In 1971 J. Standard Baker Quoted " Drivers Towing Trailers  Are Four (4) Times As Unsafe As Those In Cars Alone! 

Runaway trailer causes traffic tie up on Florence bridgePosted 11:41 am, January 16, 2020, by WHNT News 19

FLORENCE, Ala. – A utility trailer came loose from a truck on the Singing River Bridge Thursday morning, causing some scary moments for drivers.

The trailer crashed through the fence on the side of the bridge and went over the side of the barrier, leaving it dangling above the Tennessee River.

Traffic was tied up on the bridge while the trailer was removed. Crews said the bridge was not damaged and the Alabama Department of Transportation was working with a contractor to replace the damaged fence.

Florence and Muscle Shoals police both responded to the scene.

Why did the trailer come off the hitch?  Once again as it is almost always the case the investigator will not do due diligence.

What size ball?

What size hitch?

Safety Chains Used?

Did the safety chains break?

Breakaway Cable?

Battery back up?

Under Federal Law violation?