Washington State Route 306

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
State highways in Washington Interstate US State Scenic Former PSH 1964 renumbering Former

State Route 30
Location:	Tonasket – east of Kettle Falls (-118.123 48.627)
Existed:	1970–1973

U.S. Route 95
Location:
Existed:	1970–1979

State Route 110
Location:
Existed:	1970–1975

State Route 111 Temporary
Location:
Existed:	1970–1971

State Route 113
Location:
Existed:	1970–1973

State Route 126
Location:
Existed:	1970–April 1, 1992

State Route 131
Location:
Existed:	1970–1975

State Route 140
Location:
Existed:	1970–April 1, 1992

State Route 143
Location:
Existed:	1973–1985

Since the 1964 state highway renumbering, which established the current state route system, the Washington State Department of Transportation has thirty state routes. Once a highway has been decommissioned, the highway is turned over to the local county or city that it resided in, who is 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.

State Route 111 was a state highway in the U.S. state of Washington, running from Hurricane Ridge in the Olympic National Park to US 101.

...
Wikipedia