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Safety Acceptance Letter WZ-279Downloadable Version
PDF [620 KB]
1200 New Jersey Ave. S.E. April 27, 2009 In Reply Refer To: HSSD/WZ-279 Mr. John M. Sandy Dear Mr. Sandy: In your letter of March 26, you requested the Federal Highway Administration (FHWA) acceptance of your longitudinal channelizing device, the ATM 590 Water Filled Barrier, for use as a crashworthy traffic control device in work zones on the National Highway System (NHS). Accompanying your letter was the FHWA Office of Safety Design forms and a copy of the crash test report. The test summary, device drawing, and test article description pages are enclosed with the acceptance form. The ATM 590 is intended for use with a maximum capacity of 75 gallons of water in each module as ballast. You requested that we find this device acceptable for meeting Test Level 2 criteria for use on the NHS under the provisions of the National Cooperative Highway Research Program Report 350 "Recommended Procedures for the Safety Performance Evaluation of Highway Features”. This letter is the acknowledgement of the FHWA’s acceptance of your requests. Longitudinal channelizers should not be described as "barriers" because they do not meet crashworthiness requirements for redirection. The FHWA recommendations for labeling each unit or module to indicate limitations of use are enclosed. The original completed forms have been modified by the addition of the FHWA acceptance letter number and the date of our review. The form will be posted on our Web site in the near future.
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