Happens every stinking day: I take the West Temple southbound detour at the 900 S West Temple interchange. At the point where we meet up with west temple again, as I am southbound, I DO have the right of way.
With VERY FEW EXCEPTIONS, traffic traveling south on West Temple (who have a clearly marked Yield sign!) never slow down and some have even flipped me off because I (safely) made the turn (or sometimes rolled to a stop because they were clearly not observing (or even aware?) of the yield sign.
I believe that additional road markings, or flashing lights (or SOMETHING other than leaving it as it is) is badly needed here. I have nearly been hit several times.