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Notice of proposed amendments (NPA) to the Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD); request for comments.

The MUTCD, approved by the Federal Highway Administration, is incorporated by reference at 23 CFR part 655, subpart F. The FHWA proposes to amend the Manual on Uniform Traffic Control Devices for Streets and Highways (MUTCD) to include methods to maintain traffic sign retroreflectivity. The proposed maintenance methods would establish a basis for improving nighttime visibility of traffic signs to promote safety, enhance traffic operations, and facilitate comfort and convenience for all drivers. The proposed changes would be designated as Revision No. 2 to the 2003 Edition of the MUTCD.

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