in the 1978 MUTCD. The 2000 and 2003 MUTCDs each eliminated a symbol sign that had long been intended to replace a word message sign: "Pavement Ends" (in 2000) and "Narrow Bridge" (in 2003). On January 2, 2008, FHWA published a Notice of Proposed Amendment in the Federal Register containing a proposal for a new edition of the MUTCD, and published the draft content of this new edition on the MUTCD website for public review and comment. Comments were accepted until the end of July 2008. The new edition was published in 2009. Revisions to the 2009 edition were then published in 2012. On December 14, 2020, FHWA published a Notice of Proposed Amendment in the Federal Register containing a proposal for an eleventh edition of the MUTCD, publishing the draft content of this new edition online for public review and comment until March 15, 2021. Development Proposed additions and revisions to the MUTCD are recommended to FHWA by the National Committee on Uniform Traffic Control Devices (NCUTCD), a private, non-profit organization. The NCUTCD also recommends interpretations of the MUTCD to other agencies that use the MUTCD, such as state departments of transportation. NCUTCD develops public and professional awareness of the principles of safe traffic control devices and practices and provides a forum for qualified individuals to exchange professional information. The NCUTCD is supported by twenty-one sponsoring organizations, including transportation and engineering industry groups (such as AASHTO and ASCE), safety organizations (such as the National Safety Council and Advocates for Highway and Auto Safety), and the American Automobile Association. Each sponsoring organization promotes members to serve as voting delegates within the NCUTCD. Adoption Eighteen states have adopted the national MUTCD as is. Twenty-two states, the District of Columbia, Puerto Rico, and the United States Department of Defense through the Military Surface Deployment and Distribution Command (SDDC) have all adopted supplements to the MUTCD. Ten states have adopted their own editions of the MUTCD "in substantial conformance to" an edition of the national MUTCD, annotated throughout with state-specific modifications and clarifications. The Guam Department of Public Works has also adopted the MUTCD in some form. The following state-specific MUTCD editions are currently in effect: California Department of Transportation: California Manual on Uniform Traffic Control Devices (CA MUTCD) Delaware Department of Transportation: Delaware Manual on Uniform Traffic Control Devices (DE MUTCD) Indiana Department of Transportation: Indiana Manual on Uniform Traffic Control Devices