520号华盛顿州州道State route No. 520. Revised Code of Washington . Washington State Legislature. 1970 [2017-07-17]. (原始内容存档于2016-03-04). Template:WSDOT State Highway Log
27号华盛顿州州道 Washington. Washington State Legislature. 1970; revised 1975, 1979, 1991 [February 15, 2013]. (原始内容存档于2012-02-04). 请检查|date=中的日期值 (帮助) Staff. State Highway Log:
99号华盛顿州州道99号华盛顿州州道(英語:Washington State Route 99,SR 99,也称为 太平洋公路,Pacific Highway )是一条位于美国华盛顿州西雅图大都会区的华盛顿州州道。它全长49英里(79公里),南起华盛顿州法伊夫,北至埃弗里特,穿过的城市有费德勒尔韦、西塔科、西雅圖、岸線市和林伍德。SR
5号州际公路华盛顿州段and Defense Highways as of October 31, 2002 (页面存档备份,存于互联网档案馆) Washington State Department of Transportation, State Highway Log (页面存档备份,存于互联网档案馆), 2006
513号华盛顿州州道(原始内容存档于2012-02-04). 请检查|date=中的日期值 (帮助) Staff. State Highway Log: Planning Report 2012, SR 2 to SR 971 (PDF). Washington State Department of Transportation: 1576–1579