The importance of not being in a hurry:
Although a slide over the highway might seem small by air, as above, on the actual road it is a mess. These avalanches, usually small because larger slips have already been released farther up the hill by avalanche control, shut down the passes for at least a day, often longer. All the trucks line up in tight ranks at brake checkstops, wide laybys or at Rogers Pass itself where there are services. Cars turn back, if they can, and try another, invariably longer route.