Harrow-on-the-Hill station Harrow-on-the-Hill station Harrow-on-the-Hill is a London Underground station served by the Metropolitan line and National Rail services, in Travelcard Zone 5. The stations two exits are located between College Road and Lowlands Road in the Greenhill area of Harrow, about half a mile north of the locality from which it takes its name. This is where the branch from Uxbridge joins the main line and where fast and slow lines are divided. The station is the junction of four LU tracks from Baker Street (paired by direction), two Network Rail tracks from Marylebone, four LU tracks (paired by speed) to
London Underground S7 and S8 Stock The DMIs show destination and line, and can display other messages such as safety notices. There are also DMIs on the exterior, with text alternating between destination and line, and on S8 stock the type of service, i.e. fast, semi-fast or all stations. Another new feature is that to prevent accidental pressing of emergency alarms there are flaps over the alarm buttons where the wheelchair spaces are. The air-conditioning system, the first on London Underground trains, is supplied by Mitsubishi and has two circuits so that if one fails there is still 50% capacity. Through gangways from car to car