Park section is the second longest, and Rickmansworth to Chorleywood the fourth longest overall. The Metropolitan line is the only London Underground line to operate an express service. Designed for commuters
London Underground battery-electric locomotives Victoria line ATP equipment which was designed by Metronet BCV on behalf of Transplant, the operator of the fleet. This system was installed during 2007 at Ruislip Depot. It is compatible with the new Distance-to-Go Radio (DTG-R) ATP system which has been implemented on the Victoria line by Westinghouse Rail Systems. The locomotives are, since the start of London Underground's PPP scheme, in the ownership of TransPlant. The locomotives are usually stabled at Lillie Bridge Depot or Ruislip depot. The traditional use of these locomotives has been to haul trains using power from the rails until they reach the area