for Highway Construction Page 547 of 71 5 SECTION 630 – PAVEMENT MARKINGS
630.01 Description.
Prep are pavement surface and apply waterborne or preformed thermoplastic retroreflective paveme nt markings.
630.02 Materials.
Provide materials as specified in: Paint ............................................................................................................................................. 707 Glass Beads Used in Pavement Markings ............................................................................... 720.08 Provide preformed thermoplastic meeting AASHTO M 249. Provide paint and beads in original packaging showing the lot numbers. Preapproved lots do not need to be tested. For paint lots that have not been preapproved, sample paint materials in accordance with Idaho IR 7 and submit the samples for testing to the Central Materials Laboratory. For bead lots that have not been preapproved, provide a sample 50 pound bag of glass beads for testing by the Central Materials Laboratory. Receive lab approval before using the paint or glass beads. Allow 2 weeks for laboratory testing.
630.03 Construction Requirements.
A.Waterborne Paint .
1.Each paint appli cation will be 17 mil wet film. Additional applications must be placed 10 or more days apart. Place 2 paint applications for permanent pavement markings and 1 paint application for temporary traffic control pavement markings unless otherwise specified or as Engineer directed. When applying pavement markings on undivided highways to a centerline rumble strips or a seal coat, place the second application of centerline paint in the opposite direction of the first application to ensure full visibility of the pavement markings in each direction.
2.Place at least 7 pounds of glass beads per gallon of applied paint .
3.Apply pavement markings to clean and dry pavement when the pavement temperature is bet ween 50°F and 140°F, and the relative humidity is less than 80 percent.
4.Limit the devi ation of longitudinal pavement markings to less than 2 inches per 100 feet. Provide longitudinal pavement markings with a width tolerance of 5 percent. Limit broken line overlap to 1.5 feet.
5.Use glass beads to provide a minimum retroreflectivity of 225 millicandelas per square meter per lux for white pavement markings and 150 millicandelas per square meter per lux for yel low pavement markings.
6.Do not thin paint .
7.Repair tracking marks and spilled or damaged material.
8.Test Strips. Place a paint (no glass beads) test strip onto a clean, smooth ferrous metal panel to determine pavement marking uniformity and thickness. Measure pavement marking thickness in accordance with ASTM D7091. Calculate the applied wet film thickness using the percent volume of solids provided by the manufacturer as follows: for Highway Construction Page 548 of 71 5 M = (measured dry film thickness) ÷ (percent volume of solids) Where: M = Wet film Thickness (mils) of paint placed. Place test strip 2 to determine glass bead application and retroreflectivity. Test in accordance with ASTM E1710. Place test strip 3 when broken line or dotted pavement markings are used.
9.Reporting. Provide the results of retroreflectivity testing , paint and glass bead quantities applied, and paint and glass bead material invoices daily. The wet f ilm thickness verification will be calculated using the following equation: M = (G x 19,248) ÷(D x W) Where: M = wet film thickness (mils) of paint placed. G = gallons of paint applied. D = distance (feet). W = width of line (inc hes). Measure and record temperature and humidity at the start of work and 4 to 8 hours after starting. Discontinue work during precipitation events.
B.Preformed Thermoplastic.
1.Apply pavement markings in accordance with the manufac turer’s written installation instructions.
2.Provide a minimum pavement marking thickness of 125 mils.
3.Provide a minimum retroreflectivity of 325 millicandelas per square meter per lux for white pavement markings and 200 mil licandelas per square meter per lux for yellow pavement markings. Test in accordance with ASTM E1710.
4.Provide a minimum skid resistance value of 45 British Pendulum Number (BPN) when tested in accordance with ASTM E303.
C.Testing. Test th e retro reflectivity of installed pavement markings daily. Test in accordance with ASTM E1710. Provide documentation the retroreflectometer has been calibrated within the last year. Take 1 or more readings per mile for each line pattern ins talled. Where less than 1 mile of markings are placed, take 1 set of readings for each line pattern installed.
630.04 Method of Measurement.
The Engineer will measure acceptably completed work as follows:
1.Longitudinal pavement markings will be m easured by the foot. Subtract the length of gaps in broken and dotted line pavement markings from the measured length.
2.Transverse, word, symbol, and arrow pavement markings will be measured by the square foot. for Highway Construction Page 549 of 71 5 630.05 Basis of Payment . The Department will pay for acceptable work as follows: Pay Item Pay Unit Longitudinal Pavement Marking – Waterborne ....................................... FT Longitudinal Pavement Marking – Preformed Thermoplast ic ................. FT Transverse , Word, Symbol, and Arrow Pavement Markings – Waterborne ............................................................................................. SF Preformed Thermoplastic ....................................................................... SF A separate payment will not be made for glass beads. Waste disposal, cleanup, and other items not specifically identified are incidental . For permanent pavement markings, a payment will be made for each application of waterborne paint . Temporary pavement markings will be paid for under 626. for Highway Construction Page 550 of 71 5 SECTION 631 – RUMBLE STRIPS
631.01 Description.
Construct rumble strips.
631.02 Materials.
Provide materials as specified in: Fog Coat ....................................................................................................................................... 408 Emulsified Asphalts ................................................................................................................. 702.03 Provide CSS -1 or CSS -1H diluted emulsified asphalt for the fog coat .
631.03 Construction Requirements.
Construct a 500- foot rumble strip test section within the project site for approval before proceeding. Limit the longitudinal rumble strip deviati on to less than 2 inches per 100 feet. Remove debris and apply fog coat as specified in 408. When applicable, remove and dispose of debris before opening adjacent lane to traffic. When rumble strips are installed under pavement markings, place 1 application of temporary pavement markings, construct and fog coat rumble strips, then place 2 applications of pavement markings as specified in 630.
631.04 Method of Measurement.
The Engineer will measure acceptably completed rumble strips by the mile.
631.05 Basis of Payment .
The Department will pay for accepted work as follows: Pay Item Pay Unit Rumble Strips ......................................................................................... Mile Debris removal, waste disposal, and emulsified asphalt are incidental to rumble strip installation. Rumble strips that deviate 2 inches or greater longitudinally from the initial marking will be paid at 50 percent of the unit price for the length of the deviation. Deviations of 4 inches or greater longitudinally from the mar king will be paid at 0 percent of the unit price for the length of the deviation. The length of the deviation will be measured to the nearest foot. The first application of pavement markings will be paid for as temporary pavement markings as specified in 626. The permanent pavement markings will be paid as specified in 630.
Source: Idaho Standard Specifications for Highway Construction, 2023 Edition. Pages 583–585 of 768.