Article 1 — Description
Furnish and install raised pavement markers (RPMs).
Article 2 — Materials
2.1 Markers. Furnish RPMs in accordance with the following.
Reflectorized Pavement Markers. DMS -4200 , “Pavement Markers (Reflectorized),” T ypes I- A, I-C, I-R, II-A-A, II-C-C, and II -C- R Traffic Buttons . DMS -4300 , “Traffic Buttons,” W, Y , and B. Round or oval unless otherwise shown on the plans Plowable Reflectorized Pavement Markers. DMS -4210 , “Snowplowable Pavement Markers ,” Types I-A, I-C, I-R, II-A- A, II-C-C , and II -C- R The following are descriptions for each type of RPM . Type I-A. The approach face must retroreflect amber light. The body, other than the retroreflective face, must be yellow. Type I-C. The approach face must retroreflect white light. The body, other than the retroreflective face, must be white or silver -white. Type I-R . The trailing face must retroreflect red light. The body, other than the retroreflective face, must be white or silver -white, except for I -R plowable markers, which may be black. Type II-A-A . The two retroreflective faces (approach and trailing) must retroreflect amber light. The body, other than the retroreflective faces, must be yellow. Type II-C-R . Contains two retroreflective faces with an approach face that must retroreflect white light and a trailing face that must retroreflect red light. The body, other than the retroreflective faces, must be white or silver -white. Type II -C-C . Contain two retroreflective faces (approach and trailing) that retroreflect white light. The body, other than the retroreflective face, must be white or silver -white. Type W. Must have a white body and no reflective faces. Type Y. Must have a yellow body and no reflective faces . Type B. Must have a black body and no reflective faces .
2.2 Adhesives. Furnish adhesives in accordance with the following .
DMS -6100 , “Epoxies and Adhesives,” Type II—Traffic Marker Adhesives DMS -6130 , “Bituminous Adhesive for Pavement Markers” The Contractor may propose alternate adhesive materials for consideration and approval .
2.3 Sampling . The Engineer will sample in accordance with Tex -729-I .
Article 3 — Construction
Remove existing RPMs in accordance with Item 677, “Eliminating Existing Pavement Markings and Markers ,” except for measurement and payment. Furnish RPMs for each class from the same manufacturer. Prepare all surfaces in accordance with Item 678, “Pavement Surface Preparation for Markings,” when shown on the 918 plans. Ensure the bond surfaces are free of dirt, c uring compound, grease, oil, moisture, loose or unsound pavement markings, and any other material that would adversely affect the adhesive bond. Establish pavement marking guides to mark the lateral location of RPMs as shown on the plans and as directed. D o not make permanent marks on the roadway for the guides . Place RPMs in proper alignment with the guides. Acceptable placement deviations are shown on the plans . If necessary, r emove and replace RPMs placed out of alignment or sequence, as shown on the plans or in accordance with this Item, at the Contractor’s expense in accordance with Item 677 (except for measurement and payment) . Use the following adhesive materials for placement of reflectorized pavement markers and traffic buttons , unless otherwise sho wn on the plans : standard or flexible bituminous adhesive for applications on bituminous pavements, and epoxy adhesive or flexible bituminous adhesive for applications on hydraulic cement concrete pavements . Use epoxy adhesive for plowable reflectorized pavement markers. Apply enough adhesives to: ensure that 100% of the bonding area of RPMs is in contact with the adhesive, and ensure that RPMs, except for plowable markers, are seated on a continuous layer of adhesive and not in cont act with the pavement surface. Apply adhesives in conformance with manufacturer’s recommendations unless otherwise required by this Article. Apply bituminous adhesive only when pavement temperature and RPM temperature are 40°F or higher. Do not heat bituminous adhesive above 400° F. Machine agitate bituminous adhesive continuously before application to ensure even heat distribution. Machine- mix epoxy adhesive. Apply epoxy adhesive only when pavement temperature is 50°F or higher. Furnish RPMs free of rust, scale, dirt, oil, grease, moisture, and contaminants that might adversely affect the adhesive bond. Place RPMs immediately after the adhesive is applied and ensure proper bonding. Do not use adhesives or any other material that impairs the functional retroreflectivity of the RPMs. All RPMs must meet performance requirements for at least 30 calendar days after installation. Replace all missing, broken, or non- reflective RPMs. Visual evaluations will be used for these determinations. Upon request, the Engineer will allow a Contractor representative to accompany the Engineer on these evaluations. The Engineer may exclude RPMs from the replacement provisions of the performance, provided the Engineer determines the failure is a result of causes other than defective material or inadequate installation procedures. Examples of outside causes are extreme wear at intersections, damage by snow or ice removal, and pavement failure. Replace all missing or non- reflective RPMs identified during the performance period within 30 days after notificati on. T he end of the performance period does not relieve the Contractor from the performance deficiencies requiring corrective action identified during the performance period. 919 4. MEASUREMENT This Item will be measured by each RPM. This is a plans quantity measurement Item. The quantity to be paid is the quantity shown in the proposal, unless modified by Article 9.2., “Plans Quantity Measurement.” Additional measurements or calculations will be made if adjustments of quantities are r equired.
Article 5 — Payment
The work performed and materials furnished in accordance with this Item and measured as provided under “Measurement” will be paid for at the unit price bid for “Reflectorized Pavement Marker,” “Traffic Button,” or “Plowable Reflectorized Pavement Marker” of the types specified. This price is full compensation for removing existing markers; furnishing and installing RPMs; and materials, equipment, labor, tools, and incidentals . No additional payment will be made for replacement of RPMs failing to meet the performance requirements .