On: The rule says, “No vehicles in the park”

[smitop]

In a legal context "highway" has a broader meaning than in everyday use. From the link above: highway "includes every road, street, lane or right of way designed or intended for or used by the general public for the passage of vehicles"

[hsjqllzlfkf → smitop]

Ok, looks like that doesn't include a park in which vehicles are forbidden then.