I35 through Dallas is a nightmare. Maybe rerouting the shipping traffic would be a Godsend.
They would have to split it up. I'd suggest rail lines and trucking lines to Dallas, then other traffic going AROUND Dallas. But I've done that before and it takes a LONG time to go around Dallas.
traffic around washington dc has become a mess in recent years. go to the DMV and you're practically the only american in sight.