This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Signal Bridge near th Street Station. en Railroad signal bridge near Philadelphia th Street Station own CTLiotta cczero Uploaded with Railway signals in the United States th Street Station November in the United States in Philadelphia in rail transport in the United States Railway signal gantries Position light signals