Ala. Code § 31-2-84: Right of Troops as to Use of Streets and Highways.

United States Armed Forces or any portion of the National Guard or Naval Militia of Alabama parading or performing any duty, according to law, shall have the preferable right in any street or highway through which they may pass; provided that the carrying of the United States mails, the regular functions of the police and the progress and operation of fire engines and fire departments shall not be interfered with.