There are situations where they can mix reasonably well, but it means making the roads uncomfortable for driving, something few authorities are willing to do. I

There are situations where they can mix reasonably well, but it means making the roads uncomfortable for driving, something few authorities are willing to do. If you look at Autoluw streets they are narrow, have lots of visual obstructions (trees, etc.) and are the kind of place you only drive if you really need to. Which is why they're such nice places to walk!