On the road in Rapid City South Dakota

Gillette Wyoming 150 BNSF engines idle at Donkey Creek Trains start at the two minute mark.
700 miles today, all on Interstate 90. Just past Gillette I happened to glance over and noticed more locomotives than I had ever seen in one place, but then in a flash it was gone.

Saw the smokestack in Anaconda Montana, a national cemetery in Sheridan or Gillette, I forget. Half a dozen truck stop /coffee dispenseries. Flashing lights in my rear view mirror. Got stopped by a Wyoming state trooper for going 84 MPH in an 80 zone. "We have the highest speed limits in the country, but they are strictly enforced." He let me off with a warning.