Rare sight. PTV - Passenger Transfer Vehicle in Montreal International Airport

Strange looking machine in Montreal airport. Seen on Feb 10, 2022. Rumour has it, Montreal is the last city to still use it.
The mobile lounge was an innovative feature of the Washington Dulles terminal in 1970s. Dulles's designers thought that by shuttling from the main terminal directly to a midfield jet ramp, they could save passengers from long walking distances amidst weather, noise, and fumes on the ramp. The advent of the jet bridge and construction of the two midfield concourse buildings at this airport negated the benefits of the system.
Early in the space shuttle program, NASA used the same system of mobile lounge to move astronauts directly from the orbiter to crew facilities.

[@robertandrassy3813]

When I was a child, I thought that this is the future. Boarding an A310 felt like boarding a spaceship. I'm sad, that they don't really use these anymore.

[@curiosities-world]

I know exactly how you feel, but somehow it still doesn't get old for me. I love flying