Since the coat of arms of Stuttgart shows a black, rampant horse on a yellow or golden field, the Stuttgart Stadtbahn as well as all the buses come in yellow with black window frames.
[citation needed] The bus network of the SSB covers Stuttgart and many neighbouring cities, with 54 different routes.
[citation needed] SSB's own bus fleet consists of approximately 250 vehicles, of which about 160 are articulated buses.
The bus fleet is operated from depots and yards at Gaisburg, Möhringen, Sielmingen, and Zuffenhausen.
Besides the SSB's Stadtbahn, tram and bus networks, this coordination includes the Stuttgart S-Bahn, operated by a subsidiary of Deutsche Bahn AG (DBAG), and DBAG's RegionalBahn regional train services within the VVS area.