The '''''Manual on Uniform Traffic Control Devices'' (MUTCD)''' is a document issued by the [[Federal Highway Administration]] (FHWA) of the [[United States Department of Transportation]] (USDOT) to specify the standards by which [[Traffictraffic sign|traffic signs]]s, [[road]] markings (see [[lane]]), and [[traffic light|signals]] are designed, installed, and used. These specifications include the shapes, colors, and fonts used in road markings and signs. In the [[United States]], all traffic control devices must generally conform to these standards. The manual is used by state agencies as well as private construction firms to ensure that the traffic control devices they use conform to the national standard. While some state agencies have developed their own set of standards, these must be in substantial conformance with the MUTCD.
