I get the point that was made. However, US 29 is a major route and has more at-grade intersections with major roads(including major secondary state routes) where I-66 ignores those routes and only focuses on US and primary routes. Important roads (eg West Ox Road, Monument Drive, Blake Lane) get overlooked, which forces more people to get off at even busier exits(eg Chain Bridge, US 50) where Lee Highway has some apart grade intersections but not fully apart grade.