Really?

After spending most of the past several weeks walking 10+ miles per day, we decided to vary the transportation mix a bit.  We took a cab from Muxia back to Santiago, a bus to Porto, then hopped on a train to Regua in the Douro valley.

While we were walking, we never paid much attention to the road signs meant for the motorists. Why would we? So when we were careening back to Santiago, I kept seeing "yield to cow" signs.

We are talking a major road, speed limit at 100 in spots. Now I understand the "deer crossing" signs (although we haven't seen a single deer the entire time), but yield for cows?

Who knew it was really a thing.