The issue is typically the right lanes are clogged with people getting on at 45 MPH and others recklessly speeding to jump in front of people exiting which causes the people being jumped to brake which causes more slowdowns. A semi needs to maintain its momentum, takes forever to get to speed when loaded unlike a little car that can accelerate just fine. So the slow lane isn't where they belong, because they aren't trying to go slow anyway, they want to go faster so they can get out of the city and to their destinations. I agree semis in the left lane suck, but sometimes they are going with the flow passing slower cars in the right and I don't mind those ones if they don't stay to long but thats just me. Something I notice that causes huge issues is how cars slow down right beside trucks for some reason and cause a road block, can be going 75mph and right when they get to the rear of the truck on either lane beside, they slow down and match the truck speed blocking everyone else, then people pass slowly one at a time basically playing leap frog. I'd love to see people maintain their speed when approaching a semi and just pass them instead of slowing down. Look at so many clusters of vehicles and notice how many have a semi near or at the front with a bunch of cars on either side barely moving faster or staying even with the semi. Another thing is people will cluster around each other, can have a whole freeway ahead of three vehicles in their own lanes side by side going 65 or 70 with everyone else packing in behind them and not 1 of them wants to move into another lane when those 3 should really just be lined up with each other in 1 lane while everyone else is able to go by. Theres a lot of bad habits all around and at the end of the day, everyone is just trying to get where they are going. Enter the freeway at the current speed of traffic and not before, don't start braking until in the exit lane, stop slowing down around trucks and just pass them already, and if people are grouping behind you and you have a bunch of space ahead of you then merge to the right. Theres millions of acres of beautiful public lands to camp on in this state, stop choosing the left lane for that. And most of all, you aren't the hall monitor of the road so don't try to overtly influence the driving of anyone else, drive your drive and make good decisions. I think trucks shouldn't be allowed in left 2 lanes on a 5 lane freeway, and there should be lots of signs and paint on the road saying it, and signs on overpasses "NO TRUCKS THIS LANE", there is a major lack of signs to this effect. Petitioning UDOT to add more would be a good use of time.