Found this while wandering around the Lemon Heights area a few weeks ago, looking for scenic viewpoints. It’s on the Skyline trail, near Peters Canyon park.
It seems to be saying this:
- Cyclists* yield to pedestrians and horses.
- Pedestrians yield to horses.
- Horses yield to no one.
But if you’ve never seen it before, the meaning isn’t clear at a glance.
Apparently the idea is to make everyone stop and try to work out the diagram, so that they can start moving again in the right order.
*Or perhaps only bicycles, since there’s no rider in the picture.