JA-8_Section_670_Pavement_Markings.pdf

ALASKA

DEPARTMENT OF TRANSPORTATION

AND

PUBLIC FACILITIES

STANDARD

SPECIFICATIONS

FOR

HIGHWAY CONSTRUCTION

PRICE: $25.00

Attachment JA-8

SECTION 670

ALASKA 2004

SECTION 670

TRAFFIC MARKINGS

670-1.01 DESCRIPTION. Furnish and place traffic markings of the type, color, dimensions, and at the locations documented in the Statement of Work. Meet these specifications and the applicable portions of the Alaska Traffic Manual.

670-2.01 MATERIALS. Use materials that conform to the following:

Methyl Methacrylate Pavement Markings Subsection 712-2.17 Glass Beads for Methyl Methacrylate Markings Subsection 712-2.18

Submit a single certification from the manufacturer of the marking material, for each material combination, certifying the combination of marking material, glass beads and anti-skid aggregate, as furnished, provides the durability, retroreflectivity, and skid resistance specified.

670-3.01 CONSTRUCTION REQUIREMENTS.

1. Methyl Methacrylate Pavement Markings (MMA).

a. General. Before starting work meet with the Government for a prestriping meeting.

At this meeting, do the following:

(1) Furnish a striping schedule showing areas and timing of work, placing materials and the Traffic Control Plans to be used.

(2) Discuss placement of materials, potential problems.

(3) Discuss work plan at intersections.

(4) Discuss material handling procedures.

(5) Provide copies of the manufacturer’s installation instructions and copies of the

Material Safety Data Sheets.

b. Manufacturer’s Representative. Provide the services of a manufacturer’s representative (the “Manufacturer’s Representative”). Ensure the Manufacturer’s Representative observes the application of the pavement marking materials. Cooperate with the Manufacturer’s Representative and the Government to ensure that the materials are placed according to these Specifications and the manufacturer’s recommended procedures.

c. Manufacturer Certified Installers. Install pavement markings using only striping installers certified by the marking materials manufacturer for the specific striping material and method. Submit these certifications to the Government at the Preconstruction Conference.

d. Preparation. Prepare the roadway surface to receive pavement markings according to these Specifications and the manufacturer’s recommendations. Clean and dry the roadway surface. Completely remove contaminants such as dirt, loose asphalt, curing agents, surface oils, or existing road marking materials before applying pavement marking material.

e. Equipment.

(1) Grooving Equipment.

Use grooving equipment that produces a dry cut. Use vacuum shrouded equipment or other equally effective containment procedures.

(2) Marking Equipment.

(a) Longitudinal Marking: Use truck mounted application equipment capable of installing a double centerline and a single shoulder line in a single pass. Use automatic bead applicators that place a uniform layer of beads on the lines. Hand units are not permitted.

(b) Other Markings: Use manual or automatic application equipment. Use stencils or extruders to form sharply defined markings.

f. Application. Apply marking material according to these Specifications and the manufacturer’s recommendations. Use equipment designed and capable of properly mixing at the place and time of application and approved by the manufacturer for the type of product being installed.

Anti-skid Aggregate. During marking material application, anti-skid aggregate will be evenly distributed and visible throughout the top 20 mils of the marking material mixture, and after the application, in the surface of the cured material.

SURFACE APPLIED

Marking thickness will be measured from the pavement surface.

(1) Longitudinal Markings. Apply markings for lane lines, edge lines, and centerlines to yield a thickness of 60 mils.

(2) Other Markings.

(a) Transverse and Symbol Markings:

Apply marking for symbols, arrows, stop bars, railroad symbols, and cross walks to yield a thickness of 60 mils.

(b) Gore Markings:

Apply diagonal gore markings to yield a thickness of 60 mils.

g. Sampling. Record the readings and locations where they were taken and submit them to the Government within 24 hours for evaluation. Thickness of material and depth of slot are measured from the surface of the pavement.

SURFACE APPLIED

(1) For surface applied longitudinal applications, measure the thickness of the lines (above the pavement surface) at the time of application, every 500 feet.

(2) For surface applied other markings measure the thickness in three locations for each marking.

Inspect the markings initially, and again two weeks after placement, to ensure the material has cured properly. Remove soft spots or abnormally darkened areas and replace with material meeting specifications.

The Government may elect to use the Contractor’s readings or perform additional sampling.

670-3.05 PRELIMINARY SPOTTING. Provide the necessary control points at intervals including all changes of direction and changes in the basic configuration of striping, such as at the beginning and ending of no-passing zones on a 2-way, 2-lane roadway. Use these points in preliminary spotting of lines before striping is commenced. Perform preliminary spotting of the lines to be painted and obtain approval for all spotting before striping begins. Preliminary spotting is required for all longitudinal striping, with spacing of spots not to exceed 50 feet.

Reference the lines and markings to be replaced at their existing locations prior to performing any work that may disturb them.

670-3.06 TOLERANCES FOR LANE STRIPING.

1. Length of Stripe. ±2 inches.

2. Width of Stripe. ±1/8 inch.

3. Lane Width. ±4 inches from the width shown on the Plans.

4. Stripes on Tangent. Do not vary more than 1 inch laterally within a distance of 100 feet when using the edge of the stripe as a reference.

5. Stripes on Curves. Uniform in alignment with no apparent deviations from the true curvature.

6. All Stripes. Keep the center of the stripe within planned alignment.

7. Double Stripes. ±1/4 inch.

8. Thickness of Surface Applied. Minimum specified to a maximum of + 30 mils.

9. Depth of Inlay Slot. Minimum specified to a maximum of + 40 mils.

10. Thickness of Inlaid Marking Material. Fill inlay area completely from the bottom of the inlay to the surface of the pavement.

If it is determined that the material is being placed too thin, the beads are not properly placed, the anti-skid aggregate is not visible, or otherwise not to specification, make immediate adjustments to correct the problem.

Pavement markings applied by any method will be unacceptable if:

1. Marking is not straight or wide enough.

2. Thickness of line is not uniform.

3. Thickness of line is less than specified.

4. Material is uncured.

5. Material blackens or is inconsistent in color.

6. Inlay slot is not the specified depth.

7. Inlay slot is not filled to the specified depth.

8. Edge of the markings is not clear cut and free of overspray.

9. Reflective elements are not properly embedded.

10. Retroreflectivity of the markings is less than specified.

11. Anti-skid aggregate is not visible in the marking material during application and the dried surface.

12. Markings exhibit poor adhesion.

13. Color is not as specified.

Perform repairs using equipment similar to the equipment initially used to place the materials.

Do not perform repairs in a “patch work” manner. If more than one repair is required in a single 500 foot section, grind and repair the entire section.

670-3.07 CONTRACTOR’S WARRANTY. Provide a warranty, for the Methyl Methacrylate Pavement Markings, as specified herein.

The period of warranty is 2 years. The warranty period will start on the date the Government accepts the work and authorizes payment.

Pavement markings that do not satisfy the specified performance requirements will be repaired and or replaced by the Contractor. The Government will determine if the failed markings will be repaired or replaced. The Contractor will be notified, in writing, of the marking failure(s) and the corrective measures required including repairs and or replacement.

The Contractor will have 6 months to complete repairs. The Contractor will coordinate the repair start and end dates with the Government.

The warranty period, for all project MMA pavement markings, will stop until corrective work is approved complete by the Government.

Performance Requirements.

1. Retroreflectivity. If retroreflectivity becomes a concern during the warranty period, the Government will measure the retroreflectivity of the area in question. The roadway surface will not be cleaned in preparation for taking readings, but areas of obvious contamination or debris will be avoided.

a. Longitudinal sample areas will be a minimum length of 500 feet and have at least three samples taken.

b. Transverse, symbols and gore samples will be three per transverse line or symbol.

Table 670-1

PAVEMENT MARKING MINIMUM RETROREFLECTIVITY

REQUIREMENTS

Marking Color Retroreflectivity, Minimum Levels

Initial Retroreflectivitya 6 Monthsb

2 Yearsb

Yellow, White 200 mcd/m2-lux 150 mcd/m2-lux 40 mcd/m2-lux

Footnotes:

a. The initial retroreflectivity readings will be completed after the MMA has cured and no more than 7 days prior to the Government accepting the work.

b. The 6 month and 2 year readings will be measured from the date of the initial retroreflectivity readings.

2. Color Stability. The pavement markings shall retain color throughout the warranty period.

Yellow striping will be compared to the PR-1 chart, and shall meet 33538 Federal Yellow.

White striping shall have a minimum daylight reflectance of 84 throughout the Warranty period.

3. Adhesion. For the purpose of the warranty a cumulative 5% or greater loss of longitudinal line of any 500 foot segment of marking and 5% or greater loss of each transverse line, gore stripe and symbol, due to nonadhesion, shall constitute failure of the material in that segment.

Repair. Repair pavement markings as specified by the Government.

Replacement. Replace pavement markings as specified in Section 670-3.01 Construction Requirements 4.f. Application and as specified by the Government.

1. 670-4.01 METHOD OF MEASUREMENT. Section 109 and the following:

1. Mile Basis. By the horizontal distance along centerline from beginning to end of each stripe pattern, excluding gaps for intersections or other openings. Skip stripes will be measured as 1/4 of this distance.

a. Single Stripe: A longitudinal marking less than 6 inches wide, such as, but not limited to, a single center line or edge stripe.

b. Double or Wide Stripe: A longitudinal marking greater than 6 inches wide, such as, but not limited to, double center lines, and auxiliary lane lines.

2. Each. Pavement markings using letters, numbers, and arrows will be measured on a unit basis with each separate word or symbol constituting a unit. Railroad Markings will be measured by the complete unit shown for each lane of travel.

3. Foot Basis. Longitudinal pavement markings, transverse, and gore markings, surface applied or inlaid will be measured by the linear foot of 4 inch wide line. Wider striping will be measured in multiples of 4 inches.

Thickness will be measure from the top of the marking to the top of the pavement surface. Marking material placed in a depression left by pavement line removal will not be included in measuring the thickness of the line.

670-5.01 BASIS OF PAYMENT. At the contract price per unit of measurement for those items listed below that appear on the bid schedule.

Payment for Methyl Methacrylate (MMA) Pavement Markings includes furnishing the Warranty.

Payment for the installation of the pavement markings will be limited to 80% of the amount due until the Government has received a signed Warranty.

For all phases of construction: There will be no separate payment for:

Over-runs of material caused by the variation of the gradation of the asphalt

Additional material required to achieve the thickness specified on open graded pavement

All work and materials associated with pavement markings are subsidiary to 670 items, including but not limited to:

Removal of conflicting markings, including repair of the roadway surface, milled surface or otherwise

Traffic Control required for the installation of permanent and temporary pavement markings, removal of conflicting markings, and repairs

Accept payment as full compensation for cleaning of pavement, painting traffic markings, application of preformed pavement markings, glass beads, installing raised or recessed pavement markers, furnishing paint, glass beads, preformed marking tape and all other materials necessary to complete the work prescribed in this Section.

When Item 670(9) Removal of Pavement Markings is not shown on the bid schedule, it is subsidiary to other items of work.

For traffic markings which do not conform to the requirements of this Section but which are allowed to remain in place, payment will be adjusted as follows:

1. Lump Sum. When payment is on a lump sum basis the price reduction will be the product of the lump sum price times the length of non-conforming markings divided by the total length of markings. For the purpose of this calculation, stripe lengths will be considered as continuous with no deduction for skips or breaks, for each 4-inch width stripe being applied, except that a double centerline stripe (No Pass) will be considered as one stripe.

2. Unit Prices. When payment is on a unit price basis, no payment will be made for those units which are not in conformance.

Payment will be made under:

Pay Item No. Pay Item Pay Unit 670(10) MMA Pavement Markings Lump Sum 670(10A) MMA Pavement Markings, Longitudinal Surface Applied Linear Foot 670(10B) MMA Pavement Markings, Symbols and Arrow(s) Surface

Applied Each

670(10C) MMA Pavement Markings, Transverse and Gore Surface Applied

Linear Foot 670(10D) MMA Pavement Markings, Longitudinal Inlaid Linear Foot 670(10E) MMA Pavement Markings, Symbols and Arrow(s) Inlaid Each 670(10F) MMA Pavement Markings, Transverse and Gore Inlaid Linear Foot

Abrasion Resistance, ASTM D 4060. Less than 90 mg loss on CS-17 wheel, 1 kg/load, 1000 cycles.

Moisture Resistance, ASTM D 4585. Minimum 1000 hours at 100 °F with no change in appearance.

Flexibility, ASTM D 522, Cylindrical Mandrel Bend Test. Bend around 1/2 inch diameter mandrel with no cracking.

Adhesion, ASTM D 4541. Minimum 500 psi on a certified pull test.

Cyclic Weathering, ASTM D 5894. Minimum 5000 hours, 15 cycles with less than 1/16 inch creep from scribe. Use 1/8 inch minimum thickness ASTM A 36 steel panels, having SSPC-SP 10 Near White Blast with 1 to 2 mils angular profile.

SECTION 712

SECTION 712

MISCELLANEOUS

712-2.17 METHYL METHACRYLATE PAVEMENT MARKINGS.

1. Quality Requirements: Use a marking material formulated for the application type specified.

Use a marking material manufactured from new materials and free from dirt and other foreign material. Use a methyl methacrylate based resin system for part “A.” Use benzoyl peroxide system for part “B.”

Extruded or stenciled application: Material formulated for extruded or direct stenciled application with factory intermix beads, and anti skid aggregate and the application of additional surface applied beads.

Submit a manufacturer certification for the methyl methacrylate material, glass beads, and anti-skid aggregate to ensure that the materials furnished conform to these Specifications.

2. Performance Properties:

a. No Track Time: Material must be track free after 15 minutes when applied at 40 mils

(ASTM D 711).

b. Hardness: Shore Durometer, A-1, 80 minimum after 24 hours.

c. Tensile Strength: At break, minimum 125 psi (ASTM D 638).

d. Percent Elongation: Minimum 20% (ASTM D 638).

e. Water Absorption: Maximum 0.5% (ASTM D 570).

f. Chemical Resistance: The material must show no effect after 7-day immersion in anti-freeze, motor oil, diesel fuel, gasoline, calcium chloride, sodium chloride or transmission fluid.

g. Ultra-violet Light: Ultra-violet light must have no effect.

h. Skid Resistance: Minimum 45 units, British pendulum (ASTM E 303).

i. Reflectivity: 200 millicandelas, minimum initial

j. Viscosity: Spray Material: 5 - 12 Pa•s (ASTM D 2196 Method B, LV Model, Spindle #4 at

60 RPM).

k. Color: Yellow, PR-1 Chart, 33538 Federal Yellow. White, minimum daylight reflectance of

84.

3. Composition: The composition is at the discretion of the manufacturer, but must be essentially comprised of resins, reactive monomers, pigments, plasticizer, benzoyl peroxide, aggregate and glass beads. When mixed in the stated ratio, the material must cure to 99% minimum by weight and volume solids.

712-2.18 GLASS BEADS FOR METHYL METHACRYLATE PAVEMENT MARKINGS. Meet the following requirements:

Use the type and quantity of beads specified in writing by the marking material manufacturer required to satisfy the specified performance requirements. The written certification will note the bead coating is compatible with the marking material binder.

1. Bead Manufacturer and Type.

a. Swarco, Megalux-Beads or

b. Approved equal beads

Approved Equal Beads. Equal beads will demonstrate:

(1) Bead coatings compatible with marking materials. Marking Material Manufacturer will certify compatibility.

(2) Lasting retroreflectivity. For the two year specified Warranty Period and

SECTION 712

retroreflectivity levels, Subsection 670-3.07. The Government will determine the test location.