Wroclaw
Map based on geography of a big polish city: Wroclaw. I managed to recreate pretty accuratly highway structure and a large chunk of railway network. It is extreamly flat and has no ship routes. Worth to say that whole map is slightly tilted to make easier managing the flow of relatively shallow rivers. This might also in some cases result in need to place own water sources under water collectors.
Few highways have no autoside connection beacuse of the limit. With 81 tiles mod and unlimited connections mod you can connect them yourself if it bothers you.
Recommend playing on premade theme mix used in the pictures: https://steamcommunity.com/sharedfiles/filedetails/?id=2813478597.