It is good to mention that in the Train Fever (TF) economical system the goods, produced by the heavy industry outside your cities and delivered to the industry quarters inside your cities, are intermediate goods, not consumer goods. The local industry (each individual factory is counted) in the cities needs these intermediate goods to operate and grow. The production of consumer goods by the local industry is TF an abstraction. In the TF economical system the local industries demands, beside their yearly needed amount of goods, the population (also individual counted) as labour force. So in return of consuming the intermediate goods the local industry creates jobs, thus keeping and attracting inhabitants, but also commuters from neighbouring cities.