> Yes, you can academically wonder whether an orbiting space station is a vehicle and whether it's in the park, but the obvious intent of the sign couldn't be clearer. Cars/trucks/motorcycles aren't allowed, and obviously police and ambulances (and fire trucks) doing their jobs don't have to follow the sign.
Now you're assuming the intent.
The park could contain loose soil on the edge of a cliff, so any vehicle driving there could cause a landslide that topples the vehicle over the cliff and could kill anyone on the beach below. No vehicles in the park.
But the larger point is that people can adopt the "obvious intent" version of the rule when it suits them and the pedantic version of the rule when it suits them. If you're the park ranger and the local police come into the park in their car chasing after some criminals, and the local police are your buddies, you say they haven't violated the rule because the intent isn't to apply to emergency vehicles. If the exact same thing happens but you're having a dispute with the local police, now they're violating the rule and you can come up with something like the park isn't in their jurisdiction.
It's the same rule. It's the same action. The only difference is if you like them or not. And that's the problem.
Now you're assuming the intent.
The park could contain loose soil on the edge of a cliff, so any vehicle driving there could cause a landslide that topples the vehicle over the cliff and could kill anyone on the beach below. No vehicles in the park.
But the larger point is that people can adopt the "obvious intent" version of the rule when it suits them and the pedantic version of the rule when it suits them. If you're the park ranger and the local police come into the park in their car chasing after some criminals, and the local police are your buddies, you say they haven't violated the rule because the intent isn't to apply to emergency vehicles. If the exact same thing happens but you're having a dispute with the local police, now they're violating the rule and you can come up with something like the park isn't in their jurisdiction.
It's the same rule. It's the same action. The only difference is if you like them or not. And that's the problem.