Have you ever heard the term, “snow shed” and wondered what it is? Well, it’s not a place where we keep extra snow. Actually, it’s more like a tunnel – a concrete cover built over the road to protect traffic from avalanches.Snow sheds are designed to withstand the incredible forces involved with vast amounts of sliding snow, however they’re not meant to stop it. Instead, the sheds deflect the snow, allowing it to pass over top while traffic continues to flow underneath. Rogers Pass is known for its winter snowfall, which amounts to about 10 m/ 33ft per year. Because of steep mountains, avalanches are very common in winter. To keep the Trans-Canada Highway open during the winter, the Royal Canadian Artillery uses 105 mm howitzers to knock down the avalanches under controlled circumstances so traffic is not caught in unexpected avalanches.
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