Hounslow Line

The  (/ˈhaʊnzloʊ/  hownz -loh), historically also known as the Airport Line, is an east-west rapid transit line of the Wentworth Metro network. It connects the Inner West suburbs and the namesake Borough of Hounslow, including Wentworth Bexley International Airport, via the Wentworth central business district.

Owing to its route through the city centre, the suburban districts of northeastern Wentworth and Bexley Airport, the Hounslow Line is very busy during its entire daily service, and is the metro's second-busiest line, with a daily ridership of 512,160 or 17.6 percent of network-wide traffic. Due to serving the airport stations, the eastern section of the Hounslow Line, between Shinjuku and Bexley Airport Terminal 1, has extended operating hours, with services stopping at 2 am instead of the usual 1 am. In addition, parts of the line have a maximum operating speed of 120 km/h, the highest on the network.

The line is coloured  lime green  on system maps.