Earlier quoted context omitted.
>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. I answered that the police and ambulances were obviously breaking the rules, because they are. The difference is that ambulances/police are allowed to break the rules in an emergency - famously, ambulances have a legal ri…
I answered in the same way. I chose to interpret the rule as "no functioning registered terrestrial road vehicles", in which case emergency vehicles are violating the rule.
(driving a tank through the park)