Thank you Joel. I think UPS only did the no Left Turn (Mythbusters tested this) function, I have not seen or heard of it for anything else. I had delivery by freight and tried giving the trucker easier directions for drop off and leaving, but he took a route through the middle of Downtown and I didn't realize I gave him directions with a lower clearance and he must of had navigation to avoid that. 1. I would like a navigation to tell me "avoiding low clearance bridge, adjusting route" Whenever/where ever I drive I try to avoid certain lane changes, merging etc. Even at home I know where to go and merge that has easier site lines and open merge areas. Im trying to find a navigation that allows for that, and having a lot of trouble finding one that does that.