signage system
communication system using signs as the primary means of informing
California Manual on Uniform Traffic Control Devices
manual published by the California Department of Transportation setting standards for the use of traffic signs, road surface markings, and signals in California
application of railway signals
overview about the application of railway signals
Ohio Manual of Uniform Traffic Control Devices
state highway manual to be discontinued
Manual on Uniform Traffic Control Devices
manual published by the Federal Highway Administration setting standards for the usage of traffic signs, road surface markings, and signals in the United States