Basel has some 200,000 inhabitants and approx. 500,000 inclusive the surrounding countryside ("Baselbiet"). It is situated in the northwest of Switzerland directly at the German and French border. The tram network of the → BVB (Basler Verkehrsbetriebe)
and → BLT (Baselland Transport)
also passes to Germany and France. Altogether, the tram routes have a length of approx. 75 kilometres.
The outer branches to Aesch, Dornach, Pratteln and Rodersdorf are dedicated as railways and are operated by the BLT. As a compensation for the BLT-kilometrage in the city with its yellow tramway cars on the lines 10, 11 and 17 the line 14 is operated by BVB with its green vehicles.