And I don't think it's ever going to get easier to capture. When the sun is higher in the sky, to light it up, the leaves will obscure it.
On Vine, just north of McMicken. Visible, as you're coming down the hill.
I first saw this about two months ago, but didn't get the photo until yesterday. Yesterday, I drove up Vine, saw two more signs between McMicken and Liberty, and two more, (besides this), between McMicken and McMillan. The light must have been just right.