It’s quite simple.
Sprint, in training flats, 380m in 80 seconds. With people possibly in your way.
On the London Undergound Circle Line, from Mansion House to Cannon Street, the distance is only 380 meters, and it takes 80 seconds from the first door opening to the closing of the next door (don’t forget stairs and 2 payment turnstiles)
It looks deceiving on the map. Then again, the tube map is NOT TO SCALE. Try transferring lines at Charing Cross, for example! (from Bakerloo to Northern).
So, is this possible?
Take a look below.
(fast forward to 2:15 when the 1st door opens)
And now my plug for equality and human rights.
How about those in a wheelchair?
How fast can they do it? (Thank you Jeff Summers for pointing this out!)
For a guy who spends up to 2 hours of day walking around the streets of London going from place to place, I can tell you (like most of Europe) London is not a wheelchair friendly city.