Seriously?

I had to take a photo of this street sign as I have never seen this before anywhere.
The sign says: ‘One way’ with an arrow indicating which way, and a pedestrian. The pavement on the opposite side of the road has the same sign pointing the other way.
Now, this is a busy road, but the pavements are not. I cannot believe pedestrians are incapable of avoiding bumping into each other and need to be advised to use different pavements depending on their direction of travel. I’ve never seen this before.