I just completed a visit to family which started with 2 days getting there and ended with 2 days getting back by road.
I went up thru Laramie Wyoming then continued north thru Medicine Bow Wyoming and the Shirley Basin to Casper where I joined I-25 up to I-90 west to Seattle.
Medicine Bow is where the guy who wrote the first western 'The Virginian' lived. It was a railhead for cattledrives and you can see the different vegetation from the stockyards south of town on Google Earth.
The run up was 1328 miles. Moving average speed was 65 mph, trip average was 56 mph.
My stops were very brief and I normally ate standing up in order to stretch while out of the seat. Note that speed limits in Wyoming and Montana are 80 mph and even though I drove those speeds, the average still wasn't very high.
I listened to my police/fire/air/snowplow scanner and for this trip ventured to re-install a CB radio out of curiosity about current use.
The trip back was 1334 miles. Moving average was 65 mph and overall average was 58 mph.
This included a stretch of 40 mph whiteout driving from about Sheridan Wyoming to Casper Wyoming.
Was really glad to be in a 4WD with new aggressive tread tires.
The CB was rarely heard to break squelch. Even the scanner that was checking all the CB channels rarely had anything on any CB channel. The most activity I heard was in Laramie where the local dump truck drivers were heading out in the morning. I heard exactly 1 conversation between 18 wheelers the rest of the time. I also heard one trucker unsuccessfully trying to use it to notify another one of a flat tire on his trailer. There was not a word from oncoming trucks in the whiteout or about the whiteout. The scanner informed me that WyDOT was closing roads around the area.
Here is a link to my dashcam clips of the trip both ways. The whiteout portion begins at 5 minutes into the video.