Colorado often closes I-70 that sits at the bottom of a huge, long cliff - where rock and mud slides, avalanches are common .. Pro-tip , should have built it on top of the cliff..
Then Google sends semi- trucks, Greyhound buses .. over unpaved forest roads, high mountain passes with very tight corners .. An older woman with heart problems was rescued first followed by passengers, the driver and luggage on other vehicles.
Glenwood Canyon, by any chance? I drove through there, twice. Very scenic, but you can get rockfalls onto the roadway.