Maybe it takes Toronto Chief Planner Jennifer Keesmaat or Dr. Who to figure out why Canada’s first-of-its-kind Diverging Diamond Interchange is better than any other. The DDI has just gone into service in Calgary at the corner of McLeod Trail and 162 Ave. It comes complete with a YouTube video explanation of how it works from the City government. See if you can follow just why the DDI is so much better than any other four-way interchange with overpass and with stop lights.
