The Zipper Truck Lifts Thousands of 1,500-Pound Blocks in Minutes [Monster Machines]

For years, San Francisco's iconic Golden Gate Bridge was a deathtrap. Cars would zip past one another at 65 MPH, separated by a thin line of yellow traffic cones, and head-on collisions were routine. However, a new barrier system—laid by a massive vehicle known as a Zipper Truck—will keep passing drivers from landing in each other's laps. More »

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