I'm not.  Next time I have a reason to be in Broken Arrow I'll probably check it out.  The next city over from this, Tulsa, invented the yield sign, and while they're not used anywhere near as frequently as the MUTCD warrants (with yield signs being the preferred traffic control, with stop signs reserved for blind corners and "we tried everything else and nothing worked" situations, not "because we didn't think of anything else"), they are much more common in this region than elsewhere in the US.