Looking north, the stop sign is edge on. I don't know if that makes the street sign on top of it literally invisible, but it makes it harder to find.
Of course this is exactly why it could not be read from GZ's position, if he could read the sign at all inside or outside of his vehicle, he would have read Long Oak Way which would have offered no help for identifying his location.
Why do so many anti-GZ have such trouble accepting the obvious? George got out of the vehicle to determine which direction TM ran, as he stated numerous times he continued along the path to obtain an address from the RVC building closest to the entry of the crosswalk... why? again simple; the police were instructed to call upon their arrival, George had a HABIT of telling arriving police which of the two gates to use for entry... (check his old calls) armed with his physical location and the address from the RVC side of the crosswalk arriving police would come to him.
I believe GZ also walked through admittedly or not with the express purpose to look and see if TM ran out of the complex through the south gate.
None of the above is illegal, wrong, dangerous nor places either individual in danger.