(b) Thermoplastic striping material shall conform to the following: (1) Solid form (2) Flame-spray Powder.. AASHTO M 249. AASHTO M 250. Description and sample specifications for the following materials are included in the Traffic Control Devices Handbook published by the U.S. Department of Transportation, Federal Highway Administration. (c) Preformed Plastic Pavement Markings. 1. 60 mil Retroreflective Pliant Polymer. 2. 60 mil Premix Pliant Polymer. 3. 90 mil Cold Plastic. (d) Pavement Striping Tape and Sheeting. (e) Raised Pavement Markers. When preformed plastic pavement markings are specified in the contract they may be in laid in the bituminous surface prior to the final rolling. These markers shall not be applied on new portland cement concrete pavement until the pavement is one year old. Construction Requirements 634.03 The area to be marked shall be clean and free of loose particles. This may be done by brooming or other methods acceptable to the Engineer. Stripes shall be 4 inches wide. Broken line segments (Dashed or Skip Traffic Stripe) shall be 10 feet in length with 30-foot gaps, or 2 feet in length with 4-foot gaps as shown on the plans. Arrows and letters shall be of the dimensions as shown on the plans. All markings shall present a clean cut, uniform and workmanlike appearance. All markings which fail to have a uniform, satisfactory appearance, either day or night, shall be corrected by the Contractor at his expense. (a) Paint markings. The markings shall be applied by machine methods acceptable to the Engineer. The paint machine shall be of the spray type capable of satisfactorily applying the paint under pressure with a uniformity of feed through nozzles spraying directly upon the pavement. Each machine shall be capable of applying two separate stripes, either solid or skip, at the same time. Each paint tank shall be equipped with a mechanical agitator. Each nozzle shall be equipped with satisfactory cutoff valves which will apply broken or skip lines automatically. Each nozzle shall have a mechanical bead dispenser that will operate simultaneously with the spray nozzle and distribute the beads in a uniform pattern at the rate specified. Each nozzle shall also be equipped with suitable line guides consisting of metallic shrouds or air blasts. The paint shall be thoroughly mixed prior to application, and shall be applied when the air temperature is above 40°F to a clean and dry surface. The minimum rate of application for 4-inch width solid traffic stripes shall be 16.5 gallons per mile. For broken traffic striping the minimum rate of application shall be 6.2 gallons per mile. The minimum rate of application for arrows and letters shall be 0.01 gallon per square foot of markings. Glass beads shall be applied at a minimum rate of 5.5 pounds of beads for each gallon of paint. The painted area shall be protected from traffic until the paint is thoroughly dry. (b) Thermoplastic markings. (1) The application may be either by the hot extruded or the hot spray method as approved by the Engineer. (2) The minimum bond strength when applied to bituminous pavements shall be 125 psi. (3) The application shall be made only on dry pavements when the pavement temperature is 55°F or above. (4) Additional glass beads, conforming to AASHTO M-249, shall be imbedded in the thermoplastic material at a rate of 2 pounds per 100 square feet of stripe. (5) Prior to placement of the thermoplastic stripe on the clean and dry pavement, application of an expoxy resin of the type and amount recommended by the manufacturer of the thermoplastic striping material shall be made. (6) The thermoplastic material shall not be less than 8 inch or more than 3/16 inch in thickness. The width of traffic stripe shall be applied in one application. (7) If necessary, the surface of new and existing bituminous pavement shall be washed with a detergent solution followed by a water rinse to remove any clay coating or other foreign material. On new or existing portland cement pavement, the surface shall be abrasive blast cleaned to remove laitance, curing seal, or other foreign material. (8) The newly extruded stripes shall be protected from damage, and any traffic stripe damaged or failing to properly adhere to the surface of the pavement, shall be replaced with stripe meeting the requirements of these specifications. Method of Measurement 634.04 The accepted quantities of traffic markings will be measured as follows: (a) Linear basis. The quantities to be paid for shall be the number of linear feet of applied traffic stripe markings, measured along the centerline of the road or stripe as outlined below, completed and accepted: Broken traffic stripe shall be measured from end to end of the stripe including gaps. Solid traffic stripe shall be measured from end to end of each continuous stripe. The contract unit price bid on each type and color of striping shall be based on striping of a width of 4 inches. When striping of a width other than 4 inches is specified in the contract, the measured length of striping will be adjusted in the ratio of the specified width to 4 inches. (b) Square foot basis. The quantities to be paid for shall be the number of applied square feet, surface measurement, of traffic symbols and letters, completed and accepted. (c) Gallon basis. The quantity to be paid for will be the actual number of gallons of pavement marking paint used and accepted. Payment will not be made for paint placed in excess of the specified rate of application. Basis of Payment 634.05 The work under this item will be paid for at the contract unit price for the pay items listed below, which price and payment will be full compensation for furnishing and placing all materials, and for all labor, equipment, tools, and incidentals necessary to complete the work prescribed in this section. Payment will be made under: Pay item Pay unit 634(1) Traffic markings, reflectorized, broken, white, or yellow...... Linear feet Linear feet Section 635.-MAINTENANCE AND PROTECTION OF TRAFFIC Description 635.01 This work shall consist of maintenance and protection of traffic through areas of construction; and for furnishing, erecting, and maintaining barricades, warning signs and lights, and other traffic control devices, including flagmen and pilot cars, in reasonably close conformity with the contract provisions and the Manual on Uniform Traffic Control Devices for Streets and Highways. Materials 635.02 Traffic control devices shall conform to the material requirements in the contract provisions. Cases, conditions, and details not covered by plans and specifications shall conform to the applicable provisions of the Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD). Materials paid for under this section shall meet the following requirements: (a) All sign panels, barricades, drums, vertical panels, and flagmen paddles shall have reflectorized sheeting meeting the minimum requirements of Type II reflective material, Section 633. (b) Sign panels-Sign panels shall conform to Section 633 and be orange with black legend unless otherwise noted on the plans or required in the MUTCD. (c) Sign posts-Sign posts shall be Southern Pine, Douglas Fir, or other soft wood acceptable to the Engineer and conforming to subsection 716.03 (except posts need not be treated) and drilled with breakaway holes as shown on the plans. (d) Barricades-Type I, II or III barricades shall be constructed of wood, metal, or plastic. The Type II barricades shall collapse when tipped over. (e) Cones-Cones shall be manufactured of a material capable of withstanding impact without damage to the cones or vehicles. All cones shall be orange colored and highly visible both in daylight and darkness. Cones shall be capable of remaining upright during normal traffic flow and wind conditions in the area where they are used. (f) Vertical panels-Shall be constructed of wood, metal, or plastic. (g) Drums Drums shall be metal, 55-gallon. Plastic drums may be used, subject to the Engineer's approval, if they reasonably meet the required size, shape, and function of the metal drums. (h) Construction guardrail-Construction guardrail shall conform to Section 606 for posts and steel rail. Used guardrail material will be permitted providing it is neat in appearance, straight, and is approved by the Engineer. (i) Temporary concrete barriers-Temporary concrete barriers shall conform to the requirements of Section 606 and the plans. Yellow reflectors having a minimum dimension of 3 inches shall be mounted on top or on the side of the barrier, 2 feet above the pavement surface, on ten foot centers or as directed by the Engineer. (j) Warning lights (flashing or steady)—Warning lights shall be Type A (low intensity flashing), Type B (high intensity flashing), or Type C (steady burn), and meet the minimum requirements of the MUTCD (section 6D-5) and the minimum requirements of the Institute of Transportation Engineers Standard for Flashing and Steady-Burn Barricade Warning Lights. (k) Flashing arrow boards-Flashing arrow boards shall be a minimum of 4 feet high and 8 feet wide, and shall be finished with flat black enamel. A minimum of 15, No. 4412A, PAR 46, 12-volt, amber lamps shall be installed in the panel. The lamp configuration shall be provided with a visor, and the lamps, when illuminated, shall be visible on a clear, cloudless day, for a minimum distance of 1 mile. Flashing arrow boards having only pointing arrowheads (chevrons) shall not be used. Four selectable modes of operation shall be provided as follows: 1. Pass Left Mode.-Lighted arrow flashing left. 2. Pass Right Mode.-Lighted arrow flashing right. 3. Pass Right and Left Modes.-Lighted arrow flashing right and left simultaneously. 4. Caution Travel Mode.-The outside top and bottom lamps on the panel flash on and off simultaneously (in a pattern which will not indicate a direction). The electronic circuitry shall provide between 35 and 50 completed operating cycles of the sign per minute in each of the modes specified above. A switch controlled variable dimming device shall be provided on the control panel which will reduce the voltage on the lamps (dimming) a minimum of 50 percent for nighttime use. Electrical energy to operate the sign shall be obtained from the vehicle on which the sign is mounted or as otherwise approved by the Engineer. Signs mounted on the cab of a truck or on a trailer shall be mounted to provide a minimum of 7 feet between the bottom of the sign and roadway. (1) Flagmen and Pilot Car-Labor and Equipment-Labor under these provisions applies particularly to flagmen and pilot car operators, all of which shall be physically and mentally qualified, trained in their duties, efficient, and courteous, as outlined in the MUTCD. Each flagmen on duty shall be identified with appropriate and distinctive apparel and shall be equipped with highly visible, reflectorized "Stop-Slow" hand sign conforming to current MUTCD standards. Flags will not be permitted unless approved by the Engineer. Pilot cars shall be identified with an appropriate informative sign mounted on the rear thereof and with a rotating amber beacon, and shall be operated at prudent speeds. Strobe light beacons shall not be used. (m) Painted traffic markings shall conform to the requirements of Section 634. Temporary tape traffic markings shall consist of glass spheres of a high optical quality imbedded into a binder on a suitable backing that is precoated with a pressure sensitive adhesive. The spheres shall be of uniform gradation and distributed evenly over the surface of the tape. The color of the tape shall conform to Federal color tolerances for traffic marking paint and be readily visible when viewed under automotive headlights at night. The pavement marking tape, when applied in accordance with manufacturer's recommended procedures, shall be weather resistant and shall show no appreciable fading, lifting, or shrinkage during the useful life of the marking. The tape, as applied, shall be of good appearance, free of cracks, and edges shall be true, straight, and unbroken. (n) Raised pavement markers-Raised pavement markers shall conform to Section 634. They shall be white or yellow as ordered by the Engineer. Construction Requirements 635.03 General. These traffic control devices and services shall be provided and maintained both inside and outside the project limits as needed to facilitate traffic guidance. The Contractor shall keep the entire length of the project in such condition that traffic will be accommodated safely. The plans will show a method of handling traffic. After award of the contract, the Contractor may submit for the Engineer's approval a method for handling traffic other than shown on the plans. However, any additional expense involved in the Contractor's method as opposed to those methods shown on the plans shall be borne by the Contractor. Prior to start of construction operations, the Contractor shall erect such signs, barricades, and other traffic control devices as may be required by the plans and specifications. During nonworking hours and following completion of a particular construction operation, all warning signs, except those necessary for the safety of the public, shall be removed or entirely covered with either metal or plywood sheet so that the entire sign panel will not be visible. Traffic control devices shall be operated only as long as they are needed. There shall be in place only those devices that apply to conditions actually in existence. Reflective materials on signs, drums, barricades, and other devices shall be kept clean, free from dirt, mud, and roadway grime. Scratches, rips, and tears in sheeting shall be promptly corrected by the Contractor to the Engineer's satisfaction. Reflective sheeting materials shall have a maintained reflectivity of not less than 50 percent of the minimum intensity values required for Type II sheeting. Type A warning lights shall only be used on barricades and drums (used singly) or only the first two barricades or drums used in a series for delineation. Type B warning lights shall be used on warning signs, barricades, or independent supports shown in the plans. Type C warning lights shall be installed on barricades or drums and used in a series for delineation (except first two shall be Type A). Temporary centerline traffic markings for two-lane- two-way roadways shall be a broken yellow stripe, 10-feet in length, spaced at 40-foot intervals. A no passing barrier shall be a solid yellow stripe placed 4 to 6 inches from the broken yellow centerline in the lane for which it applies. Temporary lane lines separating two or more lanes of traffic moving in the same direction shall be a broken white stripe, 10-feet in length, spaced at 40-foot intervals. All traffic markings shall be in accordance with the MUTCD and shall be neat in appearance. Temporary centerline traffic markings on multilane undivided roadway (four or more lanes) shall be a double solid yellow stripe. Traffic markings shall be placed parallel to one another, 4 to 6 inches apart. All conflicting construction striping and other pavement markings shall be removed to the fullest extent possible by sand blasting or by some other approved method that does not materially damage the surface or texture of the new pavement. The removal pattern shall be in an uneven shape that does not perpetuate the outline of the removed marking by using diagonal strokes and including some surrounding surface area. Any damage to the surface shall be repaired by the Contractor at his expense by methods acceptable to the Engineer. Accumulations of sand or other material which might constitute a traffic hazard shall be removed. Upon completion, sandblasted area shall be lightly coated with a coal tar emulsion or approved equal. Warning signs with legend UNMARKED PAVEMENT AHEAD shall be used when temporary or permanent pavement markings are obscured and new markings have not been placed. The Contractor shall have a competent Traffic Safety Supervisor who shall be responsible for the Contractor's maintenance of traffic operation. This individual shall have received formal traffic safety training or have had previous experience in supervising maintenance and protection of traffic through highway construction work areas. The Contractor's Traffic Safety Supervisor duties shall include the following: (a) Understand the requirements of the current MUTCD, the contract plans and specifications. (b) Assure compliance of the Contractor's maintenance and protection of traffic activities as required by the contract provisions. (c) Routinely inspect the condition and position of traffic control devices in use on the project and assure that they are in proper working order, clean, visible and conform to the plans and specifications. (d) Review and anticipate appropriate traffic control device needs, advise the Engineer thereof, and assure that such devices as are determined to be necessary for safe and efficient traffic movement are obtained and placed. (e) Coordinate maintenance of traffic operations with the Engineer. (f) Review Contractor's equipment operation and storage and materials handling and storage to traffic safety and operation as required by the contract provisions. |