SS235-002020-01.docx
DOCX document 28 KB Posted
- Attached to
- Construction, University Drive Bike Lanes
- Solicitation number
- IFB-114424
- Issued by
- Fairfax County, Virginia
About this file
This is a supplemental specifications document issued by the Virginia Department of Transportation (VDOT) on May 6, 2022, detailing requirements for retroreflectors used in road and bridge construction and maintenance projects. The specifications establish standards for retroreflective surfaces that redirect vehicle headlights to delineate roadways, applicable to pavement markers (both permanent and temporary) and delineators (guardrail, barrier, flexible post, and road edge). Retroreflectors must be approved based on performance data from either the AASHTO National Transportation Product Evaluation Program (AASHTO/NTPEP) or VDOT's own test facility. Inlaid pavement marker holders must be constructed of polycarbonate plastic nominally 4.75 inches wide with breakaway tabs, capable of holding retroreflectors from VDOT's Approved List 22, with retroreflector placement set 1/8 inch below the pavement surface. Pavement markers and delineators must comply with testing and approval procedures outlined in VTM-70 standards.
Aluminum panels used for delineators must meet minimum thickness requirements of 0.064 inch and conform to ASTM B-209, alloy 5052 specifications. The document does not address pricing terms, contract awards, funding sources, or procurement timelines, as it functions as a technical specification standard rather than a solicitation or contract award notice.
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Text version
SS235-002020-01 May 6, 2022
VIRGINIA DEPARTMENT OF TRANSPORTATION
2020 ROAD AND BRIDGE SUPPLEMENTAL SPECIFICATIONS
SECTION 235 – RETROREFLECTORS
SECTION 235 – RETROREFLECTORS of the Specifications is deleted and replaced as follows:
235.01 – Description
Retroreflectors are retroreflective surfaces that redirect the vehicle headlights back to the driver to delineate the road. The retroreflective surface may consist of a plastic prismatic reflector or retroreflective sheeting. Retroreflectors are used with:
· Pavement Markers (Permanent and Temporary)
· Delineators (Guardrail, Barrier, Flexible Post, Road Edge)
Pavement markers and Delineators shall be approved by reviewing performance data from one or both of the following test programs:
(a) AASHTO’s National Transportation Product Evaluation Program (AASHTO/NTPEP). Test data values used for approval may be based upon the data generated per the applicable NTPEP Work Plan.
(b) VDOT Test Facility – VDOT may elect to evaluate performance from their own test facility.
235.02 – Detail Requirements
(a) Inlaid Pavement Markers – Holders for inlaid pavement markers shall be made of polycarbonate plastic nominally 4.75 inches wide excluding breakaway tabs, and shall be able to hold retroreflectors from the Department’s Approved List 22 under Inlaid Pavement Markers.The top of the the retroreflector shall be 1/8 inch below the pavement surface when installed with the breakaway positioning tabs resting on the pavement surface.
Retroreflectors for inlaid pavement markers shall have a nominal width of 4 inches excluding the holders.
(b) Pavement Markers (Temporary) – Refer to VTM-70 for testing and approval
(c) Pavement Markers (Permanent) – Refer to VTM-70 for testing and approval
(d) Delineators – Refer to VTM-70 for testing and approval
(e) Aluminum panels for delineators shall be at least 0.064 inch thick conforming to ASTM B-209, alloy 5052.
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