Moleville is a thriving metropolis with no roads, no highways, no bus stations, no trains and no arcologies. The only means of transportation for these 250,000+ happy sims is a network of subways under the entire city. For every tile zoned residential, industrial or commercial, a subway station is no more than three tiles away. Moleville has no economic problems since the city was started with a negative interest bond using the double fund trick. Moleville is also not cluttered with water pumps and storage tanks yet the sims never complain about a water shortage.