Salem interlocking tower and Bridge Street in 1949, shortly before the Bridge Street overpass was constructed
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/68317878@N04">Salem State Archives</a> from Salem, Massachusetts
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/salemstatearchives/30662430318/">Boston and Maine Railroad Switch Tower, 1949</a>