Navmesh: One way navmesh so that agents can only walk in one direction

How can I enforce/create one way lanes within a navmesh? So that the traveling direction is restricted?

cc @Cedric

This is not something possible at the moment.
You can simulate that behavior agent motion is handled with a different code path.
Or, you can discard path that get in that tunnel. Debug path are oriented so it’s possible to compute the direction for segment passing by these sections.