All states are required to follow the Manual on Uniform Traffic Control Devices when planning, designing and applying traffic control devices for all public highways, streets and bicycle trails, according to the U.S. Department of Transportation. Examples of traffic control devices include signals, pavement markings and signs.
Examples of properties required to follow the manual include privately owned properties that are open to public traffic, such as airports, shopping centers and sports arenas, explains the U.S. DOT. Exceptions to the requirement include private highway rail grade crossings and private gated properties with full-time access restrictions.
Local highway and state agencies are responsible for the selection, installation, operation and maintenance of publicly placed traffic control devices, advises the U.S. DOT. Traffic control devices placed on private property are the responsibility of the property owner, although exceptions apply.