http://www.ridepatco.org/travel/camera.html
Non-Commercial/Personal Use Photography
No permit is required for non-commercial/personal use pictures taken in public areas. In general, for a paying passenger, traveling on PATCO from Station to Station, there is no specific prohibition against taking photographs in areas that are accessible to the public. Members of the public are similarly free to take photos from the walkway of the Ben Franklin Bridge and other Authority facilities that are open to the public. Any person taking pictures on, in, or of DRPA/PATCO property, including but not limited to, vehicles, bridges, facilities or employees must do so in the clearly defined public areas and done in a manner that would not interfere with the safe movement of people or operation of vehicles. The DRPA Police Officer or other Authority Official may allow the person to take pictures at the specific location under the following conditions:
Circumstances indicate that the photographer(s) does/do not pose a security or safety threat nor will cause disruption of the operations of the Authority;
and
The picture(s) is/are for personal or educational use only (e.g., tourist, railroad enthusiast, student, artist, etc.).
The exceptions the Authority makes to this policy are situations that compromise the safe and secure operation of its facilities, or the involvement in commercial activity. The Authority reserves the right to prevent a member of the public from taking photos and ask for identification.
Non-commercial photographers are prohibited from using tripods, monopods, wiring or any equipment that may have an impact on the safety of customers or employees. Non-commercial photographers are further prohibited from interfering with the free flow of commuters or disrupting pedestrian, train or vehicle traffic in any manner.