March 8, 2004
Refer to: HSA-10/WZ-171
Mr. Peter Connors
Remcon Plastics, Incorporated
208 Chestnut Street
Reading, Pennsylvania 19602-1809
Dear Mr. Connors:
Thank you for your letter of January 26, 2004, requesting Federal Highway Administration's (FHWA) acceptance of your company's Type I and Type II Barricades as crashworthy traffic control devices for use in work zones on the National Highway System (NHS). Accompanying your letter were drawings of the device and a comparison to generic crash-tested barricades. You requested that we find your company's barricades acceptable for use on the NHS under the provisions of National Cooperative Highway Research Program (NCHRP) Report 350 "Recommended Procedures for the Safety Performance Evaluation of Highway Features."
The FHWA guidance on crash testing of work zone traffic control devices is contained in two memoranda. The first, dated July 25, 1997, titled "INFORMATION: Identifying Acceptable Highway Safety Features," established four categories of work zone devices: Category I devices are those lightweight devices which are to be self-certified by the vendor, Category II devices are other lightweight devices which need individual crash testing but with reduced instrumentation, Category III devices are barriers and other fixed or heavy devices also needing crash testing with normal instrumentation, and Category IV devices are trailer mounted lighted signs, arrow panels, etc. for which crash testing requirements have not yet been established. The second guidance memorandum was issued on August 28, 1998, and is titled "INFORMATION: Crash Tested Work Zone Traffic Control Devices." This later memorandum lists devices that are acceptable under Categories I, II, and III.
A brief description of the devices follows:
The Remcon Type I and Type II barricades are assembled from high density polyethylene parts. It can be fabricated using one or two 12x24 or 8x24 panels on each side which are attached to the legs using 20-¼x1.00 steel bolts and hex nuts. The legs are each 44.5 inches long, and are joined at the top using 13-½x1.5 stainless steel carriage bolts and hex nuts. The panels are manufactured to hold interchangeable transparent diagonal striped "lenses" with retroreflective sheeting affixed to the face of the panels. The total assembled weight using a pair of 12x24 panels above, a pair of 8x24 panels below, and a pair of 3x24 panels at the base for stability and handicap detection, is 21 pounds. The height to the top of the legs when the barricade is deployed is 40.0 inches. The height to the top of the upper panel is 36.125 inches.
The Remcon high-density polyethylene plastic Type I and II barricades are similar in size, weight, and materials to other crashworthy barricades. They can be expected to perform as well as the generic steel leg barricades found acceptable in the FHWA acceptance letter WZ-85 dated November 15, 2001. Therefore, the devices described above and detailed in the enclosed drawings are acceptable for use on the NHS under the range of conditions that the generic barricades were tested, when proposed by a State. NOTE: This acceptance is for the barricades plus reflective sheeting and striping lens (and properly located ballast, if needed), only. If these are to be used with warning lights they should be crash tested with the type of light(s) they will be used with.
Please note the following standard provisions that apply to the FHWA letters of acceptance:
(Original Signed by John R. Baxter)
John R. Baxter, P.E.
Director, Office of Safety Design
Office of Safety