Take a look at this remarkable post by George Staropoli, and the even more remarkable video that he links to, where you hear Arizona legislators actually discussing whether private corporations should be able to enforce their rules on...public roads. The bill in question is SB 1113.
Read this. How does subsection B grab you?
Be it enacted by the Legislature of the State of Arizona:
Section 1. Title 33, chapter 16, article 1, Arizona Revised Statutes, is amended by adding section 33-1817, to read:
33-1817. Community authority over public roadways; exemption
A. Notwithstanding any provision in the community documents, after the period of declarant control, an association has no authority over and shall not regulate any roadway for which the ownership has been dedicated to or is otherwise held by a governmental entity.B. This section does not apply to a planned community located in an unincorporated area of a county.