The collapse apparently was the result of a collision between the tractor-trailer's cargo and the bridge, Washington State Patrol Sgt.

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Using recycled-steel frames with large hinges, Blu homes fold up to fit on a standard tractor-trailer that handles cargo up to 8.5 feet wide.

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Ram's heavy duty 2500 and 3500 models come with a rear-facing camera built into the center-mounted brake light behind the cab that can beam images of a trailer or the cargo in the bed into the truck's dashboard screen.

WSJ: Pickup-Truck Drivers Still Work Hard, but in Comfort