I drove that I-80 section with my 22 foot Minnie Class C and it scared the bejeebees out of me and my wife. Stuck between the 2 K rails as we call them with what looked like 8 1/2 feet between them. I swear there were only a few inches clearance on the body and my mirrors stuck out over the rails. I proceeded thru at 20 mph with cars honking behind me. I think it was about the worst time ever driving the MH for me. I can understand the frustration.
Yup, the problem with the barriers was that they went for miles not just a short distance. And you are correct, the spacing between was tight. Most trucks, buses and RV's probably had about a foot on either side clearance and that is very little compared to what we are used to with 12 or even 11 foot lanes.
Makes me wonder about RVing in Europe where a Sprinter van is often considered a sizeable RV. Tight streets, narrow roads and highways. Mostly we have it real good here in America for RVs.