IIRC, Sweden has had a "zero pedestrian deaths" goal for the last 10 years or so. Part of that policy was road design, but another pillar was the reduction of urban speed limits to 18 mph, and vigorous enforcement of such.

The number of accidents did not drop substantially, but what did drop was the severity of the accidents. An accident that would have been a fatality in the past is now a broken leg or two.