557 SNOWPLOWABLE RAISED PAVEMENT MARKERS

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557.01 DESCRIPTION
Furnish and install new snowplowable raised pavement markers (SRPM) and replacement components for existing markers as specified and as directed, and in conformance with the Maryland Manual on Uniform Traffic Control Devices. Snowplowable Raised Pavement Markers are durable materials. Select SRPMs from the Qualified Products List (QPL).
557.02 MATERIALS
Holders       951.07
Pavement Marker Reflector Lenses       951.07
Epoxy Holder Adhesive       951.07
Lens Adhesive       951.07
557.03 CONSTRUCTION
As specified in 549.03.
557.03.01 Quality Control. As specified in 549.03.01.
557.03.02 Quality Assurance. As specified in 549.03.02.
557.03.03 Quality Control Test Strip. As specified in 549.03.09. Install a minimum of 10 groove cuts spaced as specified to verify the accuracy and ability of the equipment and personnel.
Repair or replace any incorrect groove cuts and any incorrect holder placements within the test strip at no additional cost to the Administration.
557.03.04 Pavement Marker Reflector Lenses. Reflector lenses for pavement markers shall be the same color as the adjacent pavement marking except the back side shall be as follows.
(a) One-Way Applications: The backside for One-Way Markers shall be red or blank as specified or as directed.
(b) Two-Way Applications: The backside for Two-Way Markers shall be the same color as the adjacent pavement marking.
557.03.05 General Installation Requirements.
(a) Ensure all materials and equipment needed to perform the installation are on site.
(b) Ensure the road surface and ambient temperatures meet the manufacturer’s recommendations for installation. Do not install markers on wet pavement surfaces.
(c) (c) Replace any incorrect groove cut, incorrect holder placement, or incorrect lens replacement at no additional cost. An additional test strip may be required in the event of incorrect installations.
557.03.06 New Installation. Install SRPMs no later than two weeks after the completion of the final surface or as directed.
557.03.06.01 Recessed SRPMs with Plastic Polycarbonate Holders
(a) Install SRPM according to D4383 and manufacturer’s recommendations.
(b) Install plastic holders that are free of dirt, dust, oil, grease, moisture, gloss or any substances that may impair adhesion to the pavement. Remove any material that inhibits retroreflectivity of the reflector lens without damage to the lens surface. Clean holders to remove all substances prior to installation. Do not damage the holder.
(c) Cut the groove for the holder to the appropriate dimensions to allow 1/4 in. side to side movement. All leveling lugs on the holder shall overlap and contact the pavement and the holders shall seat properly.
(d) Use lenses that are specifically manufactured and approved for use as plastic holder reflector lenses. Do not use markers that are manufactured exclusively for direct application to pavements as substitutes.
557.03.06.02 Recessed Direct SRPMs without Holders
(a) Install direct SRPM lenses according to D4383 and manufacturer’s recommendations. Use lenses manufactured and approved for use as recessed pavement markers. Installed height of marker shall be 1/4 in. below the pavement surface.
(b) Install direct lenses that are free of dirt, dust, oil, grease, moisture, or any substances that may impair adhesion to the pavement. Remove any material that inhibits retroreflectivity of the reflector lens without damage to the lens surface.
(c) Cut the groove for the direct one-way recessed marker reflectors lenses to the appropriate dimensions for properly seating the reflector lens according to D4383 and the manufacturer’s recommendations.
(d) Cut the groove for direct two-way recessed marker reflectors lenses to the appropriate dimensions for properly seating both reflectors according to D4383 and the manufacturer’s recommendations.
(e) Do not use lenses manufactured for use with holders as substitutes for direct lenses unless recommended by manufacturer.
557.03.06.03 Recessed Direct SRPMs without Holders
(a) Install direct SRPM lenses according to D4383 and manufacturer’s recommendations. Use lenses manufactured and approved for use as recessed pavement markers. Installed height of marker shall be 1/4 in. below the pavement surface.
(b) Install direct lenses that are free of dirt, dust, oil, grease, moisture, or any substances that may impair adhesion to the pavement. Remove any material that inhibits retroreflectivity of the reflector lens without damage to the lens surface.
(c) Cut the groove for the direct one-way recessed marker reflectors lenses to the appropriate dimensions for properly seating the reflector lens according to D4383 and the manufacturer’s recommendations.
(d) Cut the groove for direct two-way recessed marker reflectors lenses to the appropriate dimensions for properly seating both reflectors according to D4383 and the manufacturer’s recommendations.
(e) Do not use lenses manufactured for use with holders as substitutes for direct lenses unless recommended by manufacturer.
557.03.07 Holder Replacement
(a) Polycarbonate Replacement. Do not replace with damaged or used polycarbonate holders. Existing grooves may be recut for replacement. Repair damaged groove cuts as specified in Sections 504, 505, and 522. Locate the replacement groove cut within one longitudinal ft ahead of the damaged cut in the direction of traffic with no lateral deviation exceeding 1.5 in.
557.03.08 Direct Replacement.
(a) Remove and dispose of any damaged reflector lenses and replace with lenses that conform to the original lens requirements unless otherwise specified or as directed. Install replacement lenses according to the manufacturer’s recommendations.
(b) Existing grooves may be recut to comply with D4383.
(c) Repair damaged groove cuts as specified in Section 504, 505, and 522. Locate the replacement groove cut within one longitudinal foot ahead of the damaged cut (with the direction of traffic) with no lateral deviation exceeding 1.5 in.
557.05.09 Reflector Lens Replacement. Remove from holder and dispose of any damaged reflector lens and replace with a new lens on undamaged steel castings or plastic holders that have missing or damaged lenses. Install replacement lenses according to the manufacturer’s recommendations.
557.03.10 Observation Period. Replace damaged, non-retroreflective or missing Pavement Marker Reflector Lenses within 180 days after opening to traffic at no additional cost.
557.03.11 Submittals. Submit product data sheets including instructions for installation, MSDS and a Quality Control Plan for review and approval.
557.04 MEASUREMENT AND PAYMENT
The payment will be full compensation for all pavement preparation, furnishing and placement of SRPM’s, testing, removal, groove cutting, repair and all materials, labor, equipment, tools and all incidentals necessary to complete the work.
Snowplowable Raised Pavement Markers will be measured and paid for at the Contract unit price per each. The payment includes furnishing and installing SRPM including the holder, reflector, adhesive and grooving.
(a) Recessed SRPMs with Plastic Polycarbonate Holders will be measured and paid for as specified.
(b) Recessed Direct SRPMs without Holders will be measured and paid for as specified.
Removal of Existing Holders or lenses in groove cuts will be measured and paid for at the Contract unit price per each, excluding any incorrect installations or repairs of groove cuts
Replacement of Pavement Marker Reflector Lenses will be measured and paid for at the Contract unit price per each.