know much about these escape routes?
I'm afraid I don't know very much about these routes...
All I know is that most airlines flying over mountainous terrain should have published escape routes in their operation manuals. In the event of a depressurization, engine failure or anything that could jeopardize flying safety, the escape route can provide pilots with a list of routes they can use to navigate the aircraft past the mountains and towards an available/usable aerodrome. I haven't seen an escape route map myself, but I'm guessing it would contain a wealth of information including escape route lengths, magnetic headings, enroute MSAs, navaids and aerodromes etc.