Due for a Cleaning?

Exit sign for East California 116 in Petaluma

The button reflectors appeared to be dirty when this photo of the East California 116 exit from northbound US 101 was taken in July 2009. For fans of "button copy", that may be a good thing: the reflectors are visible despite the light of the late afternoon.

California 116 is designated on this sign as "East" because the route runs concurrently with US 101 for more than nine miles between Petaluma and Cotati.