Cities: Skylines Deluxe Edition is the simulator game you were looking for. As mayor of the city you will have evolve your facilities as the population grows, which includes adding schools, fire stations, hospitals, controlling such essentials as water and electricity. All while making sure that the economy is growing. While placing roads you will have to take into account the number of vehicles as the transport system is fully fleshed put. Use your strategy in creating districts and passing policies. And of course, you can improve the maps and structures and later import and share them with the game which will become downloadable content for other players.