Two of the worst times I have been cut off were by semis. Once was on the rural interstate, there was a rest stop that a truck was leaving. Two lanes, I was in the right lane, another truck in the left preventing me from getting over. Truck entering the highway merged in well before the end of the accleration lane, right in front of me, going probably 25 MPH slower than I was going. Braked hard, avoided collision.
Another time a semi was trying to pass. His closing speed was fine until we got not an incline. The back of his trailer was barely past my cab, and he was slowing down rapidly due to the incline, he still decided to come into the lane I was in, and then immediately over to exit the highway.
I know we rely on truckers, but I am of the opinion that many of them drive like jackwads. Like when they decide to pass each other on a two lane interstate, the passing truck going maybe one MPH faster than the one in the right lane, and still 10 MPH below the speed limit. Causing them to hang in the left lane for a couple miles while all the traffic piles up behind them.
That is where I REALLY wish there would be a left lane minimum speed.
2012 RAM 3500 Laramie Longhorn DRW CC 4x4 Max Tow, Cummins HO, 60 gallon RDS aux fuel tank, Reese 18k Elite hitch
2003 Dodge Ram 3500 QC SB 4x4 Cummins HO NV5600 with Smarty JR, Jacobs EB (sold)
2002 Gulf Stream Sea Hawk 29FRB with Honda EV6010