If we have an urban development project with 3 or 4 highway engineer working on the roads, everyone make a corridor in the same region (same surface) , but we want to put all of the corridors together within one corridor in the end (or a single file at least), how can we do that?
As far as I know, there is no way to merge corridors into a single corridor. You can merge regions within 1 corridor but not separate corridors into one, unless there's a third party tool to do it.
Personally, I'd leave the corridors totally separate and paste the individual surfaces into a new combined surface. Much easier to manage. There's nothing worse than a single corridor model with all the roads in and nobody will thank you for it. Too heavy, buggy and a single error can bring the whole thing down.
Kevin