该线路24小时全天运营,也是纽约地铁、PATH及芝加哥地铁以外美国唯一全天运营的系统。 Graham, Troy. Man attacked, robbed in Mellon Center concourse. Philadelphia Inquirer. January 7, 2011 [January 27, 2011]. (原始内容存档于2011-07-26)
(页面存档备份,存于互联网档案馆) Available indoor views of public transportation facilities as airports and railway stations and transportation museums All the available photospheres