557 SNOWPLOWABLE RAISED PAVEMENT MARKERS

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557.01 DESCRIPTION.
Furnish and install new Snowplowable Raised Pavement Markers (SRPM) and replacement components as specified and directed. Install SRPM in holders or direct to pavement in grooves at the locations as specified and in conformance with the Maryland Manual of Uniform Traffic Control Devices (MdMUTCDMaryland Manual on Uniform Traffic Control Devices).
557.02 MATERIALS.
Holders       951.07
Pavement Marker Reflector Lenses       951.07
Epoxy Holder Adhesive       951.07
Lens Adhesive       951.07
Snowplowable Raised Pavement Markers are durable materials. Select SRPMs from the Qualified Products List (QPL).
557.03 CONSTRUCTION.
Refer to 549.03.
557.03.01 Quality Control. 549.03.01.
557.03.02 Quality Assurance. 549.03.02.
557.03.03 Quality Control Test Strip. 549.03.09. Install a minimum of 10 groove cuts spaced as specified to verify the accuracy and ability of the equipment and personnel. Replace any incorrect groove cuts and any incorrect casting placements within the test strip at no additional cost.
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. Installing markers on wet pavement surfaces is prohibited.
(c) Replace any incorrect groove cut, incorrect casting 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.
(a) SRPM Holder – Steel.
(1) Install new steel holders with lenses affixed per D 4383 and the manufacturer’s recommendations. The installed height shall not exceed 0.25 in. above the road surface. Do not install new steel holders that have damaged holders or lenses.
(2) Install steel holders free of dirt, dust, oil, grease, rust, moisture, or any foreign matter that will impair adhesion to the pavement. Remove any material that inhibits retroreflectivity of the reflector lens without damage to the lens surface. Clean each contaminated casting by sand blasting, wire brushing or other approved procedure to remove all foreign matter prior to installation. Do not use chemicals to remove rust.
(3) Cut the groove for the holder to the appropriate dimensions to allow 0.125 in. side to side movement. All leveling lugs on the holders shall contact the pavement. The leading and trailing edges of the holders shall lie below the pavement surface and the holders shall seat properly.
(4) Use lenses that are specifically manufactured and approved for use as steel holder reflector lenses. Lenses that are manufactured exclusively for direct application to pavements are not permitted for use as substitutes.
(b) SRPM Holder – Plastic Polycarbonate.
(1) Refer to 557.03.06 (a)(1).
(2) Install plastic holders that are free of dirt, dust, oil, grease, moisture, gloss or any foreign matter that will 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 foreign matter prior to installation so as to not damage holder.
(3) Cut the groove for the holder to the appropriate dimensions to allow 0.125 in. side to side movement. All leveling lugs on the casting shall overlap and contact the pavement and the holders shall seat properly.
(4) Refer to 557.03.06 (a)(4).
(c) SRPM Direct.
(1) Install SRPM Direct lenses per D 4383 and manufacturer’s recommendations or as directed. Use lenses manufactured and approved for use as recessed pavement markers (RPMs). Installed height shall be 0.25 in. below the pavement surface.
(2) Install direct lenses that are free of dirt, dust, oil, grease, moisture, or any foreign matter that will impair adhesion to the pavement. Remove any material that inhibits retroreflectivity of the reflector lens without damage to the lens surface.
(3) Cut the groove for the direct one-way recessed marker reflectors lenses to the appropriate dimensions for properly seating the reflector lens per D 4383 and the manufacturer’s recommendations.
(4) Cut the groove for direct two-way recessed marker reflectors lenses to the appropriate dimensions for properly seating both reflectors per D 4383 and the manufacturer’s recommendations.
(5) Do not use lenses manufactured for use as SRPM Holder as substitute for direct lenses.
557.03.07 Replacement Holder.
(a) Steel Casting Replacement. Do not replace with damaged or removed castings. Do not reuse existing groove cuts. The location of the replacement groove cut shall be within 10 percent longitudinally ahead (with the direction of traffic) and with no lateral deviation exceeding 1.5 in. Permanently patch previously used groove cuts per Sections 504, 505, and 522 or as directed.
(b) Polycarbonate Replacement. Refer to 557.03.07(a).
(c) Direct Replacement.
(1) 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 per the manufacturer’s recommendations.
(2) Reuse existing groove cuts that comply with D 4383.
(3) Repair damaged groove cuts per Section 504, 505, 522, or as directed. 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.
557.05.08 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 per the manufacturer’s recommendations.
557.03.09 Observation Period. Replace damaged, non-retroreflective or missing Pavement Marker Reflector Lenses within 180 days after opening to traffic at no additional cost.
557.03.10 Submittals. Submit product data sheets including instructions for installation, MSDS and a Quality Control Plan for review and approval.
557.04 MEASUREMENT AND PAYMENT.
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.
(a) Snowplowable Raised Pavement Markers will be paid for at the Contract unit price per each. Furnishing and installing SRPM includes the holder, reflector, adhesive and grooving.
(b) Removal of Existing Holders, excluding any incorrect installations, and repair of Groove Cuts will be paid for at the Contract unit price per each.
(c) Replacement of Pavement Marker Reflector Lenses will be paid for at the Contract unit price per each.


SPECIAL PROVISION INSERTS

The following Special Provision Inserts update Section 557 after the official publication of the Standard SpecificationA written description of functional characteristics, or the nature of a construction item to be procured. It may include a. Updated documents may be found within the Standard and Supplemental Specifications for Construction and Materials on the MDOTMaryland Department of Transportation SHA web page.

SPI-Section 557-Snowplowable Raised Pavement Markers. Dated 12/20/2017.