It is the policy of the department to construct and furnish, free of charge, mailbox supports for all rural postal patrons located on state maintained highways.

This is to ensure the most recent crash testing standards for compliant mailbox configurations, Manual for Assessing Safety Hardware, are installed.

The postal patron should provide a standard mailbox of light sheet metal or plastic construction that conforms to the requirements of the U.S. Postal Service. Additional information is available on the department’s .

Rubbermaid and Step 2 brand molded plastic mailboxes may be mounted with lag bolts on a 4" x 4" wooden support post furnished by the postal patron. These types of mailboxes conform to USPS standards.