Based on what the sign says:
- Bikes Must Dismount:
bicycle=dismount
- Walk Your Bike:
bicycle=dismount
- Bicycle Riding Prohibited:
bicycle=dismount
- No Bikes:
bicycle=no (even if you can secretly get away with walking your bike)
Maybe I might go back and retag this sidewalk with *=dismount on the basis that the sign only literally bans activities rather than devices. And of course one would take off one’s rollerskates rather than “dismounting” from them. But also, who cares?
I don’t know of that many roads or paths that would ever need to clarify “No Horse Riding” as opposed to “No Horses on Foot”. Maybe in a park where a bridle path comes close to a playground? As I pointed out earlier, when “No Animals” appears on a road sign, it really means “No Animals on Foot”. It isn’t the case that Kentucky allows horse trailers on freeways while Ohio does not, or that New York bans the transportation of fluffy cats and dogs as hazardous material.
To reiterate, I only provided this example as a joke. The real purpose of the sign is to tell bus operators not to idle their engines when parking on the side the street during a layover (parking:restriction=no_idling). By coincidence, it appears with a speed limit sign that applies to all moving vehicles, as though it’s an instruction to cut the engine and coast.