Generally semi trucks are very courteous to me when riding on shouldered highways. They will move over to the next lane even when they do not need to. When I rode a 75 mile stretch of hwy 77 here the most obnoxious drivers were the Harley bikers followed by SUV drivers even with bikes and racks on the back. You would think that motorcycle riders would get it. On 2 lane roads in the country just about everyone is nice and allows plenty of room when passing. Now in my own neighborhood....different story. I almost got taken out by an Audi SUV when I had the right of way in a round about. I yelled hey as loud as I could and got a bug eyed reaction from the driver. She stopped very quickly and let me go ahead. It also never fails that even when I am going 25+ mph in a residential, drivers feel they have to pass a bike rider no matter what. Sorry to add my complaints, just had to vent a little. It just seems to happen in my own neighborhood. When I do my nightly ride into a nearby neinghborhood I am constantly waving at drivers who acknowledge me on the road and do not cut me off.