I was imagining widening the roads and replacing crosswalks with bridges while holding everything else pretty much constant. I spent a month in a city like the

I was imagining widening the roads and replacing crosswalks with bridges while holding everything else pretty much constant. I spent a month in a city like the second picture, at a hotel for job training, and it was annoying that I couldn't safely walk right across the street to the stores over there, but if there were just some bridges it would've been fine. Something else that I've imagined would be cool is a system of skybridges mirroring the sidewalks. Maybe even in that case pedestrian traffic could be removed from the street level, so pedestrians and vehicles would be fully separated, working out best for everyone. Another interesting idea is a second network of roads on bridges that maybe go through buildings, which has happened a bit in a few cities. Unfortunately both of these ideas are probably too expensive in practice.