The gameplay is focused on logistics, so those aspects have a lot more control. I particularly enjoy that in conjunction with the model railway aesthetics.
- You build roads and railways, and stations for passengers and cargo (road/rail/air/sea)
- You set up 'lines' to connect various stations, and you can specify what and how much gets loaded/unloaded at every station (or whether vehicles on that line stop there at all), and how long vehicles should wait for their cargo
- You buy each vehicle and assign it to a line, and in the case of trains you also buy each component e.g. locomotives, passenger cars, stake cars, hoppers depending on what your line needs to transport
The cities grow by themselves based on the passenger transport links with other cities and the level of goods supply. There's no zoning, building water pipes, schools, or anything like that. Just the minutiae of getting things from A to B via C to pick up some more things destined for Y and Z.
The economic simulation is incredibly shallow sadly. It's a fun game and excellent creation sandbox but it's not remotely challenging or engaging outside of playing model trains. imo.