Breakaway mailbox definition

Breakaway mailbox means any mailbox which is designed to bend or fall away when struck by a vehicle, such as a mailbox constructed with a 4-inch by 4-inch wooden gate post or a 2-inch tubular street gate post; or a one-piece plastic mailbox placed upon a steel sleeve 3½ inches in diam- eter; or a mailbox with a similar design as those aforementioned but not constructed of brick and/or blocks.