Ambiguous sign

While flipping through Social Media a little while ago, I noticed a post my brother-in-law Craig shared. It took me a few seconds to click with what was going on, and that is because of ambiguity. Like the driver of the truck in the picture, I thought of the color green right away. After a moment, I realized it was green as in environmentally friendly parking, like a Tesla for example. Which way did you take the sign the first time you saw it?