A lot of that can be solved by law too. I know a lot of Americans would see this as an infringement of their freedoms but it’s quite common in other countries to place the order of responsibility to the most vulnerable to least vulnerable. What I mean by this is that cyclists need to give way to pedestrians, and cars need to give way to cyclists and pedestrians. I’ve never quite understood the logic behind jaywalking laws because it penalises the vulnerable rather than places greater responsibility on those who are least vulnerable.
It's useless to build a straight road, 4 wide lanes, then stick a sign on the side going "pls no speederino". The roads and the streets themselves need to be designed so that they do not allow unsafe use. Meaning any road/street shared by pedestrians needs to have narrow lanes, few lanes, sidewalks separated by e.g. a row of trees, speed bumps and raised crosswalks, bollards separating lanes, chicanes, etc.
That's already the norm in the UK. To be honest I'd forgotten many residential roads in the US were dual cartridge ways. That does make things more tricky.
