The department and the parks and recreation commission may include, where appropriate, on any maps, or in any relevant descriptive material they may prepare at state expense, references to those portions of highways designated in RCW 47.39.020, and may include those designated byways by appropriate color or code designation.
RCW 47.39.060
Effective date-1999 c 218: See note following RCW 47.39.010.