Highway markers for State Route 30 and State Route 908 | |
| System information | |
|---|---|
| Notes | Defined by RCW 47.17.420 |
| Highway names | |
| Interstates | Interstate X (I-X) |
| US Highways | U.S. Route X (US X) |
| State | State Route X (SR x) |
| System links | |
Since the 1964 state highway renumbering, which established the current state route system, the Washington State Department of Transportation has decommissioned some state routes. Once a highway has been decommissioned, the highway is turned over to the local county or city that it is in, they are then responsible for all maintenance on the former highway. All former highways are codified in Washington law under the Revised Code of Washington, chapter 47.17, section 420.[citation needed]
Other highways during the transition between the 1964 renumbering and codification of the new system in 1970 are not listed here.