Abstract
The Basel tramway network is a result of a merger between the city network in 1895 and the later integration of suburban metre gauge lines. A significant event was the integration of the important railway line from Leimental in 1986, together with its conversion from railway to tramway in its rolling stock and operation. This metric network is the most important public transport system in northwest Switzerland - transporting 120 million passengers annually, and is described in detail in this article.