I used to ride NJT, SEPTA, PATH as well as Amtrak, with just an ID card. (Passes kind of faded away, with the loss of "private" PAX service. Railroads now issue ID's, and Engineers Certification Cards, for ID). Most places were accepted, as you are all "brothers", so to speak. In the late 80's, the carriers started issuing vouchers, used to purchase tickets, for PAX travel. (no money traded hands, our vouchers were filled out by the TM, with each destination already marked. this was used to bill the issuing carrier) I managed to "obtain" about a dozen blanks, and carried them for emergencies. Even with those vouchers, we were still allowed to ride for free, in a "deadhead" car, if one was in the train. I was rarely asked for a ticket, and only once, or twice, had to actually produce a voucher, or ticket, to travel. I "deadheaded" as far south as Atlanta, from NJ, and as far west, as Chicago!!! Those vouchers were a "must have" for long distance travel. No PAX service here, so I don't know if it still works that way, or not. Regards