The cache is not located at the posted coordinates, or accessible from any expressway or freeway.
A (virtual) visit to these three points should provide you the information you need to identify the final (central) location.
N 37 32.538 W 122 20.877
S 10 27.730 W 36 48.269
S 21 41.264 E 124 37.574
Street parking can be a problem here; you will likely have to find parking a block or two away and walk to GZ. Be alert for heavy traffic when you cross over.
You can validate your puzzle solution with
certitude.