Yeah, I don't get how people find this 'revolutionary'. To me it's more like 'common sense'...
There's lots of perfectly usable space beneath overpasses, guideways - why
wouldn't you want to use it?
No reason why you couldn't use the space under the viaducts, bridges, guideways etc. for buildings as well as parks: retail, maybe even light industrial? Nightclubs, with the viaduct as the roof? Permanent exhibition/performance space?
Heck, you could even make an interesting upscale restaurant by closing off a space underneath the viaduct with glass; call it "The Viaduct" and you've got a great name and a great urban-retro-futurist concept to work with
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