[Melatonic]

Bike paths are indeed amazing and could of course work great for small little electric assist bikes, scooters, etc. That bike ride that drenches you in sweat might actually feel pretty nice if the electric motor is doing most of the work and now you are getting a nice breeze over you. Although 100F is pretty miserable regardless of what you are doing without AC - there may not be a solution to that other than highly cooled public transit.

[ZeroGravitas]

Once vehicles are outputting less toxic fumes, semi-enclosed outside spaces make more sense in both hot and cold climates.

Pedestrian subways is an idea overdue for a revisit as are bike routes that pass through parks and indoor malls.

Do any of these "city of the future" projects explicitly address this kind of thing? Seems kind of obvious.

Though I think its obvious that bicyles would be really handy in a zombie apocalypse (or any kind of apocalypse really) and that seems to be generally ignored by our modern culture too, preferring hot rods, trucks and helicopters.