Arlington wrote: ↑Fri Jul 19, 2019 10:10 pm
I was assuming the AT would run on CSX (former RF&P to Long Bridge, not go to WAS, but go via Virginia Avenue tunnel and into the B&O to and through Baltimore via Howard St tunnel and the whole way to Philly on the CSX's B&O) always parallel to the NEC.
To lengthen the Auto Train further north you would have to increase the speed of the train all the way from Florida to D.C. as well. Sanford to Lorton is 855 rail miles, taking 17 hours to travel that far (4 pm departure with 9 am arrival). That leaves 7 hours a day to turnaround (unload and load) each train. It can take days for the Auto Train to get back on schedule after a significant delay, so that 7 hours turnaround is needed if for anything else as padding so that can happen. Some math = 855/17 = 50 mph average.
Let's add the 145 rail miles needed to extend the train to just short 9 miles to Philadelphia. At the average 50 mph, it would take 3 more hours. So it would now take 20 hours to travel that far (4pm departure to 12 noon arrival). Which would mean turning the train around in the unacceptable 4 hours. To get back to a barely acceptable 7 hours turnaround, the Auto train would have to travel 1000 rail miles in 17 hours. Some more math = 1000/17= 59 mph average.
Where and how are you going to find that additional 9 mph average on the existing 855 miles between Sanford and Lorton? How much will it cost? Then you have to take into account the maximum speed of the auto racks, which I doubt is much more than 60 mph - the speed the extended train to south Philadelphia will have to average.
Chances of ever achieving a working train schedule for the extended Auto Train = zero.