[david-gpu]

> The only alternative is

...or you could look at what is done in countries with a far better safety record and copy it. Hint: street design has a massive effect on the speed at which drivers choose to go. Narrower lanes, curves, intersections with tight corners, raised crossings, speed humps, removing on-street parking next to intersections (daylighting), etc. all reduce fatalities.

[HPsquared]

Ah yes the "ball pit" option. Sure it probably works but it costs a lot and reduces the utility of the roads.

[david-gpu]

It increases the utility of the streets for pedestrians and cyclists by, you know, not getting them killed.

Many traffic safety measures cost very little to implement, or even retrofit. You can look up what has been done in Hoboken, NJ -- no pedestrian fatalities since 2017.

[HPsquared]

Fair enough for dense urban areas, I suppose.