2009 Manual on Uniform Traffic Control Devices

The traffic control devices (TCD) are critical for the safe and efficient transportation of people and goods. The 2009 Manual on Uniform Traffic Control Devices (MUTCD), by setting minimum standards and providing guidance, ensures uniformity of traffic control devices across the nation. The use of uniform TCDs (messages, location, size, shapes, and colors) helps reduce crashes and congestion, and improves the efficiency of the surface transportation system. Uniformity also helps reduce the cost of TCDs through standardization.

May 2012 MUTCD Revisions: Manual on Uniform Traffic Control Devices (MUTCD)