S1, E3: In the Rocky Mountains, winter storms bring extreme conditions, with up to 2 metres of snow daily from December to March. A recent blizzard caused a 200-vehicle pile-up, leaving 6 dead and 30 injured. Vital highways like I-80 and I-90 turn deadly. Highway crews like Scott’s work nonstop to clear roads, rescue stranded drivers, and trigger controlled avalanches to prevent more tragedies.