Here's an simple / cheap example from my small hometown -
https://goo.gl/maps/e6N42cBBH582 (Google Street View is out of date, there are mid-rises on both sides of the freeway now).
It's green, it's safe, it's pedestrian / bike friendly and they are always at grade, so it's accessible. Cars only go 10mph (the distance is so short, they couldn't go much faster anyway). The freeway takes up almost no land -- it's just a single 1 minute walk to either side. Plant bollards at both ends to block the cars, and it's now 100% safety for everyone at all times.
Here's a really creative example from Seattle - https://en.wikipedia.org/wiki/Freeway_Park
> Any big grade change and long distance between buildings suppresses non-car use
I don't think that's inherently true, it's just the cheap way to do it. Freeways can be high density and pedestrian friendly too. They just usually aren't, for the same reasons buildings aren't -- it costs money.
Additionally, there doesn't need to be any distance between buildings to have a freeway. See Cobo Center in Detroit https://en.wikipedia.org/wiki/M-10_(Michigan_highway) or Washington State Convention Center in Seattle https://en.wikipedia.org/wiki/Washington_State_Convention_Ce...
It's green, it's safe, it's pedestrian / bike friendly and they are always at grade, so it's accessible. Cars only go 10mph (the distance is so short, they couldn't go much faster anyway). The freeway takes up almost no land -- it's just a single 1 minute walk to either side. Plant bollards at both ends to block the cars, and it's now 100% safety for everyone at all times.
Here's a really creative example from Seattle - https://en.wikipedia.org/wiki/Freeway_Park
> Any big grade change and long distance between buildings suppresses non-car use
I don't think that's inherently true, it's just the cheap way to do it. Freeways can be high density and pedestrian friendly too. They just usually aren't, for the same reasons buildings aren't -- it costs money.
Additionally, there doesn't need to be any distance between buildings to have a freeway. See Cobo Center in Detroit https://en.wikipedia.org/wiki/M-10_(Michigan_highway) or Washington State Convention Center in Seattle https://en.wikipedia.org/wiki/Washington_State_Convention_Ce...