The U.S. 77 bridge connecting Lexington, Oklahoma to Purcell has been closed due to structural issues. This is causing issues for the people in the towns (http://www.news9.com/story/24610099/bridge-closure-frustrates-residents-in-lexington-purcell), who now have to detour to Norman to cross the Canadian River on I-35.
This is a deck truss bridge.