service was curtailed due to the difficulty in securing train paths in the congested West Midlands, and operated only as far as . With engineering works on the upgrade of the West Coast Main Line, the service was shortened to terminate at Watford, and was discontinued, later revived as a shorter regional route as part of the South Central franchise in 2008. Due to congestion on the West Coast Main Line, the service did not run north of , and in May 2022 was curtailed to Watford Junction. Route From north to south, to line follows the following route with current and former stations, junctions with other railways and other features: The West Cross Route, one side of the Ringway 1 inner ring road, would have paralleled the line. Rolling stock Trains in scheduled passenger services on the West London line are as follows: Passenger volume These are passenger volume statistics for the line from the years beginning April 2002 to April 2013. The large increases in the year beginning April 2006 were due to travelcards for National Rail journeys being made available from stations with London Underground ticket offices, and also using a different methodology to estimate likely journeys made from National Rail stations in Zone 1. The large increases in the year beginning April 2010 were due to increased train frequencies helped by the introduction of new rolling stock. Shepherd's Bush opened 2008 and Imperial Wharf the following year. Future The Crossrail route planned to open in 2019 will form a new east-west cross-London route which will join onto the Great Western Main Line and cross the West London line south of Willesden Junction at Old Oak Common. A new station, Old Oak Common railway station, is planned at this site to provide an interchange between Crossrail, the GWML and High Speed 2. Due to the proximity of Willesden Junction, it has been suggested that an interchange could be added with the North London, Bakerloo, Watford DC and West London lines. A 2010 Department for Transport command paper highlights opportunities for interchanges at Old Oak Common with London Underground, London Overground and Southern's cross-London services, while a report prepared by Terry Farrell and Partners for the Borough of Hammersmith & Fulham proposes the construction of an overhead light rail, automated people mover or personal rapid transit system linking "Old Oak Central" with Willesden Junction. However, , no firm