An escape route is a path or plan of action used to leave a dangerous or difficult situation. In this crossword, the solutions EXIT (4 letters), VENT (4 letters) and TUNNEL (6 letters) are all components of an escape route. An EXIT is a doorway or other opening that allows one to leave a building or area. A VENT is an opening in a wall or floor that allows air to pass through. A TUNNEL is a long, narrow passage that is dug underground. All three of these solutions can be used as part of an escape route.