Given the time that elapsed, any one of those drivers or the Comcast workers could have called police to flag traffic at the crest of the hill behind them, or gone and done so themselves. The Comcast guys were jerks, it was clear that there was a problem above and beyond their “rules.” Blocking a lane on the backside of a blind hill on an icy, snowy road was a recipe for disaster and they’re lucky no one was seriously injured or killed. This repair work could have waited until the road was cleared and treated.
The guy who posted the video says he called the police immediately after the first slide and they were called again after the collision.