This was too easy for me since I was just there a couple hours ago.
Tony Luke's in South Philadelphia, on Oregon Ave. right off Front St. If you're heading down I-95, just get off at Oregon Ave. and it's right there. They are most famous for their cheesesteaks and Italian roast pork sandwiches with sharp Provolone and broccoli rabe; I had one of each earlier so I'm stuffed. But they also have good chicken cutlet sandwiches, very good veal cutlet sandwiches, hoagies, thick juicy burgers ...other stuff, it's all good.
See, it's right by the roadside: