The sign's at the other end of the block from the dog path.
That section of TTL is parallel to the dog walk, on the other side of the row of buildings. It's closer to the dog walk than the place Zimmerman claims to have left his truck.
From the sign itself to the southern end of the dog walk, is a walk of about 150 feet, around the southern end of the row of buildings.
Is there something Zimmerman said that referenced that particular sign?
The sign identifies Twin Trees Lane. It's close to the dog walk Martin was presumably last seen headed down, and to the back entrance Zimmerman said Martin was headed toward. Zimmerman's vehicle was pointed in the direction he would need to drive to get to where he could see it.
The sign at TTL and RVC, near the clubhouse and the main entrance, is closer to where Martin was presumably last seen. (See here
) It's about 450 feet, while the one at Long Oak Way is about 500 feet. But it's arguably further from the overall scene of the action, and Zimmerman would have to make a U-turn to drive back to it, assuming he was telling the truth about the direction he parked.
In any case, Zimmerman presumably knew where that street sign was. He claimed to have just driven past it.
If Zimmerman wanted to give the police an address where his truck was parked, which was also close to where he claims to have last seen Martin, he could have done it without getting out of the truck. He could have driven around the bend of TTL to where he could see the street sign at Long Oak Way. Then he could have turned around, driven back and parked in front of 1211 or 1221.
Of course this is all fantasy. The dispatcher didn't ask Zimmerman where his truck was parked until almost the end of the phone call. Zimmerman had left the truck, agreed not to follow Martin, said he wanted to meet the police, and given directions to the truck, before the dispatcher asked for the address the truck was parked. By Zimmerman's account he was on RVC by this time, having gone there looking for the address he had not yet been asked for.
Also, it would be helpful to show a wider angle so the location of the sign is in context.
It's harder to see the sign at less than maximum zoom.
How hard is it to find the intersection of Twin Trees Lane and Long Oak Way? As I am not the first to observe, the neighborhood only has three streets.