Code of Alabama
Article 1 - General Provisions.
Section 23-1-10 - "Blue Reflective Markers" and "Fire/water Hydrant" Defined; Purpose and Installation of Blue Reflective Markers.

(a) For purposes of this section, the following words and phrases shall have the respective meanings ascribed to them, except where the context clearly indicates otherwise:
(1) BLUE REFLECTIVE MARKERS. Nonlighted, but reflective devices which are blue in color of the reflected light and conform to the most recent edition of the Manual on Uniform Traffic Control Devices for Streets and Highways and/or other standards issued or endorsed by the Director of Transportation and the federal highway administrator.
(2) FIRE/WATER HYDRANT. All standpipe hydrants installed on public and private water delivery systems which are installed along public roads within the state, and which are of a size and style to allow adequate water supply to fill fire suppression vehicles of municipal and/or certified volunteer fire departments or furnish a supply of water to trucks at a fire scene.
(b) Blue reflective markers shall be used exclusively for the purpose of indicating the location of fire/water hydrants which are located on public roadways within the state, or on private property with the owner's permission. Markers which are installed so as to be adhered to paved road surfaces or which are placed anywhere within the highway right-of-way shall be placed in conformance with the most recent edition of the Manual on Uniform Traffic Control Devices for Streets and Highways and/or other standards issued or endorsed by the Director of Transportation and the federal highway administrator.
(c) Blue reflective markers may be installed by any municipality, county, fire district, fire or water authority, or any certified volunteer fire department within their primary coverage areas and shall be recognized by all fire departments and firefighters for the purpose stated.