Someone posted the link to this site on my FaceBook:
Worst Corridors - INRIX
From what I gather, it seems quite accurate in relation to the cities in which I've lived [Dallas, Orlando] and those I travel through/around often enough to be familiar with them [Birmingham, Atlanta, New Orleans] to recognize the bottlenecks.
Hope this helps in your trip planning!
John E. Baker, III and Sally Baker... The Traveling Siblings! — Watch your tail swing... Keep the greasy side down and keep it 'tweeeeeeeeen the ditches, Y'all!