Mobility and flexibility even without a car is an important locational advantage of Frankfurt. Although Frankfurt, with only 660,000 inhabitants, is ‘only’ the fifth largest city in Germany, approximately 300,000 commuters travel to work in the Main metropolis every day on work days. This figure is supplemented by countless visitors and tourists, who use the well-developed local transport network. In addition to the bus routes, many underground and suburban railways operate in local transport. In addition to the suburban railways, the regional trains of the Rhine-Main transport association are also available for trips into the surrounding area of Frankfurt.