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A whiteout pile-up scatters heavy I-beams across the highway, testing James and his crew; Kevin must lift a 20,000-pound chunk of steel off the road.
Kyle tangles with a wreck that will prove if he's got what it takes to lead the team; Sonny heads to the scene of a violent jackknife.
During a spring storm, Steve cleans up a fuel spill blocking the 400, while Sonny struggles to keep the alternate route moving; John Allen recovers a loaded semi that went for a wild airborne ride.
Government agencies work together to keep traffic flowing on Ontario's mega-highways when ice, snow and big-rig accidents threaten to close them down.