SEPTA Market-Frankford Line Trains & An Emergency Response In Philadelphia, PA

Four SEPTA Market-Frankford Line subway trains 🚇 with Adtranz M-4 cars going to & from Frankford Transportation Center along with an emergency response twice in Philadelphia, Pennsylvania while I was taking a short walk in the city before returning to a university sporting event 🥎 nearby & seeing my friends on the opposing team. This is what I hardly ever catch anywhere but it's been quite a while since I last rode the MFL.