The pressure on the drivers builds and hot tempers flare as the temperatures plunge to 55 below. See more in Season 4, Episode 6, "Danger at 55 Below."

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In "Ice Road Truckers," a tenacious group of long-haul truckers haul vital cargo to remote communities over some of the most dangerous routes in the world. For these truckers, life is a non-stop ride over thin ice.

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