I recently watched a terrific YT series from a couple cycling across the U.S. in '21. They were on a route across central Montana as recommended by Adventure Cycling (they had stopped in and were given this route as suggestion, do to some road closures die to forest fires). They found themselves on 2 lane roads with poor to no shoulders and as they described it, cars passing at 70mph and giving no clearance, even when there was no oncoming traffic. They were subsequently told by locals at a local diner "Oh, folks from Montana HATE cyclists". They reached Great Falls, packed up gear and bikes and flew to Kansas City to continue their trip.