Japan puts these uturn fences up. The sign near the uturn part says "get off your bike and walk it"

https://pasteboard.co/IlXSlFUOgULW.png

I'm not sure how I feel about them. I like that the made a way to get you off your bike. I dislike that the path seems plenty wide enough to accomodate bikes and that it would be a useful bike path or 1/2 bike path, but they want it to 100% pedestrian path, even though it's not remotely crowded.