Manual on Uniform Traffic Control Devices | WSDOT
The Manual on Uniform Traffic Control Devices (MUTCD) contains the standards for traffic control devices that regulate, warn, and guide road users along highways, county roads, and city streets. The MUTCD functions as both a legal and an engineering document. The Revised Code of Washington (RCW) 47.36, Traffic Control Devices, requires the WSDOT to adopt uniform standards for