Central line (London Underground) that the transport benefits of a Park Royal station on the Central line are not sufficiently high to justify the costs of construction. Central line (London Underground) The Central line is a London Underground line that runs through central London, from , Essex, in the north-east to and in the west. Coloured red on the Tube map, the line serves 49 stations over , which makes it the longest Tube line. It is also one of only two lines on the Underground network to cross the Greater London boundary, the other being the Metropolitan line. One of London's deep-level railways,
London Underground battery-electric locomotives ground. A number of the machines were fitted with Automatic Train Operation (ATO) equipment to enable them to work on the newly opened Victoria line. Subsequently, some have been fitted with Automatic Train Protection (ATP) equipment, compatible with the system used on the Central line, and some with ATP equipment which enables them to work with the replacement Distance-to-Go Radio (DTG-R) system on the upgraded Victoria line. The first two battery locomotives supplied for the London Underground were manufactured by Hurst Nelson and Co, who were based in Motherwell. They were delivered in August 1905, and were used during the