>>1031956All four of our light rail lines run along this route in the city center, which has only one track in each direction. That means the highest service you can get is one train every two minutes between Hauptbahnhof (Central Station) and Rathaus (Town Hall). On the individual lines, I think 5 minutes is the shortest headway you can get, but it might be a bit denser during football games, rushhour at the university or on lines 2 and 3 between the city center and the depot.