Quote Originally Posted by Connor View Post
Most likely they just didn’t think of any lore reason to contextualise the need for a pass.
I think it's more likely that they thought about it but the usual excuses for closing a story-progressing bridge don't really work here.

The bridge can't easily be broken because its whole deal is how ancient and sturdy it is. And the other go-to would be turmoil or hostility in the neighbouring country/zone but that doesn't really fit the rest of the story either.