Adding highways isn't the only tool available to transportation planners. Isn't it interesting how some intersections bog down at any capacity, while others ar

Adding highways isn't the only tool available to transportation planners. Isn't it interesting how some intersections bog down at any capacity, while others are busy and still keep moving smoothly? There are types of lane and intersection designs which never seem to work well, and I'm surprised that more isn't done to avoid or eliminate them.