Golden Gate "Zipper Truck"

There have been 128 head-on collisions on the Golden Gate Bridge over the years, resulting in 16 deaths. Part of the problem is the "suicide lane," the center lane of the bridge which is reversed during the day, carrying an extra lane of traffic into San Francisco in the morning and out of the city at night, responding to rush-hour traffic.

The video shows a "zipper truck" that can move 3,500 barriers that weigh 1,500 pounds each along the length of the bridge in a matter of minutes.