13G comes North on the Delmarva Sec. and can only go South onto Amtrak at DAVIS Interlocking which is right next to Newark Sta. and Chrysler Yard.Once on Amtrak it will head South to Perryville and turn North onto the Port Road(NS)and go to either Enola(across Shocks Mill Bridge)or take the Royalton Branch to HBG.
The NS-500 will bring the coal down from HBG via the NS HBG Line,use CSX from RIVER to Eastwick and onto Septa's R-1 Airport Line(CR Chester Sec.).Once the coal train is put away the power is kept on the Boeing siding 'til the Mty's are ready.
Depending upon if the lead unit is Cab Signal/LSL equipped or if there is foreign power or if the crew can't make it to Amtrak before 5am will determine which routing the 501 will take.The prefered route is South on the Ches. Sec. thru Stoney Creek Yd.,out the Linwood Branch and onto Amtrak at HOOK for a straight shot to PHIL,the High-Line,Belmont,River and back to HBG.
If the 501 has to use the Airport Line/CSX(aka the back way)then they will.It's a slower route but then again the crews are out to make Money!
Hope that helps.
I'm in Ridley Park so I get to see CSX on the Philly Sub,NS on Amtrak and CR's Chester Sec. is a mile away.