The Verkehrs- und Tarifverbund Stuttgart GmbH is a transport association that coordinates the local public transport in Stuttgart, the capital of Baden-Württemberg, as well as in the neighbouring districts of Böblingen, Esslingen, Ludwigsburg and Rems-Murr, and parts of Göppingen and Ostalbkreis. The network ensures uniform conditions of carriage and fare regulations as well as a coordinated timetable. It cooperates with the administrative districts and municipalities as well as the Verband Region Stuttgart.

Stuttgart Region is an urban agglomeration at the heart of the Stuttgart Metropolitan Region. It consists of the city of Stuttgart and the surrounding districts of Ludwigsburg, Esslingen, Böblingen, Rems-Murr and Göppingen. About 2.7 million inhabitants live in that area (3,700 km2). In fact, with 708 people per square kilometre, the Stuttgart Region is one of the most densely populated areas in Germany. Stuttgart Region is governed by a directly elected parliament.