Transportation. [2012-03-05]. (原始内容存档于2012-03-05). Staff. Arizona StateHighwaySystem Log (as of 12/31/2009) (PDF). Arizona Department of Transportation:
Highway Log. Southeastroads.com. October 31, 2002 [November 27, 2011]. (原始内容存档于2021-05-09). Florida Department of Transportation. GIS data. Florida Department
James B.(英语:James B. Norman); Dykman, Pieter T. (1989) [1986]. Historic Highway Bridges of Oregon (2nd ed.). Portland, Oregon: Oregon Historical Society