Federal Highway Administration (September 30, 2020). National Highway System: Kentucky(PDF) (Map). Scale not given. Washington, DC: Federal Highway Administration. Retrieved December 16, 2022.
epa.gov
gaftp.epa.gov
Woods, A.J.; Omernik, J.M.; Martin, W.H.; Pond, G.J.; Andrews, W.M.; Call, S.M.; Comstock, J.A.; Taylor, D.D. (2002). "Ecoregions of Kentucky"(PDF) (Color poster with map, descriptive text, summary tables, and photographs). Reston, Virginia: United States Geological Survey. Retrieved December 5, 2022 – via Environmental Protection Agency.
Department of Planning. "Official DMI Route Log"(PDF). Frankfort: Kentucky Transportation Cabinet. Retrieved November 23, 2022.
transportation.ky.gov
Department of Planning (June 2022). State Primary Road System: Knox County(PDF) (Map). Frankfort: Kentucky Transportation Cabinet. Retrieved November 23, 2022.
Department of Planning (June 2022). State Primary Road System: Clay County(PDF) (Map). Frankfort: Kentucky Transportation Cabinet. Retrieved November 23, 2022.
Department of Planning (June 2022). State Primary Road System: Owsley County(PDF) (Map). Frankfort: Kentucky Transportation Cabinet. Retrieved November 23, 2022.
Department of Planning (June 2022). State Primary Road System: Lee County(PDF) (Map). Frankfort: Kentucky Transportation Cabinet. Retrieved November 23, 2022.
Department of Planning (June 2022). State Primary Road System: Wolfe County(PDF) (Map). Frankfort: Kentucky Transportation Cabinet. Retrieved November 23, 2022.
Department of Planning (June 2022). State Primary Road System: Powell County(PDF) (Map). Frankfort: Kentucky Transportation Cabinet. Retrieved November 23, 2022.
Department of Planning (June 2022). State Primary Road System: Bath County(PDF) (Map). Frankfort: Kentucky Transportation Cabinet. Retrieved November 23, 2022.
Department of Planning (June 2022). State Primary Road System: Mason County(PDF) (Map). Frankfort: Kentucky Transportation Cabinet. Retrieved November 23, 2022.