Thanks for the info and the link. That's pretty interesting about the addresses being a mix of including and omitting the West prefix in between Sawtelle and Lincoln. My understanding was that Culver City didn't have any directional prefixes at all for streets within its limits. That's why similar streets like Sepulveda and Jefferson drop their prefixes when they cross from LA into Culver. But even Culver City's own interactive parcel map seems to have a mishmash of prefixed and non-prefixed addresses along Washington (which I hope/assume match those in the LA County one)! https://gisproxy.culvercity.org/Html5Viewer/index.html?viewer=ExternalInfo.ExternalInfo.

It kind of seems like no one really knows the actual street name here for sure haha. Maybe that's unsurprising, as Washington threads a strange needle of Culver City's borders where parts of some of the adjoining lots are actually partly in the city of LA. With that in mind, I would tend to favor the signage on the ground, which omits the "West", and is more consistent with the other major streets in Culver City limits. But based on this info I no longer feel terribly strongly about it either way. 

Thanks for looking into it, and for fixing the westernmost portion, which as you said definitely follows the Venice addressing system starting at zero from the beach and thus has no West prefix.

Best,
Will