Would Someone Please Tell Me What the 'Ropeway' is

One day Sock Monkey was planning to go on a guided walk from Nunhead to Crystal Palace. Crystal Palace is where Sock Monkey Mansions is so I was going to get myself to Nunhead then walk the 4 miles home.

So Sock Monkey did what everyone in London does and consulted the TFL website to see the train/bus timetable and the best route. NB whoever puts the 'best' journeys into the TFL website knows jack shit. You get some very eyebrow raising suggestions. Like the time Sock Monkey wanted to cycle from Camberwell Green to Waterloo. I thought that cycling up Kennington Road would be the best way. TFL suggested cycling up Walworth Road and over the Elephant & Castle Roundabout. To non-London people the Elephant & Castle Roundabout is known locally as "The Cyclists' Graveyard". I was close to insanity when I arrived at Waterloo.

Anyway. This is what TFL suggested:


Take the 'Ropeway' number 14609 from Crystal Palace to Nunhead. Please note that this mysterious service runs in a completely straight line from Crystal Palace to Nunhead, doesn't follow any roads or railway lines and goes through buildings.

What the Hell is the 'Ropeway'? Is it a zip wire? Is it a secret tunnel? I showed TFL's suggestion to my friend. Her husband works for TFL and he had a look at it. His opinion was, "Eh??" until he saw the diagram. Then he decided it must have been a bug in the system.

However Sock Monkey prefers to think that the Ropeway, like Brigadoon, only appears once every hundred years.