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Are these the real life version of conveyor belt sidewalks the scifi autors wrote about?

Reminds me that a design company was pitching the conversion of the London underground into a network of conveyor belts.

5 lanes, 3 speeds, so that the ones closest to the edges were just about walking speed, while the innermost was somewhere close to a jog (or perhaps even a run).

Take that and multiply the width by a couple of times and you've got Heinlein's rolling roads.

Or Arthur C. Clarke's "moving ways" (Against the Fall of Night / The City And The Stars)

Sounds like Asmiov's "The Strips"

You can see those in airports already?

I actually see these boards in airports as lot as well.

But not on the streets :\

Not yet: http://www.slate.com/blogs/the_eye/2015/09/11/nbbj_proposes_...

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