12-1 Division 12
PAVEMENT MARKINGS, MARKERS AND DELINEATION 1205 -1 DESCRIPTION Furnish, install and remove pavement markings in accordance with the contract. 1205 -2 MATERIALS
A.General Refer to Division 10. Item Section Pavement Markings 1087
B.Material Qualifications Use pavement marking materials that are on the NCDOT APL .
C.Performance Poor performance of pavement marking materials at any site, whether or not related to a specific contract may be grounds for nonacceptance of a product on any project under contract. 1205 -3 CONSTRUCTION METHODS Do not use handliners or any other non -truck mounted pavement marking machine to install pavement markings for long line applications of any one line longe r than 1 ,000 feet. Use heated -in-place thermoplastic with skid resistant media for bike lane symbols.
A.Testing Procedures All pavement marking materials and placement will be tested by the Department . Install pavement markings in order to meet the retroreflectivity requirements as measured by a Department approved mobile or handheld retroreflectometer that is on the NCDOT APL .
B.Application Equipment
1.General for all Application Equipment Use pavement marking application equipment such that all parts t hat come in contact with pavement marking material are constructed for easy accessibility during cleaning and maintenance. Keep the marking guns of the application device in full view of the operators at all times. Use applicators that are mobile and maneuverable to the extent that straight lines can be followed and all standard curves can be made in true arcs.
2.Reflective Media Dispensing Equipment Apply reflective media to the surface of pavement long line markings using an automatic high pressurized bead and media dispenser or a pressurized mechanical feed, attached to the marking equipment. Hand liner type equipment is exempt from this requirement. Locate the reflective media applicator at the proper distance behind the application of pavement marking material to provide the proper amount
12-2 of retroreflectivity. Equip the reflective media applicator with an automatic cut- off
control synchronized with the cut -off control of the marking material. Spread the reflective media uniformly over the entire surface of the pavement marking material such that they are partially embedded in the pavement marking. A 60% reflective media embedment depth provides optimum retroreflectivity.
C.Weather Limitations and Seasonal Limitations for A ll Markings Do not place pavement markings when moisture tests conducted on the pavement show signs of moisture presence on the pavement or when it is anticipated that damage caus ed by moisture may occur during the installation and drying periods.
D.Time Limitations for Replacement TABLE 1205 -1 TIME LIMITATIONS FOR REPLACEMENT Facility Type Marking Type Replacement Deadline Full-control -of-access multi- lane roadway (4 or more total lanes) and ramps, including Interstates All markings By the end of each workday's operation if the lane is opened to traffic Multi- lane roadways (3 or more lanes) and ramps Center Line, Lane Line, Railroad symbols , Stop bars , and school symbols By the end of each workday's operation if the lane is opened to traffic (temporary paint with beads may be used) Edge Lines, gore lines and all other symbols By the end of the 3rd calendar day after obliteration Two-lane, two -way roadways All centerline markings, railroad, Stop bars and school symbols By the end of the 5th calendar day after obliteration Edge Lines and all other symbols By the end of the 15th calendar day after obliteration A multilane facility is defined as any roadway having more than two lanes to include a two-lane / two -way roadway with a center two- way left turn lane. Apply center line markings prior to edge line markings.
E.Premarking/Interim /Temporary Markings Premark ing (or layout markings) are small paint spots used by striping c ontractors to establish locations of pavement markings. Premark each installation of the final pavement marking materials before application on new pavement and when required to repla ce existing pavement marking, except when existing markings are visible. Get the premarking inspected and approved by the Engineer before placing the pavement marking materials. Interim paint is a thin layer of pavement marking paint applied at the stripi ng contractor’s option to maintain traffic , instead of durable pavement markings. Apply interim paint to comply with time limitations for placement if final pavement markings cannot be placed. Interim markings shall be no more than 1/4 inch less than the specified line width of the existing markings. Place temporary paint markings for detours, lane shifts , milled surfaces and lifts of asphalt other th an the final pavement surface.
12-3 Review and record the existing pavement markings before resurfacing and reestablish the
new pavement markings using the record of existing markings in conjunction with the Roadway Standard Drawings , unless otherwise directed by the Engineer . Submit the record of the existing pavement markings 7 calendar days before the obliteration of any pavement markings.
F.Surface Preparation and Curing Compound Removal Prepare the pavement to accept pavement markings to ensure maximum possible adhesion. Clean, seal and remove curing compound as necessary to e nsure that the markings ad here to the pavement. Obtain approval from the Engineer for all surface preparation methods before implementing. Pavements shall be free of grease, oil, mud, dust, dirt, grass, loose gravel , winter surface treatments and other deleterious material, before applying pavement markings. Prepare the pavement surface, including removal of curing compound, at least 2 inches wider than the pavement markings to be placed, such that, an additional 1 inch of prepared area is on all sides of the pavement markings afte r they are applied. Remove the groo ves caused by concrete grinders before installing the polyurea pavement marking. Remove all curing compound and surface laitance on Portland cement concrete pavements where long- life pavement markings will be placed. Perform curing compound removal by high -pressure water blasting or grinding methods. Ensure that the surface is free of all residue, laitance and debris before applying the pavement marking. When surface preparation and curing compound removal operations are completed, blow the pavement surface clean by compressed air immediately before installing the pavement markings. If required, apply a primer sealer to pavement surfaces before applying pavement marking material as recommended by the manufact urer. Apply primer sealer in a continuous film at least 2 inches wider than the pavement markings in such a way as not to cause any noticeable change in the appearance of the pavement markings. Conduct all pavement surface preparation including curing compound removal in such a manner that the pavement or joint material is not damaged or left in a condition that will mislead or misdirect the motorist. Repair any damage caused to the pavement, or joint materials caused by surface preparation or the removal of curing compound by acceptable methods and at no additional cost to the Department. Surface preparation and removal of bridge laitance shall be considered incidental to the installation of pav ement marking with the exception of curing compound removal. Where pavement surface preparation results in obscuring existing pavement markings of a lane occupied by traffic, immediately remove the residue, including dust, by approved methods.
G.Applicatio n of Pavement Markings
1.General for all types of Pavement Markings Install pavement marking material that has a uniform thickness, smooth surfaced cross section throughout its entire length, width and length not less than the dimensions specified in the pla ns and that does not exceed the dimension by more than 1/2 inch. Do not apply pavement marking materials over a longitudinal joint. Mask all bridge joints for removal of surface laitance, existing markings and application of new markings as directed by the Engineer. This work will be incidental to the installation of the pavement markings.
12-4 Install pavement marking lines that are straight or have uniform curvature and
conform to the tangents, curves and transitions as specified in the plans. Produce finishe d lines that have well defined edges and are free of horizontal fluctuations. Do not exceed 1/2 inch in lateral deviation from the proposed location alignment at any point. Any greater deviations may be cause for requiring the material to be removed and replaced at no additional cost. Apply all longitudinal pavement marking lines 8 inches or less in width with one pass of the pavement marking equipment. Pavement marking lines greater than 8 inches in width and pavement marking symbols may be applied with multiple passes of the pavement marking equipment . Install all pavement marking lines, stop bars, characters and symbols that require multiple passes of the application equipment such that there are no gaps separating the application passes. Install chara cters and symbols so that they conform to the sizes and shapes shown in the plans. Protect the pavement markings until they are track free. If required by the Engineer, repair any markings tracked by a vehicle by acceptable methods. Remove all pavement ma rking materials spilled on the road surface by acceptable methods. Use yellow, white and black pavement markings, without reflective media that visually match the color chips that correspond to the AMS -STD -595 for the se colors. Use markings that when subjected to accelerated weathering as described in U.S. Federal Specification No. TT P-1952 are within the tolerance limits of the color chips listed below: White : Color No. 17886 Yellow: Color No. 13538 Black : Color No. 37038
2.Reflective Media Application “Drop -on” is the me thod where reflective media are dispensed by a pressurized mechanical feed or high pressure means onto the pavement marking as it is applied to the pavement. Reflective media dispensing for symbols stop bars and characters may be accomplished by gravitational methods .
H.Observation Period Maintain responsibility for debonding and color of the pavement markings during a 12 month observation period beginning upon final acceptance of the project a s defined under Article 105- 17. Guarantee the markings under the payment and performance bond in accordance with Article 105 -17. During the 12 month observation period, provide pavement marking material that shows no signs of failure due to blistering, chipping, bleeding, discoloration, smearing or spreading under heat or poor adhesion to the pavement materials. Pavement markings that bonded during application and were approved by the Engineer , but debond due to snowplowing will not be considered a failed marking. Replace, at no additional expense to the Department, any pavement markings that do not perform satisfactorily under traffic during the 12 month observation period.
I.Removal of Pavement Mark ings This work includes the removal of all types of pavement marking lines, symbols and characters including removal for long life marking preparation. This work does not
12-5 include removal of removable tape pavement markings.
Remove pavement marking lines, characters and symbols by acceptable methods to the Engineer that will not materially or structurally damage the surface or the texture of the pavement. Leave the pavement surface in a condition that will not mislead or misdirect the motorist. Where existing pavement markings are to be removed and replaced by other pavement markings, do not begin removal until adequate provisions have been made to complete the installation of the replacement markings. Remove pavement markings such that the surface is in proper condition for adequate bonding of the new markings. Promptly remove any material deposited on the pavement as a result of removing pavement markings as the work progresses by acceptable methods. Provide the equipment necessary to cont rol dust and the accumulation of debris resulting from the removal process. The removal equipment shall provide dust control and the capture of the removed material shall be done using a separate vacuum equipped vehicle or other approved system. Perform the recovery process within the same operation as the removal. Do not let traffic use the lane where the removal is taking place until the recovery system is finished. Should the recovery system fail, cease removal operations until the recovery system is properly operating. The Contractor is responsible for all cleanup and proper disposal of all removed debris from the project site. When using a grinding method for pavement marking removal, the equipment shall have multiple heads working in tandem or have a removal head with operator dialed controls to result in a planed surface and provide adequate preparation of the surface to accept the new marking material. Do not use high pressure water blasting on asphalt. Application of polyurea over existing pavem ent marking materials will require at least 95% of the existing pavement marking material to be removed; however, if one 15 mil application of paint was placed on asphalt pavement less than 6 months old, do not remove the existing paint pavement markings. Thermoplastic may be installed over existing thermoplastic on asphalt. Application over existing pavement marking materials other than thermoplastic will require the existing pavement marking material to be removed so that at least 85% of the existing pavement marking surface is removed. Before applying thermoplastic pavement markings over the existing thermoplastic pavement markings, remove at least 25% of the oxidized existing thermoplastic. On newly installed failed thermoplastic th at is to be removed and replaced, remove a minimum of 85% of the existing thermoplastic. However, if one 15 mil application of paint was placed on asphalt pavement less than 6 months old, do not remove the existing paint pavement markings. Use black color #37038 in paint or tape, as determined by Contractor, to cover any remaining conflicting pavement marking after removal from asphalt pavement surfaces. Do not use black paint or tape on concrete pavement surfaces. The black paint will not have a defined shape or edges with a width not exceeding double of the existing lines. When traffic patterns are changed in work zones due to construction or reconstruction, remove all conflicting pavement markings, symbols, and characters that conflict with the new tra ffic pattern before switching traffic to the new traffic pattern. Unless behind barrier, any pavement marking, symbol, or character not used for the new traffic pattern which is within 6 feet of the new traffic pattern markings shall be considered conflicting.
J.Pavement Marking Installer Qualifications Ensure at least one member of every pavement marking crew is certified through the NCDOT Pavement Marking Technician Certification Process. Keep the certification current throughout the life of the project. A certified crew member shall be present
12-6 anytime this work is being performed. The certified crew member is not required to be
the same person throughout the life of the contract. 1205 -4 THERMOPLASTIC
A.Application Equipment
1.General Use application equipment constructed to assure continuous uniformity in the thickness and width of the thermoplastic pavement marking. Use application equipment that provides multiple width settings ranging from 4 inches to 12 inches and multiple thickness settings to achieve the required thickness above the surface of the pavement as shown in Table 1205- 3 of the Standard Specifications . Special thickness equipment may be required for in lane or shoulder transverse rumble strip pavement markings. Do not use spray therm oplastic unless approved by NCDOT’s Signing and Delineation Unit.
2.Premelting Kettle Use equipment to install hot thermoplastic pavement marking material that includes an oil-jacketed or air -jacketed premelt kettle for uniform heating and melting of the thermoplastic material. Use a kettle that is equipped with an automatic thermostat control device to provide positive temperature control and continuous mixing and agitation of th e thermoplastic material. Do not premelt thermoplastic material in handliner type equipment.
3.Applicator Storage Kettle Equip long line pavement marking vehicles with an automatic thermostat control device to maintain the thermoplastic material at the appl ication temperature and provide continuous mixing and agitation of the thermoplastic material during installation. Construct the equipment so that all mixing and conveying parts, up to and including the application apparatus, maintains the thermoplastic pavement marking material at the specified installation temperature and which has a capacity of at least 1,500 lbs. of molten thermoplastic pavement marking material. Hand transfer is not allowed. Hand liner type application vehicles may contain the premelt ing and applicator storage functions in the same kettle. Agitation and mixing can be done manually. Drag box type and bucket type application is not allowed. Use premelting and applicator storage kettles that meet the requirements of the National Board o f Fire Underwriters, the National Fire Protection Association and State and local authorities.
B.Weather Limitations and Seasonal Limitations Do not apply thermoplastic pavement markings on existing or new pavements unless the ambient air temperature and the temperature of the pavement is 50° F or higher. Do not apply thermoplastic pavement markings between the dates specified below: East of I -95 December 15 and the following March East of I -77 to and including I -95 November 30 and the following April West of and including I -77 November 15 and the following April Exception to the above: When traffic is maintained on a portion of roadway and thermoplastic pavement marking will not be placed within 30 calendar days due to seaso nal limitations, place pavement marking paint and beads in accordance with Subarticle 1205- 8(C).
12-7 (C) Application
Use only thermoplastic markings that are of the hot, machine applied type. Apply thermoplastic pavement markings by extrusion methods only. Extrusion may be accomplished using either conventional extrusion equipment or ribbon gun extrusion devices. The stem portion of straight arrows shall be applied in a single pass and the stem portion of turn arrows is to be applied in no more than 2 passes of t he application equipment. Arrowheads may be applied by multiple passes of the application equipment, not to exceed 3 passes. Apply reflective media uniformly to the surface of the molten thermoplastic material so the beads and highly reflective media are partially embedded and at a rate recommended by the manufacturer to obtain the minimum reflectance values. For highly reflective markings, a double drop system consisting of reflective media is required. Produce in place markings with minimum retroreflec tive values shown in Table 1205- 2, as obtained with a Department approved mobile or handheld retroreflectometer. Retroreflective measurements will be taken within 30 days after final placement of the pavement marking. TABLE 1205 -2 MINIMUM REFLECTOMETER REQUIREMENTS FOR THERMOPLASTIC Item Color Reflectivity Standard Glass Beads White 375 mcd/lux/m2 Yellow 250 mcd/lux/m2 Highly Reflective Media White 800 mcd/lux/m2 Yellow 600 mcd/lux/m2 Ensure that the marking is uniformly retroreflective upon cooling and has the ability to resist deformation caused by traffic throughout its entire length. A thin layer of interim pavement marking paint at the proper width may be placed before installing the thermoplastic markings. If this option is chosen, when not specified in the plans or by the Engineer, direct payment for the paint will not be made. Cover any such thin layer of pavement marking paint with thermoplastic pavement marking within 30 calendar days of placement. Apply the thin layer of pavement marking paint and beads at the rate necessary to produce a dry film thickness of 5 to 8 mils. Apply reflective media at a rate per manufacturer’s recommendation in order to obtain required retroreflectivity shown in Table 1205 -6. Provide drainage openings at intervals of 250 feet in edge lines placed on the inside of curves and in edge lines on the low side of tangents. Provide openings that are no more than 12 inches and at least 6 inches in length. Produce a cross -sectional thickness of the thermoplastic markings above the surface of the pavement in accordance with Table 1205 -3. TABLE 1205 -3 THICKNESS REQUIREMENTS FOR THERMOPLASTIC Thickness Location 240 mils In-lane and shoulder -transverse pavement markings (rumble strips) . These markings may be placed in 2 passes. 90 mils Center lines, skip lines, transverse bands, mini -skip lines, characters , bike lane symbols, crosswalk lines , edge lines, gore lines, diagonals and arrow symbols.
12-8 (D) Observation Period
In addition to the requirements of Subarticle 1205- 3(H), maintain responsibility for minimum retroreflective values for a 30 -day period beginning upon the Engineer’s acceptance of all markings on the project. Guarantee retroreflective values of the markings during the 30 -day period under the payment and performance bond in accordance with Article 105 -17. 1205 -5 POLYUREA
A.Weather Limitations and Seasonal Limitations Do not apply polyurea pavement markings on existing or new pavements unless the ambient air temperature and the temperature of the pavement is 40°F or higher. Do not apply polyurea pavement marking between November 15 and the following February 28 unless t he surface is free from winter surface treatment applications .
B.Application Install polyurea pavement marking lines that have a minimum dry thickness of 30 mils. Using the polyurea application equipment, apply the pavement marking materials simultaneousl y. Apply the polyurea resin, mixed at the proper ratio according to the manufacturer’s recommendations, to the pavement surfaces within the proper application temperatures as determined by the material manufacturer. Inject reflective media into the molte n (liquid) polyurea pavement markings. For double drop system s the two reflective media shall be dropped separately. Wait at least 15 days before applying polyurea on new asphalt. Place a thin layer of pavement marking paint at the proper width before applying the polyurea markings during the 15 day waiting period. Apply the thin layer of pavement marking paint and beads at the rat e necessary to produce a dry film thickness of 5 to 8 mils. Apply reflective media at a rate per manufacturer’s recommendation in order to obtain required retroreflectivity shown in Table 1205 -6. Direct payment for the pavement marking paint will not be made. Cover any such thin layer of paint with polyurea pavement marking within 30 calendar days of placement. If paint is placed on concrete before applying polyurea, remove 100% of the paint b efore installing polyure a. Apply reflective media uniformly to the surface of the polyurea material so that the reflective media are partially embedded and at a rate recommended by the manufacturer to obtain the minimum reflectance values. Produce in pl ace markings with minimum retroreflective values shown in Table 1205- 4, as obtained with a Department approved mobile or handheld retroreflectometer. Retroreflective measurements will be taken within 30 days after final placement of the pavement marking. Produce marking that, upon curing, is uniformly reflectorized and has the ability to resist deformation caused by traffic throughout its entire length.
C.Observation Period In addition to the requirements of Subarticle 1205- 3(H), maintain responsibility for minimum retroreflective values for a 30 -day period beginning upon the Engineer’s acceptance of all markings on the project. Guarantee retroreflective values of the markings during the 30 -day period under the payment and performance bond in accordance with Article 105 -17.
12-9 Table 1205 -4
MINIMUM REFLECTOMETER REQUIREMENTS FOR POLYUREA Item Color Reflectivity Reflective Media White 375 mcd/lux/m2 Yellow 250 mcd/lux/m2 The installer may choose to use an AASHTO Type 4/Type 1 or AASHTO Type 3/Type 1 double drop system, but no price adjustment will be made, and these systems will be incidental to the polyurea pavement marking. 1205 -6 COLD APPLIED PLASTIC
A.Application Equipment Use mechanical application equipment, defined as a mobile pavement marking machine specifically designed for use in applying pressure sensitive pavement marking tape of varying widths up to 12 inches . Use an applicator equipped with rollers to provide initial adhesion of the preformed, pressure sensitive marking tape with the pavement surface. Symbols and legends may be tamped by hand but shall be rolled with a weighted rolle r as per the manufacturer’s recommendations. Tamp the cold applied plastic pavement marking material with a 200 lb. weighted roller as per the manufacturer recommendations. Surface preparation adhesive may be required depending on the type of cold applied plastic. Refer to the manufacturers’ specifications before applying cold applied plastic . Most overlay tape installations should be conducted at an ambient air temperature of 60°F and rising and a surface temperature of 70° F with an overnight temperatur e at least 40°F the night before application. Check the manufacturer’s specifications for actual requirements. Install cold applied plastic pavement markings at ambient air temperature and pavement surface temperature per manufacturer’s specifications. Wait at least 24 hours after a rain before applying cold applied plastic pavement marking. Cold applied plastic pavement markings shall be between 15 to 90 mils thick.
B.Types of Cold Applied Plastic At the time of installation, cold applied plastic pavement markings shall meet Table 1205- 5. TABLE 1205 -5 REFLECTOMETER REQUIREMENTS FOR COLD APPLIED PLASTIC TAPE Type Color Reflectivity Type 1 - Permanent Standard Tape White 400 mcd/lux/m2 Yellow 300 mcd/lux/m2 Type 2 - Permanent High Performance Tape White 500 mcd/lux/m2 Yellow 300 mcd/lux/m2 Type 3 - Permanent Wet Reflective High Performance Tape (Wet) White 250 mcd/lux/m2 Yellow 200 mcd/lux/m2 Type 3 - Permanent Wet Reflective High Performance Tape (Dry) White 500 mcd/lux/m2 Yellow 300 mcd/lux/m2 Type 4 - Removable Tape White 700 mcd/lux/m2 Yellow 400 mcd/lux/m2 Type 3 w et reflective tape shall meet Table 1205- 5 retroreflective values , both wet and dry. The value measured under wet conditions shall be measured in accordance with ASTM E1710 when using a portable retroreflectometer and in accordance with ASTM E2177 . If the Contractor elects to use Type 3, Type 3 will be paid for as Type 2.
12-10 (C) Observation Period
In addition to the requirements of Subarticle 1205- 3(H), maintain responsibility for minimum retroreflective values for a 30 -day period beginning upon the Engineer’s acceptance of all markings on the project. Guarantee retroreflective values of the markings during the 30 -day period under the payment and performance bond in accordance with Article 105 -17. 1205 -7 HEATED -IN-PLACE THERMOPLASTIC
A.Application Equipment Apply heated -in-place thermoplastic using a propane blow torch and other material as recommended by the manufacturer.
B.Weather Limitations Apply heated -in-place thermoplastic only when ambient air temperature and pavement surface temperature is 40°F and rising.
C.Applications Apply heated -in-place thermoplastic on asphalt or concrete per manufacturer’s specifications. The manufacturer shall certify the installer of heated -in-place thermoplastic . Install heated -in-place thermoplastic in lane route shields that are capable of adhering to both asphalt and concrete pavements . Installation shall be in accordance with manufacturer’s specifications . Use a one part primer sealer when installing heated -in-place thermoplastic on concrete. The Contractor may choose to use heated -in-place thermoplastic symbols, characters and transverse lines inst ead of molten thermoplastics pavement markings. Produce a cross sectional thickness of installed heated -in-place thermoplastic markings above the surface of the pavement after installation and upon cooling in accordance with Table 1205- 3. For initial minimum retroreflective value requirements, see Subarticle 1205 -4(C).
D.Observation Period In addition to the requirements of Subarticle 1205- 3(H), maintain responsibility for minimum retroreflective values for a 30 -day period beginning upon the Engi neer’s acceptance of all markings on the project. Guarantee retroreflective values of the markings during the 30 -day period under the payment and performance bond in accordance with Article 105 -17. 1205 -8 PAINT
A.Application Equipment The equipment to apply paint to pavements shall be a truck mounted pneumatic or airless spray machine with suitable arrangements of atomizing nozzles and controls to obtain the specified markings. Paint pavement markings application equipment shall be capable of placing double solid lines, single solid lines, intermittent skip lines or a combination of solid and intermittent skip lines in a single pass. This equipment shall also have an internal timing mechanism for measurement and controlled output of required line lengths. The paint applicator equipment shall have at least two paint tanks with a minimum 60 gal capacity and one tank for glass beads with at least 500 lb. capacity. The s pray guns us ed for hand held paint pavement marking application shall be operable from the application
12-11 truck. All metal parts that hold or transfer paint pavement marking material shall be
stainless steel. The paint trucks shall be equipped with quick action valves. The required gauges and pressure regulators shall be conveniently located and in full view and reach of the operator. Paint strainers are required in paint supply lines. The paint applicator shall be equipped with a dispenser for the reflective media as described in Subarticle 1205- 3(B)(2). Provide a reflective media dispenser that operates automatically and simultaneously with the paint applicator through the same mechanism and that is capable of adjustment and designed to provide uniform flow over the full length and width of the stripe as specified in Subarticle 1205 -3(G)(2). Provide spray guns for hand application of detail markings, symbols and legends. A hand operated push type applicator with a glass bead dispenser may be used for radii and parki ng spaces.
B.Weather Limitations Apply paint only when the ambient air temperature and pavement surface temperatures are at least 40°F and rising and no more than 160°F.
C.Application Final pavement marking applications of paint shall be placed in 2 applications of 15 mils wet each. Apply the second application of paint upon sufficient drying time of the first. Each application of paint shall consist of reflective media applied at a r ate to immediately obtain the minimum retroreflective values. When paint is required by the Engineer or Traffic Control Plan for temporary pavement markings during temporary traffic patterns, apply one application of paint at 15 mils wet. If the temporary traffic pattern will last longer than 6 months, apply a second application of paint 6 months after the initial application. Additional applications of paint at 15 mils wet may be applied every 6 months as directed by the Engineer or Traffic Control Plan. For each 15 mil application of paint, apply reflective media uniformly to the surface of the paint material at a rate to immediately obtain the minimum retroreflective values. At the time of installation, produce in -place markings with the minimum retror eflective values shown in Table 1205- 6, as obtained with a Department approved 30 m mobile or handheld retroreflectometer. Maintain the retroreflective values shown in Table 1205 -6 for at least 30 days from the time of placement of the marking material. TABLE 1205 -6 REFLECTOMETER REQUIREMENTS FOR PAINT Item Color Reflectivity Standard Glass Beads White 225 mcd/lux/m2 Yellow 200 mcd/lux/m2 Make sure that the marking is uniformly retroreflectorized upon drying.
D.Observation Period In addition to the requirements of Subarticle 1205- 3(H), maintain responsibility for minimum retroreflective values for a 30 -day period beginning upon the Engineer’s acceptance of all markings on the project. Guarantee retroreflective values of the markings during the 30 -day period under the payment and performance bond in accordance with Article 105 -17. 1205 -9 MAINTENANCE Replace pavement markings that prematurely deteriorate, fail to adhere to the pavement, lack reflectorization or are otherwise unsatisfactory during the life of the project or during the 12 month observation period as determined by the Engineer.
12-12 Upon notification from the Engineer, winterize the project by placing an initial or additional
application of paint pavement marking lines in accordance with Article 1205 -8. 1205 -10 MEASUREMENT AND PAYMENT ____ Pavement Marking Lines will be measured and paid as the actual number of linear feet of pavement marking lines satisfactorily placed and accepted by the Engineer. In addition, Paint Pavement Marking Lines will be paid per linear foot for each 15 mil application placed in accordance with Subarticle 1205 -8(C). The quantity of solid lines will be the summation of the linear feet of solid line measured end -to-end of the line. The quantity of skip or broken lines will be the summation of the linear feet derived by multiplying the nominal length of a line by the number of marking lines satisfactorily placed. ____ Pavement Marking Symbols will be measured and paid as the actual number of pavement marking symbols satisfactorily placed and accepted by the Engineer. In addition, Paint Pavement Marking Symbols will be paid for each 15 mil application placed in accordance with Subarticle 1205 -8(C). ____ Pavement Marking Characters will be measured and paid as the actual number of characters satisfactorily placed and accepted by the Engineer. A character is considered to be one letter or one number of a word message. In addition, Paint Pavemen t Marking Characters will be paid for each 15 mil application placed in accordance with Subarticle 1205 -8(C). In Lane Route Shields will be measured and paid for in units of each that have been satisfactorily placed and accepted by the Engineer . Removal of Pavement Marking Lines will be measured and paid as the actual number of linear feet of pavement marking lines satisfactorily removed and accepted by the Engineer. The quantity of solid lines will be the summation of the linea r feet of solid line measured end -to- end of the line. The quantity of skip or broken lines will be the summation of the linear feet derived by multiplying the nominal length of a line by the number of marking lines satisfactorily removed. No payment will be made for the removal of removable pavement marking tape. Removal of Pavement Marking Symbols & Characters will be measured and paid as the actual number of pavement marking symbols and characters satisfactorily removed and accepted by the Engineer. Curing Compound Removal, Lines will be measured and paid as the actual number of linear feet of pavement surface from which the curing com pounds are satisfactorily removed. All other surface preparation will be incidental to the work covered by this section . Measurement will be made along the surface of the pavement. Curing Compound Removal, Symbols & Characters will be measured and paid as the actual number of symbols and characters for which the curing compound has been satisfactorily removed. All other surface preparation will be incidental to the work covered by this section . Payment at the contract unit price for the various items in the contract will be full compensation for all the items covered by this section. No direct payment will be made for: the work involved in applying the lines, including surface preparation; reapplication of molten pavement marking crossed by a vehicle; re moval of all pavement marking materials spilled on the roadway surface; and repair of markings tracked by a vehicle . Premarking will be incidental to other items in the contract. Unless directed by the Engineer, there will be no direct payment for interim paint. No direct payment will be made for black paint or tape. The 5 to 8 mils of paint installed before placing the polyurea will be incidental to the work of this section.
Source: North Carolina Standard Specifications for Roads and Structures, 2024 Edition. Pages 681–692 of 857.