Sorry Utah drivers... This is what I found on the web about you:
( I say you because I got my license in Idaho, therefore I am NOT a Utah driver :) )

In Utah, if you want to change lanes, don't put your blinker on. For, you see, a blinker doesn't signal your desire to change lanes. It actually means the vehicle in the next lane over should immediately speed up, in order to prevent you from getting in front of him. Do not be surprised when you see lots of middle fingers pointed your direction in Utah. But take heart, for when you arrive at your destination (likely the church Halloween party), you will discover the other driver is actually in your ward. You can thank him personally for the nice, friendly greeting he sent you on I-15.