Ha! .A posted secret, labeled "secret" on a bold background none the less. Pssst, don't tell. If you go further I wonder if there are any "super duper" secret signs. Now that would be a cool shot...if you could live to post it.
Normally I might try to make some comment about cropping out and blocking parts of the sign....but hey, since it's a secret.
Got to be the worlds best road-sign, huh? Apart from one I saw in Italy that is. Subject is a bit loose for me - the past? To an extent, and it is at least a different approach from others.