This diploma thesis gives an overview of public transport which has to deal with problems of utilization. Here, as an example, the line 6 was used, which is one of the busiest tram lines in Vienna. Since a re-compression of the intervals in the case of the line 6 is hardly possible, possibilities were identified in this work to relieve this line. Decisive for this work was an extensive literature search. In addition, expert interviews were conducted with the project manager of the tram line 6, as well as with affected tram drivers. First, all the basics and framework conditions are presented, which include, among others, the political mission of the city of Vienna and the network of Wiener Linien. Subsequently, a detailed overview of all public transport projects in Vienna are given. Particular attention is paid to line 6. To get a more detailed overview of the problem of tram line 6, a comprehensive problem analysis was carried out. After an inventory and subsequent selection of an appropriate section of the study, an attempt was made to describe the various influences leading to a decrease in performance and to point out any weak points. Subsequently, optimization measures were explained, which should contribute to the acceleration of the trams. Especially in urban transport planning, the demands of all types of traffic must be reconciled. These include, in addition to the urban planning matters, also traffic engineering, road construction, traffic control and operational matters. Referring to the extensive problem analysis, two sets of action packages were presented, which serve as an example of application for increasing the performance of tram line 6. On the one hand, this is the scenario with the structural or infrastructural focus and, on the other hand, the scenario with the traffic-centering emphasis. Finally, a performance modeling tool was developed, which calculates the utilization and the loss times of a line. In order to be able to analyze the route of a tram line, several test drives were carried out, analyzed and logged.