I did a brief stint in the transit industry, working on very large scale bus route scheduling & optimization. It's a tough problem to solve, but manageable as

I did a brief stint in the transit industry, working on very large scale bus route scheduling & optimization. It's a tough problem to solve, but manageable as long as you don't do something silly like drastically cut the number of busses and drivers because you are expecting the routing/scheduling system to work miracles.