The current railroad choked on the increasing ridership. The system actually doesn't have much slack at peak hour. This is an argument for a much harder look at what capacity we would desire for the future.
I combined the inbound morning Airport, Newark, and Media/Elwyn timetables and noticed that the shortest time interval between arrivals at 30th Street Station is three minutes, with the R1, R2, and R3 arriving at 7:30, 7:33, 7:36 respectfully. Other than that, there are mostly four, five, or six-minute intervals on arrivals at 30th Street between those three trains. (I grouped them together because I knew they arrived at the same platform). Is that three-minute interval between trains the smallest that SEPTA can risk without risking one late train holding up the system? For those who work for SEPTA or DVARP or who understand how capacity works, I'd love to hear from you.
Where is the capacity tightest, and where is there room?
If gas prices ran up quickly, SEPTA will not be able to do much to alleviate the pain. There won't be room on the trains.
Maybe SEPTA shouldn't be so keen on scrapping the SL II's and III's when the SL V's roll onto the SEPTA main.
Also, we should think hard about through ridership and reverse commuting...
Definitely reverse-commuting, but don't forget off-peak. Most of my train travel is actually off-peak. I'd take the fictional R3 to classes at West Chester U. from Media during off-peak hours.