367 SECTION 760
760.01 Description
This work consists of installing centerline, shoulder, and intersection rumble strips.
760.02 Equipment
Reserved.
760.03 Materials
Use one of the following materials when applying a fog coat to rumple strips: − SS-1h, Section 818.02 F, “Anionic Emulsified Asphalt”; − MS-1 Section 818.02 F, “Anionic Emulsified Asphalt”; or − CSS-1h Section 818.02 E.1 “Cationic Emulsified Asphalt”. When MS -1 is used it may be diluted by the supplier or the Contractor.
760.04 Construction Requirements
A.Shoulder and Centerline Rumble Strips. Mill the shoulder and centerline rumble strips.
B.Intersection Rumble Strips. Saw cut intersection rumble strips at all STOP conditions of state highways. Do not install intersection rumble strips on bridge decks or approach slabs. The Engineer will relocate the intersection rumble strips to a location off the bridge deck and approach slabs.
C.Exclusion Areas. Do not install rumble strips in the areas shown in Table 760-01. Table 760 -01 Type of Rumble Strip Exclusion Areas Shoulder and Centerline Posted speeds of 45 mph or less, urban areas, and curb and gutter sections and 1/2 mile on each end of these areas Shoulder and Centerline Across bridge decks and approach slabs. Shoulder and Centerline 300 feet before and after Automated Traffic Recorders, Environmental Sensor Stations, and Weigh in Motion equipment Shoulder Adjacent to guardrail. Intersection Posted speeds 45 mph or less, urban areas, or areas with curb and gutter 368 D. Sweeping. Immediately after installing the rumble strips sweep and remove the millings from the pavement surface.
E.Fog Coat. On bituminous surfaces, uniformly apply a fog coat across the rumble strips within 48 hours of sweeping. Apply emulsified asphalt at a rate of 0.10 gallons per square yard. Dilute emulsified asphalts with a maximum 50 percent water. For centerline rumble strips, apply fog coat in both directions of travel.
F.Traffic Control.
1.General. Use a TMA as specified in Section 704.04 M, “Protection Vehicle with Truck Mounted Attenuation Device (TMA)” .
2.Centerline Rumble Strip Installation. If the rumble strip operation encroaches in the opposing lane, provide flaggers and 2 sets of the required flagger signing for each direction of travel. Ensure that at least one set of the required flagger signing is in place in each direction of travel whenever work centerline installation is performed. Limit the work area to a maximum of 3 miles.
760.05 Method of Measurement
The Engineer will measure, completed and in place, as specified in Section 109.01, “Measurement of Quantities” and as follows: The Engineer will make no deduction in length for exclusion areas with the exception of areas specified in the first line of Table 760 -01 in Section 760.04 C, “Exclusion Areas ”. The Engineer will measure flagging and traffic control signs as specified in Section 704.05, “Method of Measurement” . The Engineer will count each leg of an intersection receiving rumbles strips as one “Set”.
760.06 Basis of Payment
Pay Item Pay Unit Rumble Strips – Concrete Shoulder Mile Rumble Strips – Concrete Centerline Mile Rumble Strips – Asphalt Shoulder Mile Rumble Strips – Asphalt Centerline Mile Rumble Strips – Intersection Set Flagging and traffic control signs will be paid for as specified in Section 704.06, “Basis of Payment” . Such payment is full compensation for furnishing all materials, equipment, labor, and incidentals to complete the w ork as specified. Section 762 369 SECTION 762 PAVEMENT MARKING
762.01 Description
This work consists of furnishing and installing pavement markings.
762.02 Equipment
A.Paint Application. To apply pavement marking paint and glass beads, use a self -propelled, pneumatic spraying machine with atomizing nozzles or airless nozzles capable of applying two 4 inch to 8 inch wide lines at one time. Equip the spray mechanism with quick opening and closing valves. Use equipment capable of applying the materials at the specified rate and in an even and uniform thickness with clearly defined edges. Use an applicator with reservoirs equipped with agitators that keep the material in a smooth, even mixture. Equip the applicator with an automatic skip control device that applies a stripe of specified length with a linear tolerance of 3 inches. Equip the applicator with a guide boom and make the applicator capable of retracing and applying materials to traffic markings in place. Equip the machine with a dispenser adjusted and synchronized with the paint applicator to distribute the glass beads uniformly on the painted lines using air pressure. Equip the bead dispenser with an automatic cutoff control, synchronized with the cutoff of the striping material. Use hand-operated equipment to place the pavement markings and reflectorized spheres on areas not accessible to the pavement marking applicator.
B.Grooving Equipment. Use grooving equipment that has the following characteristics: − Equipped with diamond blades mounted on a self propelled machine designed for grinding a recess into the pavement surface; − Equipped with a dust collection system capable of removing and containing airborne emissions incurred during grooving operations; − Uses mounted diamond blades on a floating head with controls capable of providing uniform depth and alignment; and − Capable of grooving a total width sufficient to install 4 inch wide pavement marking in a single pass. Do not use equipment that causes strain or damage to the underlying surface of the pavement.
C.Data Logging System (DLS). Use a computerized DLS capable of documenting a minimum length of 300 linear feet.
Source: North Dakota Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 402–403 of 550.