There’s no good reason why these road signs should be spelled this way, but they’re a Batanes icon. There is, however, a good reason for their existence. The roads of Batanes are so narrow and full of tight turns that it’s necessary to check for traffic in the opposite direction. A driver even told me that it’s safer to drive at night since he can easily see the headlights of approaching vehicles. I don’t think I can agree, specially when you can easily fall off the edge of a cliff in complete darkness.