Some of the wires were rusted in two.

This is a privately owned bridge by Lowe's Motor Speedway. They are responsible for maintenance and any inspection that would be done to the bridge.

For corrosion, you need a combination of oxygen and moisture. At this point we do not know exactly how those items got to that steel.

He knew all the trip wires.

Emergency Valve Regulators," she repeated. "So you do know what your doing?
"Not really," he said yanking another wire. 'I made up that term to keep you happy. I'm just pulling all the red wires because they're the pretty ones.

You can see all the wires are hanging down underneath this section.