This is the Roberto Clemente Bridge (formerly the sixth street bridge) in Pittsburgh, PA USA.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/53969873@N00">Michael Righi</a> from Pittsburgh, USA
CC BY 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/michaelrighi/492098001/">Roberto Clemente Bridge</a>