Federal Highway Administration
400 Seventh St., S.W.
Washington, D.C. 20590
November 29, 2006
Refer to: HSA-10/SS-143
Ms. Shubha Hosalli
Quality Assurance Test Specialist
Carmanah Technologies Corp.
Building 300, 700 Enterprise Crs.
Victoria, BC V8Z 6R4
Dear Ms. Hosalli
Thank you for your letter of August 14, 2006, requesting the Federal Highway Administration's (FHWA) acceptance of your company's "i-Stop®" solar-powered transit stop assembly as a breakaway sign support system for use on the National Highway System (NHS). Accompanying your letter were drawings of the "i-Stop®" system, and information on the Xcessories Squared "Kleen Break" coupler breakaway mechanism. You requested that we find the signage system incorporating the "i-Stop®" and the "Kleen Break" acceptable for use on the NHS under the provisions of the National Cooperative Highway Research Program (NCHRP) Report 350 "Recommended Procedures for the Safety Performance Evaluation of Highway Features."
Testing of the Kleen Break was in compliance with the guidelines contained in the NCHRP Report 350, Recommended Procedures for the Safety Performance Evaluation of Highway Features and was documented in the FHWA acceptance letter SS-131 dated December 2, 2005. Requirements for breakaway supports are those in the American Association of State Highway and Transportation Officials' Standard Specifications for Structural Supports for Highway Signs, Luminaires and Traffic Signals.
The "i-Stop®" solar-powered LED transit stop assembly is a self-contained unit that includes a flashing bus signaling device, a security down light, and an illuminated schedule. Also typically included are one or more street name signs, bus stop identifying "flag," and a bus schedule assembly that includes buttons to activate the light/illumination systems. These assemblies are securely mounted to steel sign posts that utilize the Xcessories Squared "Kleen Break" breakaway coupling device. An illustration of the overall "i-Stop®" installation is attached for reference.
Because the weight of the various components of the "i-Stop®" system weigh less than 50 pounds and are securely affixed to steel poles mounted on crashworthy breakaway supports, the devices described above and shown in the enclosed illustrations for reference are acceptable for use as test level 3 devices on the NHS under the range of conditions tested, when proposed by a State.
Please note the following standard provisions that apply to the FHWA letters of acceptance:
/original signed by /
John R. Baxter, P.E.
Director, Office of Safety Design
Office of Safety
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