The Manual on Uniform Traffic Control Devices (MUTCD) requires agencies to establish and implement a sign assessment or management method that will maintain minimum levels of sign retroreflectivity.

• MUTCD Language:
  This link takes you to the 11th Edition of the MUTCD. Information on sign retroreflectivity can be found in Section 2A.21 and 2A.22.

• MUTCD Final Rule - Federal Register Notice:
  Published on Dec. 21, 2007 and effective Jan. 22, 2008, this final rule provided background and detail explaining the requirements for maintaining sign retroreflectivity. This document describes how the final rule was developed through the rulemaking process for the MUTCD. Note that the compliance dates related to this rulemaking were revised in May 2012.

For information about traffic control devices and the Manual on Uniform Traffic Control Devices (MUTCD), other than visibility or retroreflectivity, please see FHWA's MUTCD website