713.01 713-1 SECTION 713 TRAFFIC CONTROL MATERIALS
713.01 Signs – General. Aluminum or steel used for traffic control shall conform to Table 713 -
1. Table 713 -1 REQUIREMENTS FOR ALUMINUM OR STEEL USED IN TRAFFIC CONTROL Application Aluminum ASTM Designation Aluminum Alloy No. Temper Steel ASTM Designation Sign panels B209 B449* B921* 6061-T6 5052- H36 5052-H38 A653# Traffic controller cabinets B209 6061- T6 A709 Grade 36 Clip bolts B211 2024-T4 Locknuts or steel nuts and bolts B211 2014-T4 A307 Clips and backing angles B221 6061- T6 Table 713 -1 Notes: *In lieu of ASTM treatment, aluminum sign blanks shall receive a Class 2 anodized coating before the placement of retroreflective sheeting. # Steel sheets shall have a Z600 zinc coating per ASTM A653 and a light phosphate coating. Phosphate coating of 3.5 oz./sq. ft. will be required for application with reflective sheeting. Nuts and bolts shall be galvanized, or cadmium plated.
713.02 Aluminum Sign Panel Tolerances. Aluminum sign panel sheet dimensional tolerances
shall conform to the applicable requirements of the American National Standards Institute Dimensional Tolerances for Aluminum Products, ANSI -H35.2(M), with the following exceptions: The flatness tolerances shall be one -half the values listed in Table 3.12 and shall apply to all aluminum alloy grades permitted for sign panels. Sign blanks are to be tensile leveled for sheet thickness less than 0.09 inch, and stretcher leveled for thickness equal to or greater than 0.09 inch. The individual sign blank bow tolerance (deviation of a side edge from a straight line) shall not exceed 1/3 inch, and the dimensions of the opposing sides shall be within 1/16 inch. Aluminum sign panel shall be subject to the requirements of the first paragraph of subsection 713.09.
713.03 (unused)
713.04 713-2 713.04 Sign Message Materials. The legend, border, and overlay shall be used per the sheeting manufacturer’s recommendation. Retroreflective sheeting background material shall be on the Department’s Approved Product List; and the retroreflective sheeting background material shall be the type specified on the plans. At a minimum, ASTM D 4956 Type IV shall be used for ground mount signs. ASTM D4956 Type XI shall be used for Class III overhead signs. For Class III overhead signs, the legend and borders shall be ASTM D4956 Type XI sheeting. All reflective sheeting shall be sealed at the seams and edges as recommended by the manufacturer.
713.05 Hardware. All hardware shall be compatible with sign material and shall not cause
discoloration due to weather.
713.06 Flexible Delineators
a.Physical Properties
1.Material. The post shall be manufactured from an impact resistant flexible material, and resistant to the following: U.V. exposure, cold weather temperatures, temperature fluctuation, and de- icing materials. The post shall be permanently sealed at the top and shall be date -stamped showing the month and year of fabrication. The date- stamp shall be on top of the post on the side facing away from traffic. The numerals shall be at least 1/4 inch in height and shall be die- stamped or legibly stamped with permanent ink.
2.Color. The post shall be Interstate Green in accordance with AMS -STD-595, Color Number 14109, unless otherwise specified. The post shall show no signs of delamination, distress, or discoloration.
3.Dimensions.
A.Length. The post shall provide a height of 48 inches above the edge of pavement and provide the required anchoring depth for Drivable Method of installation. The post length shall conform to requirements outlined in S -612-01 for all other methods of instal lation.
B.Width. The post shall have a minimum width of 2 3/8 inches and a maximum width of 4 1/8 inches facing traffic.
b.Base Anchoring. The post shall be designed to facilitate a permanent installation resistant to overturning, twisting, and displacement from wind and impact forces. A metal anchor base shall be installed per CDOT Standard Plan S -612-01 or manufacturer’s recommendation. A concrete foundation shall be used for delineator support in soft soils per the plans or as directed by the Engineer. The base anchor shall be capable of being driven into an earth shoulder with or without a pilot hole. Installation shall be accomplished with typical maintenance equipment.
c.Reflective Elements. Posts shall be shaped to accommodate the installation of reflective elements. Each reflective element shall be a 3 x 3 inch squared, Type IV or Type V reflective sheeting material meeting the requirements of subsection 713.10. A Type I delineator shall have one (3 x 3 inch) reflective element on one side, a Type II delineator shall have two (3 x 3 inch) reflective elements on one side, and a Type III delineator shall have three (3 x 3 inch) reflective elements on one side. 713.07 713-3 Reflective elements shall be placed in a straight vertical column starting one inch from the top edge of the delineator. Type II and III delineators shall have reflective elements separated by one inch vertically in the column. All reflective elements shall be placed at the factory by the manufacturer prior to on -site delivery of delineators. The texture of the projected surface shall be smooth and suitable for the adherence of reflective elements without preparation other than w iping with a clean cloth damped with mineral spirits to remove oil- type contaminants. Reflective elements shall be protected from scratches, abrasions, and other physical damage during shipping and base anchor driving by an easily removable “masking” sheet.
d.Workmanship. The posts shall exhibit good workmanship and shall be free of burrs, discoloration, contamination, and other objectionable marks or defects which affect appearance or serviceability. Each post shall be visibly free of bends or twists, prior to and after installation.
e.Performance Requirements. Posts shall be tested in accordance with NTPEP's Evaluation of Temporary Traffic Control Devices: Flexible Delineators. Posts shall be designed such that an installed post is capable of self -erecting and remain serviceable after b eing subjected to a series of direct impacts by a typical passenger sedan. Posts installed in ground mount, side of roadway configurations shall be capable of withstanding a series of ten impacts into the traffic face of the post at a speed of 55 mph. Post s installed in surface mount, head -on and/or channelizing configurations shall be capable of withstanding a series of 125 impacts into the traffic face of the post at a speed of 55 mph. CDOT reserves the right to require additional testing to best meet the performance of Colorado’s environment.
f.Sampling and Acceptance. Prior to shipment of posts, the manufacturer shall submit a MASH self-certification letter to the Project Engineer.
713.07 Reflectors. Reflectors shall consist of a clear and transparent acrylic plastic prismatic
reflex lens with a smooth front face, except for the legibly molded manufacturer's trademark, and a back hermetically sealed surface with prismatic configuration effecting total internal reflection of light. Firmly fused to the back surface shall be a back ing material. The backing material shall be white opaque plastic of the same type as the lens and delineator reflectors may be backed with a plastic -coated metallic foil. Delineator reflectors shall be housed in embossed aluminum and provided with a single grommeted mounting hole. The delineator unit shall withstand the combined corrosi on test described in ASTM B 117.
713.08 Glass Beads for Traffic Markings. Glass beads for pavement marking shall conform to
AASHTO M 247, except for the following:
1.Gradation: 713.09 713-4 Table 713 -2 GRADATION OF GLASS BEADS
U.S, Mesh Microns Modified Epoxy and Methyl Methacrylate % Passing Acrylic Waterborne: Low Temperature and High Build % Passing 16 1180 90-100 100 18 1000 65-80 97-100 20 850 85-100 30 600 30-50 50-70 40 425 10-35 50 300 0-5 0-10 80 180 0-5
2.Roundness: All beads shall meet a minimum of 80 percent true spheres per the Office of Federal Lands Highways FLH T520 or a computerized optical testing method.
3.Color / Clarity: Beads shall be colorless, clear, and free of carbon residues.
4.Refractive Index: Minimum 1.51 by oil immersion method.
5.Air Inclusions: Less than 5 percent by visual count.
6.Coatings: According to the manufacturer’s recommendation for optimum adhesion and embedment.
7.Chemical Resistance: Beads shall be resistant to hydrochloric acid, water, calcium chloride, and sodium sulfide as tested using the methods outlined in sections 4.3.6 to 4.3.9 of the TT -B Federal Spec.1325D.
8.For modified epoxy pavement marking, a minimum of 50 percent of the total weight shall be manufactured using a molten kiln direct melt method. For acrylic waterborne paint, a minimum of 15 percent of the total weight shall be manufactured using a molten kiln direct melt method. All molten kiln direct melt glass beads shall be above the 600 µm (#30) sieve.
9.Glass beads used for any type of pavement marking shall not contain more than 75 parts per million (ppm) arsenic, 75 ppm antimony and 100 ppm lead, as tested per EPA methods 3052 and 6010C, or other approved testing method. Glass beads shall be furnished in fully identified containers and shall be free of extraneous material or clumps. Glass beads for thermoplastic pavement marking shall conform to AASHTO M 247, Type 1.
713.09 Sampling and Inspection. The E ngineer shall be notified well in advance of
beginning of shop work so that adequate arrangements may be made for sampling and inspection. Shop inspection may be waived, and complete inspection made when the fabricated sign panels are delivered to the site of the work. The following samples shall be submitted to the Engineer for approval: 713.10 713-5 (1) A 12-inch x12-inch sample of finished material for figure frames.
2.A 12-inch x12-inch sample of reflective sheeting representing each lot used on the project.
3.Two reflectors for each 100, or part thereof, of each size and color , with a limit of 53 samples for any one size or color. When reflective buttons are so affixed to the cutout frames that their removal for testing will cause breakage, it shall be the res ponsibility of the sign fabricator to furnish a representative sample of reflective buttons.
4.2 pounds of glass beads, representing each lot used on the project.
5.1 pint of paint of each color, representing each lot used on the project.
6.1 pound of thermoplastic marking material and one liter of each primer component.
7.36-inch strip of preformed plastic pavement marking.
8.36-inch strip of pavement marking tape.
9.1 square foot of preformed thermoplastic pavement marking material.
713.10 Quality Requirements of Reflective Materials . Reflective devices and reflective
sheeting shall be materials that are on the Department 's Approved Products List.
a.Reflective Devices .
1.Reflective Quality Requirements.
A.Delineator and Median Barrier Reflectors. The specific intensity of each delineator and median barrier reflector shall be at least equal to the following minimum values when tes ted per AASHTO T 257, with an observation angle of 0.1 degrees. TABLE 713 -3 QUALITY REQUIREMENTS OF DELINEATOR AND MEDIAN BARRIER REFLECTORS Specific Intensity Candlepower per Foot -Candle Entrance Angle Degrees Crystal Yellow Blue Red Green 0 115 70 48 25 62 20 45 25 26 10 34
B.Cut-out Figure Reflectors. The specific brightness of crystal reflectors used in cut -out figures shall be at least equal to the following minimum values. Table 713 -4 QUALITY REQUIREMENTS OF CUT- OUT FIGURE REFLECTORS Observation Angle Degrees Entrance Angle Degrees Specific Brightness: Candlepower per Sq In per Foot -Candle 0.1 0 14.0 0.1 20 5.6 713.11 713-6
2.Material and Component Requirements. Plastic for delineator and cutout figure reflectors shall be poly methyl methacrylate conforming to requirements of ASTM D 788, Grade 8. The reflectors shall meet test requirements of CP L -2115, Sec tion 3.2 and 3.3.
b.Retroreflective Sheeting. Reflective sheeting for traffic control devices shall be listed on the CDOT Approved Products List and conform to th e requirements of ASTM D 4956.
1.Retroreflective Quality Requirements. Drums and Tubular Markers. Retroreflective sheeting shall conform to ASTM D4956 Type IV, with the following modifications: The Minimum Coefficient of Retroreflection (RA) shall conform to the following minimum values. Table 713 -5 MINIMUM COEFFICIENT OF RETROREFLECTION (RA) Minimum Coefficient of Retroreflection (R A) [cd/fc/ft2 (cd/lx.m2)] Observation Angle Entrance Angle White Fluorescent Orange 0.2o -4o 500 200 0.2o 30o 200 80 0.5o -4o 225 90 0.5o 30o 85 34
2.Daytime Color. Drums and Tubular Markers. All fluorescent orange sheeting shall meet the color requirements of ASTM D4956, with the following modifications: The chromaticity coordinates and total luminance factor shall conform to the requirements as described in 23 CFR Part 655 Appendix to Subpart F . The Fluorescence Luminance Factor (YF) shall conform to the following minimum values. Table 713 -6 MINIMUM FLUORESCENCE LUMINANCE FACTOR (YF) Color YF Initial Requirement YF Minimum Requirement Fluorescent Orange 20 15
713.11 Traffic Signals. Electrical conduit , pull boxes and junction boxes shall conform to
the requirements of Section 613 and subsection 715.06, and to the details shown on the plans. 713.11 713-7 Conductors shall be nineteen strand or seven stranded, tinned copper wire, rated at 600 volts and individually insulated with heat -stabilized polyethylene. Conductors and cables shall be copper and conform to Specification 19 -1 of the International Municipal Signal Association (IMSA). Direct -burial cable shall be copper and conform to Specification 19 -5 of the IMSA except that conductors x shall be seven, wire, stranded. Pull rope shall be 1/8- inch nylon. Messenger cable (span wire) shall be 3/8- inch diameter (minimum), seven wire stranded, common galvanized, utilities grade, rated at 11,500 po unds, per ASTM A 475. Grounding and bonding wires, straps and electrodes shall be copper and conform to NEC Article 250. Adjustable face vehicle traffic control signal heads and associated equipment shall conform to the general specifications and definitions contained in the latest issue of Technical Report No. 1, prepared by the ITE, and as shown on the plans. Adjustable face pedestrian signal heads and associated equipment shall conform to the general specifications and definitions contained in the latest issue of Technical Report N o. 5, prepared by the Institute of Traffic Engineers, and as shown on the plans. Traffic signal lamps shall conform to the general specifications and definitions contained in the latest issue of Technical Report N o. 6, prepared by the Institute of Traffic Engineers. Lamps shall be rated for operation at 120 volts AC. Lamp wattages shall be 60 -69 Watts for all 8- inch traffic signals, 150 Watts for all 12 -inch traffic signals, 116 Watts for all 16 -inch pedestrian signals, or as otherwise specified by the manufacturer. LED Traffic Signal Section optical units shall meet or exceed ITE Adjustable Face Vehicular Traffic Control and Pedestrian Signal Head Standards. In addition to this, LED optical units shall conform to the following requirements:
1.Wattage Table 713 -7 WATTAGE FOR TRAFFIC CONTROL SIGNAL HEADS Max. 35 watts, ±5 watts for 12 -inch ball Max. 30 watts, ±5 watts for 8- inch ball Max. 15 watts, ±5 watts for 12- inch arrow Max. 15 watts, ±5 watts for PED hand symbol Maximum total harmonic current distortion (THD) shall be < 20 percent. Power factor shall be > 90 percent. Load balance requirement: load in one phase shall not exceed the load in any other phase by 15 percent. Note: THD and power factor requirements shall be waived for products designed to operate at less than 14 watts. 713.11 713-8 (2) Voltage Operating shall be between 85 and 130 VAC. Electronic circuitry shall ensure proper operation of the load switch and monitor in the control cabinet.
3.Circuit Configuration The LEDs shall be connected to form multiple series circuits. All series circuits shall be interconnected at intervals, forming subcircuits not exceeding 15 LEDs for the ball and arrow signals, and 10 LEDS for the pedestrian hand symbol. In the event of an LED failure, these subcircuits shall limit the number of extinguished LEDs to no more than 4 percent of the total on the ball and pedestrian hand signal lamps, and 6 percent of the total on the arrow lamp.
4.Enclosure Shall be dust and water resistant.
5.Operating Temperature Between minus 40 °F and plus 165 °F
6.Lens Shall be replaceable, polycarbonate (UV stabilized "Lexan") convex lens; meet ITE color standards; minimum of 1/8 inch thickness; and minimum light transmittance of 92 percent, free from bubbles, flaws and other imperfections. Non -polycarbonate tinted lenses will be accepted if they meet ITE color standards. Chromacity shall be measured uniform across the face of the lens. Non -polycar bonate lenses shall also meet 3 1/2 -foot drop tests. The outside face of the lens shall be smooth. Grooves, ridges, or both that may be used to enhance optical characteristics of the LED optical unit shall be located on the inside face of the lens.
7.Candlepower Distribution Shall meet minimum ITE specifications. Intensity shall be measured uniform across the face of the lens. Brightness shall be maintained in the event of voltage fluctuations or voltage drops.
8.Beam Spread 30 degrees both horizontally and vertically.
9.Manufacturer’s Warranty Repair or replacement guarantee of five years covering all but accidental damage. Foundations for poles, pedestals, posts, and cabinets shall conform to the requirements of Section 601. Bonding and grounding jumpers shall be copper wire or copper strap of the same cross - sectional area; the wire size shall be No. 6 AWG for all systems except the ground terminal of controllers, which shall be No. 8 AWG. All exterior parts of the signal heads requiring paint shall be painted Federal Yellow 595B No. 13538 unless otherwise specified. Traffic signal faces, which are rigidly supported on the top and bottom, may be of an approved polycarbonate type unless otherwise shown on the plans. 713.12 713-9 713.12 Thermoplastic Marking Material. Thermoplastic marking material shall conform to AASHTO M 249 except for the following:
1.In paragraph 3.1.2 of the AASHTO specifications, delete the first two sentences and replace with the following: The material manufacturer shall have the option of formulating the material according to its own specifications. However, the binder shall be composed of alkyd resins wherein a minimum of 70 percent (by weight) of the binder shall be maleic modified glycer ol ester of rosin. The physical and chemical properties contained in this specification shall apply regardless of the type of formulation used.
2.In paragraph 4.3 of the AASHTO specifications, add the following physical characteristics: The infra-red spectra of the extracted binder will be compared to the characteristic absorption bands of maleic modified glycerol ester of rosin.
3.In paragraph 6.1 of the AASHTO specifications, delete the second sentence and replace with the following: The containers of thermoplastic material shall weigh approximately 50 pounds.
713.13 Preformed Plastic Material. Preformed plastic pavement marking material shall
conform to ASTM D4505 for one of the following requirements:
1.Class 1 tape will not be permitted.
2.Class 2: for lane lines, crosswalks, stop lines and edge lines.
3.Class 3: for legends and symbols. Preformed plastic pavement marking color shall conform to the requirements of ASTM D6628. Preformed plastic pavement markings shall meet the dimensional requirements of ASTM D4505. Skid resistance will not be considered a factor for acceptance. The edges of the preformed plastic pavement marking shall be straight and uniform, and consistently adhere to the pavement. Unless otherwise stated in the Contract, preformed plastic pavement marking shall conform to the following material requirements for the Type shown on the plans: 713.14 713-10 Table 713-8 PREFORMED PLASTIC PAVEMENT MARKING Property Type I Type II * Type III Minimum thickness (mils) 75 75 60 Minimum Width (in) 4 7 4 Initial Retroreflectivity Retroreflectivity level I per ASTM D4505 Retroreflectivity level I per ASTM D4505 Retroreflectivity level II per ASTM D4505 Adhesion (ºF) # Roadway surface temperature range of 50 ºF - 115 ºF per ASTM Test Method 1000 Roadway surface temperature range of 50 ºF - 115 ºF per ASTM Test Method 1000 Roadway surface temperature range of 50 ºF - 115 ºF per ASTM Test Method 1000 Beads Ceramic or combination of glass and ceramic Ceramic or combination of glass and ceramic Glass Minimum refractive index 1.7 1.7 1.5 Surface pattern Minimum of 31 mils and per ASTM D4505 Minimum of 31 mils and per ASTM D4505 N/A Table 713 -8 Notes: * Contrast pavement marking to be used for skip lines, lane lines and gore markings. #The adhesion temperature is identical to both the application and test temperatures. Application at a lower temperature may be permitted as approved by the Engineer .
713.14 Preformed Thermoplastic Material.
a.General . Preformed thermoplastic markings shall be composed of aggregates, pigments, binders and glass beads, and shall conform to AASHTO designation M 249 with the exception of the relevant differences due to the fact that the material is supplied in a preformed state. The material shall be either alkyd or hydrocarb on based. Only preformed thermoplastic pavement marking material listed on the Department 's approved products list may be used.
b.Physical Requirements.
1.Graded Glass Beads. The material shall contain a minimum of 30 percent graded glass beads by weight. The beads shall be clear and transparent. Twenty percent or less shall consist of irregular, fused spheroids, or silica. The refractive index shall be at least 1.50.
2.Pigments. White - Sufficient titanium dioxide pigment shall be used to ensure a color similar to Federal Highway White, Color N o. 17886, conforming to Federal Standard 595. Yellow - Sufficient yellow pigment shall be used to ensure a color similar to Federal Highway Yellow, Color N o. 13655, conforming to Federal Standard 595. The yellow pigment shall be organic and contain no lead chromate.
3.Skid Resistance. The surface of the preformed thermoplastic markings shall provide a minimum resistance value of 45 BPN when tested according to ASTM E303.
4.Thickness. The material shall be supplied at a minimum thickness of 125 mils. 713.15 713-11 5. Environmental Resistance. The preformed thermoplastic material shall be resistant to deterioration due to exposure to sunlight, water, oil, gasoline, salt and adverse weather conditions.
713.15 Pavement Marking Tape.
a.Description . The marking tape shall consist of weather and traffic resistant yellow or white colored reflective material. The material shall consist of conformable (metal foil) backing with a pressure sensitive adhesive designed for adhesion to asphalt or concrete surfaces.
b.Requirements.
1.Color. The color of the visible or outer surface shall closely match the white or yellow traffic marking paint specified for highway delineation. Glass beads shall be strongly adhered to the tape.
2.Reflectance. The white and yellow tapes shall have the following initial minimum reflectance values at 0.20° and 0.50° observation angles and 86.00° entrance angle as measured per the testing procedures of Federal Test Method Standard 370. The photometric quantity measured is specific luminance (SL ) and is expressed as millicandelas per square meter per lux. TABLE 713 -9 SPECIFIC LUMINANCE (SL) Observation Angle White 0.2° White 0.5° Yellow 0.2° Yellow 0.5° Specific Luminance 1360 760 820 510
3.Adhesive. The striping tape shall be supplied in rolls ready for application and have a precoated pressure sensitive adhesive, which shall not have a protective liner or require a solvent activator.
4.Adhesion. The material shall adhere to asphalt and concrete surfaces when applied at surface temperatures of 35 °F and above. Once applied , the tape shall adhere to the pavement at subfreezing temperatures.
5.Conformability. The material shall be thin, flexible, conformable, and show no cracking, flaking, or bead loss. Following application, the tape shall remain conformed to the texture of the pavement surface. The thickness of the material shall not be less than 17 mils.
6.Removability. The tape shall be removable by following manufacturers' recommendations so long as the material is substantially intact. Removal shall not require sandblast, solvents, or grinding methods.
7.Durability. The striping material applied per manufacturers' recommended procedures shall be weather resistant and show no appreciable fading, lifting, or shrinkage during the useful life of the line.
8.Packaging and Delivery. The striping material as supplied shall be of good appearance and free from cracks. The edges shall be true, straight, and unbroken. The material shall be supplied in rolls with no more than one splice per 50 yards of length. 713.16 713-12 The striping material shall be packaged per accepted commercial standards to prevent damage during shipment and storage. The tape as supplied shall be suitable for use for a period of at least one year following delivery when stored at temperatures of 100 °F or below.
713.16 Pavement Marking Tape (Removable). Pavement marking tape designated in the
pay item as removable shall conform to ASTM D 4592, Type I, and shall be four plus or minus 0.1 inches wide.
713.17 Modified Epoxy Pavement Marking Material. Only modified epoxy pavement
marking material that is on the Department 's Approved Products List may be used. Batches or lots of approved products will be accepted on the project by Certificate of Compliance (COC) per subsection 106.12. The COC shall confirm that the material meets all CDOT requirements and is the same material that was preapproved in the product evaluation process.
a.Formulation . Modified epoxy pavement marking material shall be a two component, 100 percent solids, material formulated to provide simple volumetric mixing ratio of two volumes of component A and one volume of component B unless otherwise recommended by the material manufacturer.
b.Composition . The component A of both white and yellow shall be within the following limits: Table 713- 10 RESIN / PIGMENT COMPONENTS (% BY WEIGHT) Pigment WHITE YELLOW TiO2, ASTM D476, Type II 18-25 10-17 Organic Yellow 6-10 Epoxy Resin 75-82 73-84 The pigment for yellow modified epoxy shall contain no lead or other material such that the cured epoxy could be considered a hazardous waste under EPA or CDPHE regulations. The Contractor shall submit to the Engineer a manufacturer's certification of compliance with this requirement.
c.Epoxide Number. The epoxide number of the modified epoxy’s resin shall be the manufacturer’s target val ue plus or minus 50 as determined by ASTM D 1652 for white and yellow component A on pigment free basis.
d.Amine Number. The amine number on the curing agent (component B) shall be the manufacturers target value plus or minus 50 per ASTM D2071.
e.Toxicity. Upon heating to application temperature, the material shall not produce fumes that are toxic or injurious to persons or property.
f.Color. The modified epoxy material, without drop -on beads, shall correspond following requirements: White – Federal Standard No. 595B -17925. The Yellowness Index (YI) of white shall not exceed 8.0 per ASTM E313- 10 initially. 713.17 713-13 After 72 QUV exposure per ASTM G154 with a UVA -340 Lamp at an irradiance of 0.89 W/m2/nm with alternating cycles of 4 hours U.V @ 140 ºF , and 4 hours’ humidity @ 122 ºF the YI shall not exceed 15 when measured per ASTM E313. The YI, after 500 -hour QUV testing as above, shall not exceed 27. Yellow – Materials for pavement markings shall meet the initial daytime chromaticity that fall within the box created by the following corner points: Table 713-11 INITIAL DAYTIME CHROMATICITY COORDINATES (CORNER POINTS) 1 2 3 4 x 0.530 0.510 0.455 0.472 y 0.456 0.485 0.444 0.400 After 72 -hour QUV exposure per ASTM G154 with a UVA -340 Lamp at an irradiance of 0.89 W/m2/nm with alternating cycles of 4 hours U.V @ 140 ºF , and 4 hours’ humidity @ 122 ºF the Yellow shall fall within the initial chromaticity coordinates stated above.
g.Drying Time. The modified epoxy pavement marking material shall have a setting time to a no-tracking condition of not more than 25 minutes at a temperature of 73 °F and above.
h.Curing. The modified epoxy material shall be capable of fully curing under the constant surface temperature condition of 35 °F and above.
i.Adhesion to Concrete. The catalyzed modified epoxy pavement marking material, when tested according to ACI Method 503, shall have such a high degree of adhesion to the specified (4 ,000 psi minimum) concrete surface that there shall be a 100 percent concrete failure in the performance of this test.
j.Hardness. The modified epoxy pavement marking materials, when tested according to ASTM D2240, shall have a minimum Shore D Hardness value of 80. Samples shall be allowed to cure at room temperature, 75 plus or minus 2 °F , for a minimum of 72 hours and a maximum of 168 hours before performing the indicated test.
k.Abrasion Resistance. The abrasion resistance shall be evaluated on a Taber Abrader with a 1,000-gram load and CS -17 wheels. The duration of the test shall be 1 ,000 cycles. The wear index shall be calculated based on ASTM test method C -501 and the wear index for the catalyzed material shall not be more than 60. The tests shall be run on cured samples of material that have been applied at film thickness of 15 plus or minus 1/2 mils to code S -16 stainless- steel plates . The samples shall be allowed to cure at 75 plus or minus 2 °F for a minimum of 72 hours before performing the indicated tests.
l.Tensile Strength. When tested according to ASTM D638, the modified epoxy pavement marking materials shall have a tensile strength of at least 6 ,000 psi. The Type IV Specimens shall be cast in a suitable mold and pulled at the rate of 1/4 inch per minute by a suitable dynamic testing machine. The samples shall be allowed to cure at room temperature, 75 plus or minus 2 °F , for a minimum of 72 hours and a maximum of 168 hours before performing the indicated tests. 713.18 713-14 (m) Compressive Strength. When tested according to ASTM D695, the catalyzed modified epoxy pavement marking materials shall have a compressive strength of at least 12,000 psi. The cast sample shall be conditioned at room temperature, 75 plus or minus 2 °F , for a minimum of 72 hours and a maximum of 168 hours before performing the tests. The rate of compression of these samples shall be no more than 1/4 inch per minute.
713.18 Raised Pavement Marker. Raised pavement marker shall not be less than 3.5 inches
or more than 4.5 inches in the major dimension and not more than 0.75 inch in height. The marker shall contain a retroreflective element at least 0.38 square inch in area. The color of the marker and the retroreflective element shall match the color of the pavement mar king line. The reflective quality requirements shall be at least equal to the following minimum values: Table 713 -12 RAISED PAVEMENT MARKER REFLECTIVE QUALITY REQUIREMENTS Observation Angle Degrees Entrance Angle Degrees White Specific Intensity Candela per Lux Yellow Specific Intensity Candela per Lux 0.1 0 0.09 0.06 0.1 20 0.04 0.02 The marker shall be ceramic or plastic and shall be secured to old or new pavement using an adhesive approved by the marker manufacturer.
713.19 Methyl Methacrylate Pavement Marking. The Methyl Methacrylate material shall be
preapproved by the Department . 714.01 714-1 SECTION 714 PRESTRESSED UNIT MATERIALS
714.01 Prestressing Steel. Prestr essing reinforcement shall be manufactured from high tensile
strength steel or alloyed steel. Reinforcement size and grade shall be designated in the Contract. Prestressing steel materials shall meet the appropriate following requirements:
1.Seven wire steel strand shall meet the requirements of AASHTO M 203. All furnished strand shall be "weldless" per AASHTO M 203, subsection 8.1.4. The Contractor shall furnish one test specimen per coil. Each test specimen shall be 5 to 6 feet long.
2.High tensile alloy bars shall meet the requirements of AASHTO M 275. Unless otherwise approved by the Engineer , the Contractor shall furnish two test bars per diameter size, per heat number. Each test bar shall be 5 feet in length. All testing specimens shall be furnished free of cost. If test specimens are not delivered in time for tests to be performed before time of use, the Contractor may elect to incorporate materials into the work at the Contractor's own risk. All test specimens shall be representative of the furnished material lot. If ordered by the Engineer , selection of test samples shall be witnessed by the Engineer's representative, at any location chosen by the Engineer. All prestressing unit materials shall be subject to interim inspection and testing, before, during and after incorporation into the work, as ordered by the Engineer .
714.02 Anchorage Assemblies. If the anchorage assemblies are not attached to the
reinforcement samples, the Contractor shall furnish two anchorage assemblies, complete with distribution plates, for each size or type to be used when requested by the Engineer .
714.03 Post-tensioning Products. The following lengths of materials shall be furnished by the
Contractor :
1.For strand to be furnished with fittings; 5 feet between near ends of fittings.
2.For bars to be furnished with threaded ends and nuts; 5 feet threads at ends.
Source: Colorado Standard Specifications for Road and Bridge Construction, 2023 Edition. Pages 883–896 of 943.