882.01 General.
b.Reflectors . The refl ectors shall comply with the requirements for delineator type reflectors noted in Subarticle 881.01(b), except the metal housing and metal center grommet will not be required.
c.Backup Plates . The backup plates for the hazard markers shall be at least 0. 064 inch {1.6 mm} thick aluminum sheets. The surface of the marker facing traffic shall be treated with a coating of baked on yellow enamel (Highway yellow). Attachment of the reflectors to the backup plate and of the backup plate to the post or mounting s urface shall be in accordance with the details shown on the plans or an approved substitute.
d.Posts . Posts used for mounting hazard markers shall be in accordance with the details shown on the plans and the requirements of Subarticle 881.01(c).
e.Moun ting. Mountings other than on posts shall be in accordance with plan details.
f.Sampling and Testing . Sampling and Testing of the reflector units shall be as prescribed in Subarticle 881.02(b).
g.Standard or Special Sign Panels . The panel shall comply with the requirements of Section 880 for signs with the legend or marking as required by plan details. Sign panels shall be sampled and tested as prescribed in Section 880. PAVEMENT MARKERS
882.01 General.
a.Sampling Procedure and Test Re quirements .
1.Permanent Markers . The Department has established LIST V -2, PERMANENT PAVEMENT MARKERS, TEMPORARY PAVEMENT MARKERS, MARKER ADHESIVE, DELINEATORS AND HAZARD MARKERS, of the Department's manual, "Materials, Sources, and Devices With Special Ac ceptance Requirements", for permanent pavement markers. Only markers on this list shall be furnished for use. Refer to Subarticle 106.01(f) and ALDOT -355 concerning this list.
2.Temporary Markers . All markers on LIST V -2 may be used as temporary markers. Only markers on this list shall be furnished for use. Refer to Subarticle 106.01(f) and ALDOT- 355 concerning these lists.
b.Packaging . The markers shall be supplied in suitable containers which will protect the units from damage during shipment and storage. Containers shall be legibly marked with the name and type, etc. of the contents.
882.02 Reflective Markers.
a.Class "A" Marker . Class "A" pavement markers shall meet the requirements of ASTM D 4280 with Surface Characteristics: No Designation - Marker with plastic lens surface.
b.Class "A-H" Marker . Class "A -H" pavement markers shall meet the requirements of ASTM D 4280 with Surface Characteristics: Designated "H" - Marker with hard, abrasion -resistant lens surface.
882.03 Non -Reflective Mark ers.
a.General . Class B pavement markers shall be formed of heat fixed ceramic base material constructed in such a manner as to form a solid, watertight unit. The markers shall be of the general size and shape shown on the plans with smooth rounded corne rs. Any change in the curvature shall be gradual. The top and
889.01 General.
sides of the marker shall be smooth and free from mold marks, pits, indentations, air bubbles, or other objectionable marks or discolorations. The base of the marker shall be flat (deviation fro m a flat surface shall not exceed 0.05 inch {1.27 mm}) rough textures (comparable to at least that of a fine grade sand paper) and free from gloss or substances which may reduce the markers bond to the adhesive.
b.Materials . Ceramic - Heat fired, vitreou s, ceramic base and a heat fired, opaque, glazed top surface. The bottom surface shall be unglazed, suitable for cementing to the road surface. The marker may be produced from any suitable combination of intimately mixed clays, shales, talcs, or other inor ganic material. The marker shall be thoroughly and evenly matured and free from defects which will affect the appearance and serviceability.
c.Tests .
1.Color. White - Brightness relative to Magnesium Oxide - 80% Minimum. Yellow - Brightness relative to Magnesium Oxide - 40% Minimum and match the standard shade within the red and green balances when compared with Color Chip 33538 of Federal Standard No. 595.
2.Water absorption - 2% Max. (ASTM C 373)
3.Hardness - Moh Hardness - 6 Min.
4.Autoclave Test - shall not craze, spall, or peel when subjected to one cycle at 250 psi {1724 kPa} - ASTM C 424.
5.Glaze Thickness – 0.005 inch {0.13 mm} Min.
6.Strength - Markers shall be capable of supporting a load of 1500 pounds {680 kg} applied as follows: A marker shall be centered over the open end of a vertically positioned hollow metal cylinder. The cylinder shall be at least 1 inch {25 mm} high, with an internal diameter of approximately 3 inches {75 mm}, and with a minimum thickness of 1/4 inch {6 mm}. Loading shall be slowly applied to the top of the marker through a 1 inch {25 mm} diameter by 1 inch {25 mm} high metal plug centered on the top of the marker. An average compressive strength of three markers shall be obtained; however, any individual marker whic h fails under a compressive load of less than 1200 pounds {500 kg} shall be cause for rejection of the marker lot being tested.
7.Adhesive Bond Strength - The adhesive tensile bond strength to the bottom of the marker accepted for use on the project and the epoxy adhesive accepted for use on the project shall be not less than 1500 psi {10 MPa}.
882.04 Adhesives For Pavement Markers.
Bituminous adhesive used to affix permanent pavement markers to the pavement shall be one of those listed in List V -2 of the Department's manual "Materials, Sources, and Devices with Special Acceptance Requirements." The adhesive used to affix the temporary markers to the pavement shall be any suitable type of adhesive for the intended purpose, except that in those lo cations where the markers will be required to be removed, the adhesive shall be a type that will allow for the complete removal of the marker without scarring or disfiguring the pavement. SECTION 889 ROADWAY LIGHTING MATERIALS
889.01 General.
Electrical materials shall conform to the requirements given in the current edition of the NFPA 70, "National Electrical Code" (NEC). Electrical materials shall also conform to the standards of the American National Stand ards Institute (ANSI), the National Electrical Manufacturers Association (NEMA), and the Underwriters Laboratories, Inc. (UL), in every case where a standard has been established. All materials shall be "listed" by one or more of these organizations. The m ark of the listing organization shall appear on electrical material and equipment.
Source: Alabama Standard Specifications for Highway Construction, 2022 Edition. Pages 819–819 of 934.