Raised Reflective Pavement Markers Art. 781.03 Size 6 7 8 9 0 6 ft 3.5 2.2 3.8 3.5 3.4 (1.8 m) (0.33) (0.20) (0.35) (0.33) (0.31) 8 ft 6.2 3.8 6.7 6.2 6.0 (2.4 m) (0.58) (0.35) (0.62) (0.58) (0.56) SYMBOLS Symbol Large Size sq ft (sq m) Small Size sq ft (sq m) Through Arrow 11.5 (1.07) 6.5 (0.60) Left or Right Arrow 15.6 (1.47) 8.8 (0.82) 2 Arrow Combination Left (or Right) and Through 26.0 (2.42) 14.7 (1.37) 3 Arrow Combination Left, Right, and Through 38.4 (3.56) 20.9 (1.94) Lane Drop Arrow 41.5 (3.86) -- Wrong Way Arrow 24.3 (2.26) -- Railroad "R" 6 ft (1.8 m) 3.6 (0.33) -- Railroad "X" 20 ft (6.1 m) 54.0 (5.02) -- International Symbol of Accessibility 3.1 (0.29) -- Bike Symbol 4.7 (0.44) -- Shared Lane Symbol 8.0 (0.74) *Table applies to all types of pavement marking materials. SECTION 781. RAISED REFLECTIVE PAVEMENT MARKERS
781.01 Description. This work shall consist of placing permanent and/or
temporary raised reflective pavement markers or replacing the reflective element in a raised reflective pavement marker.
781.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Raised Reflective Pavement Markers ................................................ 1096.01
b.Temporary Raised Reflective Pavement Markers .............................. 1096.02 CONSTRUCTION REQUIREMENTS
781.03 General. The reflector may be attached to the casting prior to or after
the placement of the markers. The depression in the web shall be clean and dry. The reflector shall be laminated to an elastomeric pad and adhesively attached to the casting. The protective paper or plastic film covering the adhesive pad shall be Art. 781.03 Raised Reflective Pavement Markers removed immediately prior to placing the reflector on the casting. Once the film covering is removed, extreme care shall be taken to avoid contamination of the exposed pad surface. An adhesive meeting the marker manufacturer's specifications shall be used. The adhesive shall be placed either on the reflector or on the web in sufficient quantity so as to ensure complete coverage of the contact area with no voids present and with a slight excess after the reflector is pressed in place.
a.Permanent. It shall be the Contractor's responsibility to determine the location of any traffic control devices installed in the pavement before beginning work, and shall conduct work to avoid damage to these devices. Any damage to these devices caused by the Contractor's operation shall be repaired. The pavement shall be cut to match the bottom contour of the marker using a concrete saw fitted with 18 and 20 in. (450 and 500 mm) diameter blades. Diamond blades shall be used on portland cement concrete pavement. The cut shall be clean and completely dry prior to pouring the epoxy. After the cut is cleaned, the configuration shall be checked using a pavement marker. The marker shall fit easily within the cut with the leveling tabs resting on the pavement. If any force is required to place or remove the marker or if the leveling tabs do not rest on the pavement surface, the cut shall be enlarged as necessary. Installations on crowned pavements, super elevations, or ramps shall be cut deeper than those on level pavements if necessary to get proper marker fit. A rapid setting (hard in one hour) epoxy meeting the requirements of AASHTO M 237 shall be poured into the cut to within 3/8 in. (9 mm) of the pavement surface. The installed height for the reflective pavement markers shall be approximately 0.3 in. (7.5 mm) above the road surface. The marker shall then be placed into the epoxy-filled cut. The leveling tabs shall rest on the pavement surface and the marker tips shall be slightly below the pavement surface when properly installed. There shall be no epoxy on the reflective lens. The epoxy, when properly mixed, shall be hard cured in 30-45 minutes. If after one hour, a screwdriver or other appointed instrument can be pushed into the epoxy, the marker and the uncured epoxy shall be removed, and the marker shall be cleaned and the unit reinstalled. The pavement surface temperature and the ambient air temperature shall be at or above 50 °F (10 °C) at the time of installation of the marker for the epoxy adhesive to properly cure. Unless directed by the Engineer, raised reflective pavement markers shall not be laid directly over a longitudinal crack or joint. The edge of a raised reflective pavement marker shall be offset, toward traffic, a minimum distance of 2 in. (50 mm) from the edge of pavement, a longitudinal crack or joint, or a solid lane line. Raised reflective pavement markers shall be centered in the gap between dashed line segments and the finished line of the markers shall be straight. The lateral deviation on any 10 ft (3 m) line shall not exceed 1 in. (25 mm). Raised reflective pavement markers through tangents of reverse curves which are less than 500 ft (150 m) in length shall be installed at the lesser of the two curve spacings. Raised Reflective Pavement Markers Art. 781.04 The reflectors may be attached to the castings either prior to or after the placement of the markers. The depression in the web shall be clean and dry. The reflector shall be placed on the casting with sufficient pressure to firmly seat it in place, minimum load of 100 lb (45 kg). Adhesive material shall not be permitted on the reflective surface of the prismatic reflector.
b.Temporary. The pavement surface which the marker shall be bonded to, shall be free of dirt, curing compound, grease, oil, moisture, or any other material which would adversely affect the bond of the adhesive. The markers shall be placed firmly on the pavement and pressed into place by slowly passing over them with a truck wheel. The pass shall not displace the markers. In lieu of an adhesive pad, an adhesive meeting the marker manufacturer's specifications may be used. The adhesive shall be placed either on the reflector or on the web in sufficient quantity so as to ensure complete coverage of the contact area with no voids present and with a slight excess after the reflector is pressed in place. All markers shall be monodirectional. Markers placed to the left of traffic shall be amber and markers placed to the right of traffic shall be crystal.
c.Replacement. All remaining portions of the existing reflector, and all traces of adhesive, rust, dirt, etc., shall be removed from the marker reflector area by sandblasting or other methods approved by the Engineer. The Contractor shall be responsible for verifying the model numbers of castings as shown on the plans and shall be responsible for installing the proper replacement reflector in each casting. The Contractor shall make certain the casting surface is dry and free of dirt and rust prior to placing the reflector on the casting. The reflector shall be placed on the casting with sufficient pressure to firmly seat it in place, minimum load of 100 lb (45 kg). Adhesive material shall not be permitted on the reflective surface of the prismatic reflector. The pavement surface temperature and the ambient air temperature shall be at or above 50 °F (10 °C) at the time of application of the prismatic reflector.
781.04 Inspection of Raised Reflective Pavement Markers. The
permanent raised reflective pavement marker and/or replacement reflector will be inspected following installation, but no later than November 30. In addition, they will be inspected following a winter performance period that extends from November 30 to April 1 of the next year. Within 15 calendar days after April 1, a final performance inspection will be made. If this inspection discloses any work which does not meet the inspection requirements, the Contractor shall, within 45 calendar days after written notification of the inspection results to the Contractor, completely repair or replace such work to the satisfaction of the Engineer. Measured in its entirety, the work shall be 97 percent intact. Art. 781.04 Reflectors Upon completion of the final performance inspection or after satisfactory completion of any necessary corrections, the Engineer shall notify the Contractor in writing of the date of such final performance inspection and release him/her from further performance responsibility.
781.05 Basis of Payment. This work will be paid for at the contract unit price
per each for RAISED REFLECTIVE PAVEMENT MARKER, RAISED REFLECTIVE PAVEMENT MARKER (BRIDGE), TEMPORARY RAISED REFLECTIVE PAVEMENT MARKER, or REPLACEMENT REFLECTOR. SECTION 782. REFLECTORS
782.01 Description. This work shall consist of furnishing and installing
reflectors on guardrail, barrier wall, and curbs. Guardrail shall include steel plate beam guardrail, bridge rail, and their terminals. Barrier wall shall include concrete barriers and bridge parapets. Curbs shall include mountable and barrier curbs, solid medians, median surfaces, and islands.
782.02 Materials. Materials shall be according to the following.
Item Article/Section
a.Reflectors ............................................................................................... 1097
b.Adhesive (Note 1) Note 1. The adhesive shall be according to the reflector manufacturer’s specifications. For applying the adhesive to concrete, the concrete surface shall be cleaned of form oil, membrane curing compound, protective coat, concrete sealer, or other foreign material. Any laitance shall be removed by grinding, and the thin mortar layer from a normal or rubbed finish per
Article 503 — 15 shall also be removed.
CONSTRUCTION REQUIREMENTS
782.03 General. Reflectors shall be installed in the configurations, locations,
and spacings shown on the plans. When an adhesive is required, the surface to which the reflector is applied shall be free of dirt, curing compound, moisture, paint, or any other material which would adversely affect the bond of the adhesive. The adhesive shall then be placed either on the surface or the bottom of the reflector in sufficient quantity to ensure complete coverage of the contact area and with a slight excess after the reflector is pressed firmly in place.
782.04 Guardrail and Barrier Wall Reflectors. The face of guardrail and
barrier wall reflectors shall be vertical and perpendicular to the surface on which they are installed.
a.Type A Reflectors. Type A reflectors are for use with guardrail and bridge rail. For "W" beam guardrail, the reflector shall be attached by loosening a guardrail bolt, slipping the slotted L-bracket under the head of the bolt, and retightening the bolt. For oval or circular bridge rails, the L-bracket of the
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Source: Illinois Standard Specifications for Road and Bridge Construction, 2022 Edition. Pages 678–681 of 1,217. View official source ↗