Chapters: List of state highways in Washington, 1964 state highway renumbering, Washington State Route 9, Washington State Route 21, Washington State Route 529, Washington State Route 20, Washington State Route 530, Washington State Route 7, Washington State Route 531, Washington State Route 504, Washington State Route 904, Washington State Route 231, List of state highways in Snohomish County, Washington, Washington State Route 397, Washington State Route 6, Washington State Route 410, Washington State Route 99, Washington State Route 123, Washington State Route 109, Washington State Route 524, Washington State Route 26, Washington State Route 527, Washington State Route 510, Washington State Route 532, Washington State Route 92, Washington State Route 411, Washington State Route 409, Washington State Route 508, Washington State Route 507, Washington State Route 124, Washington State Route 538, Washington State Route 18, Washington State Route 528, Washington State Route 31, Washington State Route 520, Washington State Route 8, Washington State Route 203, Washington State Route 506, Washington State Route 125, Washington State Route 112, British Columbia Highway 15, Washington State Route 401, Washington State Route 106, Washington State Route 525, Washington State Route 113, Washington State Route 213, Washington State Route 16, Washington State Route 128, Washington State Route 129, Washington State Route 167, Washington State Route 108, Washington State Route 117, Washington State Route 706, Washington State Route 523, Washington State Route 204, Washington State Route 704, History of state highways in Washington, Washington State Route 339, Washington State Route 14, Washington State Route 522, Washington State Route 243, Washington State Route 131, Washington State Route 534, Washington State Route 100, Washington State Route 211, Washington State Route 539, Washington State Route 170, Washington State Route 823, Washington State Route 202, Washington St...