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Interim Approvals Issued by FHWA
Section 1A.10 of the 2003 edition of the MUTCD contains a new provision authorizing the Federal Highway Administration to issue Interim Approvals. Such approvals allow the interim use, pending official rulemaking, of a new traffic control device, a revision to the application or manner of use of an existing traffic control device, or a provision not specifically described in the MUTCD. Interim Approvals are considered by the Office of Transportation Operations based on the results of successful experimentation, studies, or research, and an intention to place the new or revised device into a future rulemaking process for MUTCD revisions.
Any jurisdiction that wishes to use a device or application that has received Interim Approval should submit a written request to the FHWA, Director of the Office of Transportation Operations, 400 7th Street, SW, HOTO-1, Washington, DC 20590. The request must state the location(s) where the device will be used and the jurisdiction's agreement to comply with item F at the bottom of page 1A-10 of the 2003 MUTCD, part of Section 1A.10. A State may request Interim Approval for all jurisdictions in that State.
Interim Approvals that have been issued by FHWA are listed below, with links to the actual approval document and background information for each.
1. August 2, 2004 -- Optional use of wayside horn system (WHS) at highway-rail grade crossings:
2. February
6, 2004 -- Optional use of retroreflective borders on traffic signal
backplates:
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