I am now at 1950, 250 millions and an annual income of 10 millions.
I basically update all cargo routes with new trucks (and sold the surplus trucks) and connected all cities with train lines. I basically have 5 main rail lines, each one connecting 3-4 cities with 2-3 trains and a frequency of 5 minutes. They are generating from 0.5 to 1.5 million profits. One is in the middle (Barricella-Giglio), the I have thre lines on the west (Pazzirrino-Poppiti, Giglio-Pitigliano, Giglio Bulzi), one in the east and two in the south.
All cities have intra-city busses, all operating around 60-90s frequency and most generate a 30-50K loss.
Cargo lines are by truck and all in the positive with two generating 1.5M each.
City growth has been mostly linear: I now have 5 cities above 500 with Pazzirrino at 700 being the largest city. The only city that is now growing fast is Giglio which is connected to 3 rail lines. I wonder if it is beneficial to have a more intricate network (e.g. allowing each city to be connected directy to all its neighbors).