Deadlines were established in 2007 to implement minimum levels of retroreflectivity for signage per the Manual on Uniform Traffic Control Devices (MUTCD).
Maintaining Minimum Retroreflectivity
1. January 22, 2012: By this date, roadway owners must adopt a plan to ensure that their signs meet Minimum Levels of Retroreflectivity by the dates cited below. The FHWA lists 5 options, among which are simple visual inspection and blanket replacement of groups of signs at the end of their “useful life” as stated by the manufacturer.
2. January 22, 2015: Regulatory and Warning Signs and Post-Mounted Signs must meet retroreflectivity requirements.
FHWA estimated the cost for making these retroreflectivity improvements throughout the entire United States to be $37 million dollars over a 10 year period. The reason that this figure is lower than some estimates reported in the media is that the implementation timetable detailed above was designed to roughly coincide with the useful life of existing signs. Thus, it is likely that most of them would have been replaced anyway.
For more information, check out the Sign Retroreflectivity Toolkit.
Also, check out the FHWA Sign Visibility page.
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