Artwork in Allentown. Pittsburgh Regional Transit (PRT) SD-400 no. 4253 is seen at Warrington Ave / Beltzhoover Ave as it makes its way over Mount Washington via the Allentown Line.

PA Transit. Pittsburgh Regional Transit (PRT) SD-400 trolley no. 4253 is climbing the single-track arm of the Panhandle Bridge, as seen from the Liberty Bridge above. Due to ongoing lon... (more)