405 postmile sign in Mission Viejo

[MarkF]

This has been there for as long as I can remember, at Trabuco and Modesto in Mission Viejo.  I wonder how it got there:


A postmile sign for mile 18 of 405 in LA county, which would be around the Inglewood Ave exit in Lawndale.  Can't tell what it is marking now.

[junglmonty]

I grew up right across the street from here and have always wondered why/how that got there. Would live to hear anyone's insight about this phantom postmile.

[Atomica]

Was it part of a temporary routing prior to the completion of the San Diego Freeway?  Or was that a post meant for another highway and it got mixed up?

[sdmichael]

No, the sign is not official in any way other than when it was originally posted on Route 405 in Los Angeles County. It is most likely a "prank" of some sort that was done long ago. Since it looks "official", maintenance crews most likely have left it alone since then.