A map of U.S. states and territories color-coded by adoption of the 2009 edition of the Manual on Uniform Traffic Control Devices. Color-coding is based on this color scheme.
Legend:

  Adopted the 2009 MUTCD
  Adopted the 2009 MUTCD along with a state supplement
  Adopted a state MUTCD in conformance with the 2009 MUTCD
Own work based on:

MUTCDs &amp; Traffic Control Devices Information by State. Manual on Uniform Traffic Control Devices. Federal Highway Administration (July 14, 2020). Retrieved on January 11, 2021. [1]
List of Approved Requests for Interim Approval. Manual on Uniform Traffic Control Devices. Federal Highway Administration (May 15, 2020). Retrieved on January 11, 2021.
Minh Nguyen