Building a pedestrian over or underpass is another story entirely, had to force the game to do it and even then I somehow managed to place a path that looked like it was going through the roundabout, but somehow it wasn’t
When did you last play? I literally just played the game and sometimes just didn’t place some services- I think a good tip rn is just advance from a small city quickly, as later in the game it’s broken and gives you unlimited money as your people somehow make insane amounts of money. But in the early game advancing is your friend to gain cash from the advancements