Ed, good points indeed. I wonder if anyone has a piece of historical evidence that would make this all more relevant to what is there today. Or, the entire posting could be reworked to reflect the current configuration of the site. This is one of the many locations where there are "no historical elements visible".
After thinking this over it might be more likely that the entry was wrong in the first place and should have read 'AT&SF over Hawthorne Blvd.' I know that sometime in the distant past the crossing of the railroad and Hawthorne Blvd was changed. I have lived in the area since 1980 and nothing has changed since then. Just from the look of things I would say for sure that the AT&SF overpass at Hawthorne is not from the 1920s. I would imagine that it was rebuilt in its present form in the 1970s or 1960s.
It hasn't been there for decades. Instead of Hawthorne crossing over the AT&SF, the AT&SF now goes over Hawthorne Blvd.
I do not see any evidence of removal/replacement in Google images from 2007 or Bing images from 2008. Interested in current status.