You might be interested in what I'm setting to out build. I'm working on Archapolis, a city builder with real time traffic simulation and interior views of peoples homes (which you can customize/build yourself if you want). While the game wont scale up to the country scale, I do want the player to have a more hands on approach to managing the city. Im thinking it would be cool if the player could hire their own board if they wanted to, otherwise they would have to manually manage that aspect of the game (e.g. no fire marshal could mean manually sending out fire trucks to fires, scheduling building inspections, etc).

Here's a tech demo of what I've been working on: https://www.youtube.com/watch?v=7q0l87hwmkI

I created a path finding algorithm that can simultaneously path 300,000 units to random destinations at a comfortable frame rate. Units can choose from any of the shortest paths between two points (there are many in a grid), and from those paths, can also choose the path that matches any preferences they have.

Very early stages of development still!