Related to the train/rail discussion earlier today, it looks like we finally have a confirmed location of the '...k railyard' sign from trailer 2:
I'm also wondering if the 'welcome' sign on the 4th street bridge (from the online trailer) is somehow related to the railyard, since it is very similar in design and located nearby. I have searched for real life versions of both signs without finding any.
Uh wow, good eyes!
Now can you find the building I marked up? Seems pretty distinct. I've spent quite some time looking for it around the LA River, but to no avail.