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The California Manual on Uniform Traffic Control Devices (abbreviated CA MUTCD) is the standard for traffic signs, road surface markings, and traffic signals in the U.S. state of California. It is developed by the California Department of Transportation (Caltrans) Division of Safety Programs "in substantial conformance to" the national Manual ...
The Manual on Uniform Traffic Control Devices for Streets and Highways (usually referred to as the Manual on Uniform Traffic Control Devices, abbreviated 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 traffic signs, road surface markings, and signals are designed, installed ...
11th edition of the MUTCD, published December 2023. In the United States, road signs are, for the most part, standardized by federal regulations, most notably in the Manual on Uniform Traffic Control Devices (MUTCD) and its companion volume the Standard Highway Signs (SHS).
The intensive work on international road signs that took place between 1926 and 1949 eventually led to the development of the European road sign system. Both Britain and the United States developed their own road signage systems, both of which were adopted or modified by many other nations in their respective spheres of influence.
Signs in the MUTCD are often more text-oriented, though some signs do use pictograms as well. Canada and Australia have road signs based substantially on the MUTCD. In South America, Ireland, several Asian countries (Cambodia, Japan, Thailand, Malaysia and Indonesia) and New Zealand, road signage is influenced by both the Vienna Convention and ...
However, UN compliant signs must make use of more pictograms in contrast to more text based US variants. Indeed, most American nations make use of more symbols than allowed in the US MUTCD. Unlike in Europe, considerable variation within road sign designs can exist within nations, especially in multilingual areas.
Traffic warning signs with lights. Some warning signs have flashing lights to alert drivers of conditions ahead or remind drivers to slow down. In Britain, they are called warning lights. Flashing lights can be dangerous for people with certain forms of epilepsy and/or sensory processing disorder.
Traffic sign design. Traffic sign design involves any tasks in the process of designing traffic signage. Traffic signs may provide information about the law, warn about dangerous conditions and guide roadway users. Traffic signs vary depending upon their use, using different symbols, colors and shapes for easy identification.