There should be a law banning SLOW MERGERS. The people that think it's OK to try and merge onto a highway at 25 mph. Even worse is when they don't look over their should to see my 24,000 lb RV going 60 about to run them over because I can't stop or move over quick enough and they can't step on the gas.
When I first got my RV, I was worried about being the one merging onto highways. Turns out most people see you and get out of the way. The real problem is the people trying to merge in front of you at half the speed limit.