Interstate 81 (English Wikipedia)

Rice, Otis K.; Brown, Stephen W. (1993). West Virginia: A History. Lexington: University Press of Kentucky. p. 10. ISBN 978-0-8131-1854-3. Retrieved February 2, 2018.
Bonnell, Robert O.; Bennett, Edgar T.; McMullen, John J. (December 15, 1958). Report of the State Roads Commission of Maryland (1957–1958 ed.). Baltimore: Maryland State Roads Commission. p. 82. Retrieved November 15, 2010.

books.google.com (Global: 3^rd place; English: 3^rd place)

Fiske, E.B.; Logue, R. (2006). The Fiske Guide to Colleges. New York: Times Books. p. 358. ISBN 9781402203749. Retrieved February 26, 2018 – via Google Books. The university straddles Interstate 81, an outlet to several major East Coast cities.
Harbaugh, Charles IV; Pennington, Jeff (2015). Middletown. Images of America. Charleston, SC: Arcadia Publishing. p. 10. ISBN 978-1-4671-2242-9. Retrieved February 26, 2018 – via Google Books.

collegiatetimes.com (Global: low place; English: low place)

Rossi, Isabella (February 12, 2019). "Sex trafficking closer to home than most Virginians would think". Collegiate Times. Retrieved June 22, 2020.

commons.wikimedia.org (Global: 484^th place; English: 698^th place)

Public Roads Administration (August 14, 1957). Official Route Numbering for the National System of Interstate and Defense Highways as Adopted by the American Association of State Highway Officials (Map). Washington, DC: Public Roads Administration. Archived from the original on July 19, 2017. Retrieved June 14, 2018 – via Wikimedia Commons.
Public Roads Administration (August 2, 1947). National System of Interstate Highways (Map). Scale not given. Washington, DC: Public Roads Administration. Retrieved September 4, 2010 – via Wikimedia Commons.
American Association of State Highway Officials (August 14, 1957). Official Route Numbering for the National System of Interstate and Defense Highways (Map). Scale not given. Washington, DC: American Association of State Highway Officials – via Wikimedia Commons.
American Association of State Highway Officials (June 27, 1958). Official Route Numbering for the National System of Interstate and Defense Highways as Adopted by the American Association of State Highway Officials (Map). Scale not given. Washington, DC: American Association of State Highway Officials. Retrieved February 7, 2018 – via Wikimedia Commons.

davidrumsey.com (Global: low place; English: 7,147^th place)

White, M. Wood (1873). "Counties of Morgan, Berkeley, Jefferson" (Map). White's Topographical, County & District Atlas of West Virginia. 1:310,000. M.W. White. p. 22. OCLC 62726043. Retrieved February 2, 2018 – via David Rumsey Map Collection.

dot.gov (Global: 1,620^th place; English: 841^st place)

fhwa.dot.gov

"Table 1: Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways". FHWA Route Log and Finder List. Federal Highway Administration. December 31, 2021. Retrieved July 14, 2022.
Natzke, Stefan; Neathery, Mike & Adderly, Kevin (June 20, 2012). "What is the National Highway System?". National Highway System. Washington, DC: Federal Highway Administration. Retrieved July 1, 2012.
Weingroff, Richard F. "Designating the Urban Interstates". Federal Highway Administration. Retrieved August 5, 2018.

highways.dot.gov

"Previous Interstate Facts of the Day". Eisenhower Interstate Highway System Home Page. See June 8, 2010. Archived from the original on April 26, 2006. Retrieved February 3, 2018.

en.wikisource.org (Global: 82^nd place; English: 41^st place)

Bureau of Public Roads (April 27, 1939). Toll Roads and Free Roads. Washington, DC: Government Printing Office. p. 109. OCLC 2843728. Retrieved February 29, 2024 – via Wikisource.

fultonhistory.com (Global: 4,085^th place; English: 2,034^th place)

"Penn-Can Road Vital to Broome, Majority at Hearing Says" (PDF). The Binghamton Press. January 9, 1957. p. 3. Archived from the original (PDF) on January 30, 2022. Retrieved February 3, 2018 – via Fulton County Historical Society.

greaternyroads.info (Global: low place; English: low place)

State of New York Department of Transportation (January 1, 1970). Official Description of Touring Routes in New York State (PDF) (Map). Albany: New York State Department of Transportation. Retrieved February 3, 2018.^{[full citation needed]}

hathitrust.org (Global: 296^th place; English: 153^rd place)

babel.hathitrust.org

Report of the State Highway Commissioner of Tennessee for the Biennium Ending June 30, 1960 (Report). Nashville: Tennessee Department of Highways. 1960. pp. 79, 81. Retrieved January 30, 2024 – via HathiTrust Digital Library.

i-81coalition.org (Global: low place; English: low place)

"Corridor Coalition". I-81coalition.org. Retrieved January 29, 2018.

maps.google.com (Global: 1,506^th place; English: 896^th place)

"Overview Map of I-81 in New York" (Map). Google Maps. April 16, 2012. Retrieved February 3, 2018.

maryland.gov (Global: 1,298^th place; English: 569^th place)

msa.maryland.gov

Maryland State Roads Commission (1958). Maryland: Official Highway Map (PDF) (Map). Baltimore: Maryland State Roads Commission.^{[full citation needed]}
Maryland State Roads Commission (1959). Maryland: Official Highway Map (PDF) (Map). Baltimore: Maryland State Roads Commission.^{[full citation needed]}

roads.maryland.gov

Highway Information Services Division (December 31, 2013). Highway Location Reference. Maryland State Highway Administration. Retrieved February 3, 2018.
- Washington County (PDF). pp. 13–19.

measuringworth.com (Global: 3,470^th place; English: 1,768^th place)

Johnston, Louis; Williamson, Samuel H. (2023). "What Was the U.S. GDP Then?". MeasuringWorth. Retrieved November 30, 2023. United States Gross Domestic Product deflator figures follow the MeasuringWorth series.

millershousemuseum.org (Global: low place; English: low place)

"Roads". Miller's House Museum. Retrieved July 16, 2018.^{[dead link]}

mountainx.com (Global: low place; English: low place)

Allen, Calvin (July 16, 2003). "The Political History of I-26". Mountain Xpress. Asheville, NC. Retrieved February 2, 2018.

newspapers.com (Global: 24^th place; English: 12^th place)

"I-81 Segment Will Be Opened Oct. 19". The Raleigh Register. Beckley, West Virginia. United Press International. October 6, 1966. p. 1 – via Newspapers.com.
"Randolph, Smith At I-81 Dedication". Charleston Daily Mail. Associated Press. October 19, 1966. p. 19. Retrieved December 23, 2025 – via Newspapers.com.
"Interstate 81 Open South Of Hagerstown". The Daily Times. Salisbury, Maryland. Associated Press. October 20, 1966. p. 2. Retrieved December 23, 2025 – via Newspapers.com.
"New Era Forecast for TC as Rocky Opens Route 81 Link". The Evening Press. Binghampton, New York. October 18, 1968. p. 5-A. Retrieved August 13, 2026 – via Newspapers.com.
"Traffic Moves On I-81 Section; Highway Officials Express Pleasure With Road Opening". The News-Messenger. Christiansburg, Virginia. December 22, 1971. pp. 1, 8. Retrieved February 14, 2026 – via Newspapers.com.
"Oldtimers Recall Opening Of Rt. 11". The News-Messenger. Christiansburg, Virginia. December 23, 1971. p. 9. Retrieved February 14, 2026 – via Newspapers.com.
"Interstate 81 Opens Near Christiansburg". The News. Lynchburg, Virginia. Associated Press. December 22, 1971. p. B-3. Retrieved February 14, 2026 – via Newspapers.com.
Samples, Henry (December 20, 1974). "Dunn opens interstate from Blountville to Greeneville". Johnson City Press-Chronicle. Johnson City, Tennessee. p. 1. Retrieved April 30, 2020 – via Newspapers.com.
"East Tennessee's Christmas Present". Kingsport Times-News. December 10, 1974. p. 11. Retrieved June 18, 2018 – via Newspapers.com.
"All four lanes of Interstate 81 to be opened today". Johnson City Press-Chronicle. August 27, 1975. p. 16. Retrieved December 8, 2019 – via Newspapers.com.
"After 18 Years, Interstate 81 Is Completed". The Scranton Times. September 12, 1975. p. 6. Retrieved August 13, 2026 – via Newspapers.com.
"I-81 Now Open". The Evening Sentinel. Carlisle, Pennsylvania. United Press International. September 11, 1975. p. 1. Retrieved August 13, 2026 – via Newspapers.com.
Beagle, Ben (July 13, 1987). "Interstates' union a happy one for Wythe". Roanoke Times & World-News. pp. A3, A5. Retrieved February 14, 2026 – via Newspapers.com.
Beagle, Ben (July 15, 1987). "Last links in I-81 and I-77 formally opened". Roanoke Times & World-News. p. B2. Retrieved February 14, 2026 – via Newspapers.com.

nvdaily.com (Global: low place; English: low place)

Zuckerman, Jake (January 26, 2017). "FBI forms human trafficking task force along I-81". North Virginia Daily. Retrieved June 22, 2020.

ny.gov (Global: 1,386^th place; English: 642^nd place)

dot.ny.gov

"I-81 Viaduct". New York State Department of Transportation. Archived from the original on April 17, 2021. Retrieved April 16, 2021.
Highway Data Services Bureau. "2014 Traffic Volume Report for New York State" (PDF). Albany: New York State Department of Transportation. Retrieved February 2, 2018.

rvarc.org (Global: low place; English: low place)

Truck Diversion from Interstate 81 to Rail (PDF) (Report). Roanoke, Virginia: Roanoke Valley-Alleghany Regional Commission. December 10, 2019. Retrieved August 13, 2026.

syracuse.com (Global: 2,571^st place; English: 1,244^th place)

Breiden, Michelle (July 10, 2023). "New York starts $2.25 billion Interstate 81 rebuild despite court challenges". The Post-Standard. Syracuse, New York. Retrieved July 17, 2023.

truckinginfo.com (Global: low place; English: low place)

"Corridor Coalition Meets to Plot the Future of Interstate 81". Heavy Duty Trucking. Torrance, California: Bobit Business Media Inc. November 29, 2010. Retrieved August 13, 2026.

virginiadot.org (Global: 3,250^th place; English: 1,412^th place)

"I-81 History". Virginia Department of Transportation. Archived from the original on November 13, 2007. Retrieved January 29, 2018.
Virginia Department of Transportation. "Virginia Interstate Exits". Virginia Department of Transportation. Retrieved February 3, 2018.
Virginia Department of Transportation (2013). "2012 Virginia Department of Transportation Daily Traffic Volume Estimates Including Vehicle Classification Estimates" (PDF). Virginia Department of Transportation.

vt.edu (Global: 2,818^th place; English: 1,692^nd place)

scholar.lib.vt.edu

Kennedy, Joe (September 9, 1996). "I-81: Is It Ruled By Big Rigs?". The Roanoke Times. p. C-1. Retrieved August 13, 2026 – via Virginia Tech University Libraries.

web.archive.org (Global: 1^st place; English: 1^st place)

Public Roads Administration (August 14, 1957). Official Route Numbering for the National System of Interstate and Defense Highways as Adopted by the American Association of State Highway Officials (Map). Washington, DC: Public Roads Administration. Archived from the original on July 19, 2017. Retrieved June 14, 2018 – via Wikimedia Commons.
"Previous Interstate Facts of the Day". Eisenhower Interstate Highway System Home Page. See June 8, 2010. Archived from the original on April 26, 2006. Retrieved February 3, 2018.
"Penn-Can Road Vital to Broome, Majority at Hearing Says" (PDF). The Binghamton Press. January 9, 1957. p. 3. Archived from the original (PDF) on January 30, 2022. Retrieved February 3, 2018 – via Fulton County Historical Society.
"I-81 History". Virginia Department of Transportation. Archived from the original on November 13, 2007. Retrieved January 29, 2018.
"I-81 Viaduct". New York State Department of Transportation. Archived from the original on April 17, 2021. Retrieved April 16, 2021.

whptv.com (Global: low place; English: low place)

"I-81 Safety Conference". Harrisburg, PA: WHP-TV. Retrieved October 4, 2014.^{[permanent dead link]}

witf.org (Global: low place; English: low place)

I-81 Corridor group^{[dead link]}

worldcat.org (Global: 4^th place; English: 4^th place)

search.worldcat.org

Perrier, Dianne (2010). Interstate 81: The Great Warriors Trace. Gainesville: University Press of Florida. ISBN 978-0-8130-3481-2. OCLC 502304332.^{[page needed]}
White, M. Wood (1873). "Counties of Morgan, Berkeley, Jefferson" (Map). White's Topographical, County & District Atlas of West Virginia. 1:310,000. M.W. White. p. 22. OCLC 62726043. Retrieved February 2, 2018 – via David Rumsey Map Collection.
Bureau of Public Roads (April 27, 1939). Toll Roads and Free Roads. Washington, DC: Government Printing Office. p. 109. OCLC 2843728. Retrieved February 29, 2024 – via Wikisource.

wsls.com (Global: low place; English: low place)

Coleman, Abbie (August 13, 2025). "Virginia Freight Rail Cuts Highway Truck Traffic by Millions". WSLS-TV. Roanoke, Virginia. Retrieved August 13, 2026.
Zibton, Jenna (June 14, 2023). "Interstate 81 improvements set to make the road safer, less congested". WSLS-TV. Roanoke, Virginia. Retrieved August 13, 2026.

ynn.com (Global: low place; English: low place)

watertown.ynn.com

"Fort Drum connector road officially open". Syracuse, NY: YNN Central New York. December 6, 2012. Retrieved February 2, 2018.{{cite news}}: CS1 maint: deprecated archival service (link)

Interstate 81 (English Wikipedia)

archive.org (Global: 6th place; English: 6th place)

books.google.com (Global: 3rd place; English: 3rd place)

collegiatetimes.com (Global: low place; English: low place)

commons.wikimedia.org (Global: 484th place; English: 698th place)

davidrumsey.com (Global: low place; English: 7,147th place)

dot.gov (Global: 1,620th place; English: 841st place)

fhwa.dot.gov

highways.dot.gov

en.wikisource.org (Global: 82nd place; English: 41st place)

fultonhistory.com (Global: 4,085th place; English: 2,034th place)

greaternyroads.info (Global: low place; English: low place)

hathitrust.org (Global: 296th place; English: 153rd place)

babel.hathitrust.org

i-81coalition.org (Global: low place; English: low place)

maps.google.com (Global: 1,506th place; English: 896th place)

maryland.gov (Global: 1,298th place; English: 569th place)

msa.maryland.gov

roads.maryland.gov

measuringworth.com (Global: 3,470th place; English: 1,768th place)

millershousemuseum.org (Global: low place; English: low place)

mountainx.com (Global: low place; English: low place)

newspapers.com (Global: 24th place; English: 12th place)

nvdaily.com (Global: low place; English: low place)

ny.gov (Global: 1,386th place; English: 642nd place)

dot.ny.gov

rvarc.org (Global: low place; English: low place)

syracuse.com (Global: 2,571st place; English: 1,244th place)

truckinginfo.com (Global: low place; English: low place)

virginiadot.org (Global: 3,250th place; English: 1,412th place)

vt.edu (Global: 2,818th place; English: 1,692nd place)

scholar.lib.vt.edu

web.archive.org (Global: 1st place; English: 1st place)

whptv.com (Global: low place; English: low place)

witf.org (Global: low place; English: low place)

worldcat.org (Global: 4th place; English: 4th place)

search.worldcat.org

wsls.com (Global: low place; English: low place)

ynn.com (Global: low place; English: low place)

watertown.ynn.com

archive.org (Global: 6^th place; English: 6^th place)

books.google.com (Global: 3^rd place; English: 3^rd place)

commons.wikimedia.org (Global: 484^th place; English: 698^th place)

davidrumsey.com (Global: low place; English: 7,147^th place)

dot.gov (Global: 1,620^th place; English: 841^st place)

en.wikisource.org (Global: 82^nd place; English: 41^st place)

fultonhistory.com (Global: 4,085^th place; English: 2,034^th place)

hathitrust.org (Global: 296^th place; English: 153^rd place)

maps.google.com (Global: 1,506^th place; English: 896^th place)

maryland.gov (Global: 1,298^th place; English: 569^th place)

measuringworth.com (Global: 3,470^th place; English: 1,768^th place)

newspapers.com (Global: 24^th place; English: 12^th place)

ny.gov (Global: 1,386^th place; English: 642^nd place)

syracuse.com (Global: 2,571^st place; English: 1,244^th place)

virginiadot.org (Global: 3,250^th place; English: 1,412^th place)

vt.edu (Global: 2,818^th place; English: 1,692^nd place)

web.archive.org (Global: 1^st place; English: 1^st place)

worldcat.org (Global: 4^th place; English: 4^th place)