![]() In 2003, the Federal Highway Administration published research recommendations for minimum maintained retroreflectivity levels for traffic signs. In 1992, the Congress directed the Secretary of Transportation to revise the Manual on Uniform Traffic Control Devices to include a standard for minimum levels of retroreflectivity that must be maintained for traffic signs. Replaced Table 17 with corrected version. The following table shows the modifications that were made to this report.Ĭhanged caption from: “Luminance requirements for white-on-blue sign legends (cd/m 2).” to “Luminance requirements for white-on-brown sign legends (cd/m 2).” PDF files can be viewed with the Acrobat® Reader®Īs of July 2011, this online document was modified in the following ways:Ī technical correction and editorial correction were made to this report after the report was originally published. HTML Version of Errata for FHWA-HRT-08-029 ![]()
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