I'm playing as Hiawatha so borders should act as roades, and they have till now. Suddenly all trade routes broke? Why? Does the trait become absolete at som point. CivPedia only tell me mostly history.
Borders do not act as roads. Forests within your borders act as roads. Sounds like you may have an automated worker or accidentally broke the chain of forests that lead to your capital.
Go into strategic view and enable the trade routes overlay. All forests/roads that form routes should be highlighted in yellow. I think it also highlights the city tile itself in yellow if it's connected to the capital, and doesn't highlight it if not.
Nope not connected though i got my forests, something is wrong.
Nope not connected though i got my forests, something is wrong.