Calgary’s first diverging diamond interchange credited for significant decline in serious crashes - Calgary | Globalnews.ca

Cool! There's one under construction in Niagara Falls, 403 @ Glendale.

As the article says, the neat benefit of this style of exchange between a cross-road and a highway or major artery is all of the turning is removed from the signalled intersections, which are reduced to simple stop/go alternating traffic flows; most crashes at signalled intersections happen when cars are turning and crossing a traffic stream.

I’m very glad this overpass has reduced accidents. That is, of course, the goal. I do, however, reserve the right to hate this overpass.