The Moving Sidewalk

In the once-futuristic world of the Jetsons, the sidewalks don’t just sit there: they whisk people along to their destinations. Something like this still happens at many airports and even some amusement parks. Learn more about historical efforts to popularize moving sidewalks. Discuss with your team: why didn’t they catch on more widely? Where would you install them today, if you could?

At the 1900 Paris World's Fair, crowds rode a raised platform gliding in a great loop, gawking at the future. A century on, that future survives mostly as the tired glide past airport gates.

Key concepts

Infrastructure Lock-in: Cities were already built around ordinary sidewalks and cars, so retrofitting moving ones would be enormously costly and disruptive — the existing setup is 'locked in', making radical alternatives hard to adopt.

Every work — at a glance

The Jetsons — Hanna-Barbera, 1962 (cartoon)

The retro-future cartoon whose sidewalks whisk people effortlessly to their destinations — the popular image of the moving walkway as the shape of tomorrow.

+ 4 more works explained inside

What to know

01
Why didn't they catch on more widely? Because working isn't winning. The moving walkway functions fine, but it only earns its cost with dense, one-directional foot traffic on a fixed route; a city's movement is messy and many-to-many, so the technology is trapped in the few places that match its narrow requirements — and joins the nuclear car and food pill as a future that mostly didn't arrive.

Across subjects

There is a hard engineering reason: getting on and off. A walkway fast enough to be worth it is too fast to step onto safely, so high-speed versions needed

Theme connection

"Are We There Yet?"

A future that sounded this good never arrived. Why didn't moving walkways catch on, and should we install more? One side says the verdict is fair: costly, inflexible, solving a problem ordinary sidewalks handle. The other says we quit too soon — in dense settings they could help, and lock-in, not merit, kept them down.

Practice — a sample

SCIWhich of these old ideas is LEAST likely to prove Amara's Law right?

A The parking meter
B The video call
C The moving walkway
D The asphalt road
E The attached garage

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