Runway 18 West (German Startbahn 18 West) is a 4000-meter-long runway that runs from north to south on the western edge of Frankfurt Airport. A small northern portion of the runway is located in the Frankfurt district of Flughafen, while the larger southern portion lies in the Rüsselsheim am Main district. Before going into operation in 1984, the runway met with considerable opposition, becoming an important symbol of the German environmental movement in the 1970s and 1980s.