Here’s a little animation showing the logic of diverging diamond interchanges, which came up in class last time. There are a bunch of these explainers online, many produced by departments of transportation trying to head off driver terror and/or protests in the months before such an interchange opens in their jurisdiction. I picked this one because it shows the arduous route any pedestrian would have to take to get through. But as there are commonly few pedestrians at such interchanges, the faster, safer throughput for cars probably makes it all worth it. So long as the signal lights don’t go out.