Rail damage marker

[Green]

Is there a way to find out that the the railroad was damaged?  (France '40)
I cleared the area around the damaged railroad bridge then I bring some engineer units there for bridge ops. Then I moved units from the rear to forward and they failed to cross the engineer bridge. So much effort only for the note "Rail line has been damaged". The line was damaged on other side of the canal in the hex there my units was some turns.

Damaged rail lines are marked on the map with a hazard symbol (An upside down triangle with an exclamation mark). A smaller version of the same symbol but with an added red circle, is used to show a damaged bridge.

If your engineers have build a bridge, units should be able to cross but not using rail movement. Damaged rail lines cannot be repaired during a game so a damaged rail bridge cannot be repaired for rail use.