small/medium ones have been built all over, to help with bottle neck and extend cushing oil center's reach. others have been upgraded.. obama set back system 10 years, but in last 2 output has increased,  just has a bottle neck for Bakken and Perriman shale areas. Should be fixed in next 2 yrs... then we have gas out the wazzo, LNG to ship over seas and more oil to take care of USA needs. Follow Phill Flynn out of chicago, and he can give you sites for oil reports, and infrastructure issues.