MONROEVILLE, Pa. — (WPXI) – Hanging wires snarled traffic for hours along the Pennsylvania Turnpike in Monroeville Wednesday. Police say it started when a semi-truck hit wires along the Northern Pike overpass around 3 p.m. The downed lines backed up traffic for miles. Officials say it was bumper to bumper for 7 miles in the eastbound lanes and 3 miles in the westbound lanes. The downed lines also led to a closure of the overpass itself. That’s where repair work was concentrated. It took workers a couple of hours to secure those downed lines – some hung over the turnpike in bucket trucks to reel them in.