Interstate Highway System (English Wikipedia)

Watson, Bruce (July–August 2020). "Ike's Excellent Adventure". American Heritage. Vol. 65, no. 4. Archived from the original on July 9, 2020. Retrieved July 9, 2020.

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Mikkelson, Barbara (April 1, 2011). "Interstate Highways as Airstrips". Snopes. Archived from the original on December 1, 2005. Retrieved March 15, 2017.

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Wolshon, Brian (August 2001). ""One-Way-Out": Contraflow Freeway Operation for Hurricane Evacuation" (PDF). Natural Hazards Review. Vol. 2, no. 3. pp. 105–112. doi:10.1061/(ASCE)1527-6988(2001)2:3(105). Archived from the original (PDF) on October 6, 2008. Retrieved January 10, 2008.

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Mehren, E.J. (December 19, 1918). "A Suggested National Highway Policy and Plan". Engineering News-Record. Vol. 81, no. 25. pp. 1112–1117. ISSN 0891-9526. Retrieved August 17, 2015 – via Google Books.
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Essex, Allen (May 2013). "State Adds I-69 to Interstate System". The Brownsville Herald. Archived from the original on February 27, 2017. Retrieved July 17, 2013.

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California Department of Transportation (n.d.). "Timeline of Notable Events of the Interstate Highway System in California". California Department of Transportation. Archived from the original on March 6, 2014. Retrieved March 2, 2014.

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Faigin, Daniel P. (December 29, 2015). "Numbering Conventions: Post Miles". California Highways. Archived from the original on January 31, 2017. Retrieved March 15, 2017.^{[self-published source]}

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Shirley, Chad (2023). Testimony on the Status of the Highway Trust Fund: 2023 Update (Report). Congressional Budget Office. Archived from the original on March 30, 2024. Retrieved March 30, 2024.

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money.cnn.com

Fox, Justin (January 26, 2004). "The Great Paving: How the Interstate Highway System Helped Create the Modern Economy—and Reshaped the Fortune 500". Fortune. Archived from the original on June 1, 2018. Retrieved May 10, 2019.

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Hart, Ariel (July 19, 2007). "1st Toll Project Proposed for I-20 East: Plan Would Add Lanes Outside I-285" (PDF). The Atlanta Journal-Constitution. ISSN 1539-7459. Archived from the original (PDF) on October 25, 2007. Retrieved September 27, 2007.

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23 U.S.C. § 103(c), Interstate System.

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Walker, Alissa (2022). "About Time: Syracuse's I-81 Is Finally Being Demolished". Curbed. Archived from the original on March 29, 2024. Retrieved March 29, 2024.

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Petroski, Henry (2006). "On the Road". American Scientist. Vol. 94, no. 5. pp. 396–369. doi:10.1511/2006.61.396. ISSN 0003-0996.
Wolshon, Brian (August 2001). ""One-Way-Out": Contraflow Freeway Operation for Hurricane Evacuation" (PDF). Natural Hazards Review. Vol. 2, no. 3. pp. 105–112. doi:10.1061/(ASCE)1527-6988(2001)2:3(105). Archived from the original (PDF) on October 6, 2008. Retrieved January 10, 2008.
Mahajan, Avichal (June 26, 2023). "Highways and segregation". Journal of Urban Economics. 141 103574. doi:10.1016/j.jue.2023.103574. S2CID 259681981.

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fhwa.dot.gov

Office of Highway Policy Information (January 12, 2024). Table HM-20: Public Road Length, 2022, Miles By Functional System (Report). Federal Highway Administration. Retrieved August 14, 2024.
Office of Highway Policy Information (February 5, 2024). Table VM-1: Annual Vehicle Distance Traveled in Miles and Related Data, 2022, by Highway Category and Vehicle Type (Report). Federal Highway Administration. Retrieved August 14, 2024.
Weingroff, Richard (October 15, 2013). "'Clearly Vicious as a Matter of Policy': The Fight Against Federal-Aid". Federal Highway Administration. Archived from the original on September 24, 2015. Retrieved August 17, 2015.
"America Celebrates 30th Anniversary of the Interstate System". US Highways. Fall 1986. Archived from the original on October 24, 2011. Retrieved March 10, 2012.
Federal Highway Administration (n.d.). "Why Does The Interstate System Include Toll Facilities?". Federal Highway Administration. Archived from the original on May 18, 2013. Retrieved July 15, 2009.
Weingroff, Richard F. (January 18, 2005). "Was I-76 Numbered to Honor Philadelphia for Independence Day, 1776?". Ask the Rambler. Federal Highway Administration. Archived from the original on July 3, 2013. Retrieved January 17, 2008.
Federal Highway Administration (March 22, 2007). "FHWA Route Log and Finder List". Federal Highway Administration. Archived from the original on June 5, 2013. Retrieved January 23, 2008.
DeSimone, Tony (March 22, 2007). "FHWA Route Log and Finder List: Additional Designations". Federal Highway Administration. Archived from the original on August 5, 2014. Retrieved January 4, 2010.
Weingroff, Richard M. (April 7, 2011). "When did the Federal Government begin collecting the gas tax?". Ask the Rambler. Federal Highway Administration. Archived from the original on July 3, 2013. Retrieved June 29, 2011.
Federal Highway Administration (January 3, 2012). "Funding For Highways and Disposition of Highway-User Revenues, All Units of Government, 2007". Highway Statistics 2007. Federal Highway Administration. Archived from the original on January 17, 2013. Retrieved March 10, 2012.
Weiss, Martin H. (April 7, 2011). "How Many Interstate Programs Were There?". Highway History. Federal Highway Administration. Archived from the original on June 7, 2013. Retrieved March 10, 2012.
Weingroff, Richard F. (August 2, 2011). "Why Does The Interstate System Include Toll Facilities?". Ask the Rambler. Federal Highway Administration. Archived from the original on May 18, 2013. Retrieved March 10, 2012.
Obenberger, Jon & DeSimone, Tony (April 7, 2011). "Interstate System Facts". Route Log and Finder List. Federal Highway Administration. Archived from the original on July 13, 2013. Retrieved February 22, 2012.
Federal Highway Administration (April 6, 2011). "Miscellaneous Interstate System Facts". Federal Highway Administration. Archived from the original on August 5, 2014. Retrieved February 22, 2012.
"FHWA Route Log and Finder List". Federal Highway Administration. January 31, 2018. Archived from the original on July 11, 2018. Retrieved August 25, 2018.
Adderly, Kevin (December 31, 2016). "Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2016". Route Log and Finder List. Federal Highway Administration. Archived from the original on February 13, 2023. Retrieved September 24, 2017.
Price, Jeff (May 6, 2019). "Table 1: Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways as of December 31, 2018". Route Log and Finder List. Federal Highway Administration. Archived from the original on April 22, 2012. Retrieved June 21, 2021.
"Table 3: Interstate Routes in Each of the 50 States, District of Columbia, and Puerto Rico". Route Log and Finder List. Federal Highway Administration. Archived from the original on July 11, 2018. Retrieved August 25, 2018.

highways.dot.gov

Weingroff, Richard F. (Summer 1996). "Federal-Aid Highway Act of 1956, Creating the Interstate System". Public Roads. Vol. 60, no. 1. ISSN 0033-3735. Archived from the original on March 7, 2012. Retrieved March 16, 2012.
Weingroff, Richard F. (Summer 1996). "Three States Claim First Interstate Highway". Public Roads. Vol. 60, no. 1. ISSN 0033-3735. Archived from the original on October 11, 2010. Retrieved February 16, 2008.
Weingroff, Richard F. (January 2006). "The Year of the Interstate". Public Roads. Vol. 69, no. 4. ISSN 0033-3735. Archived from the original on January 4, 2012. Retrieved March 10, 2012.
Slater, Rodney E. (Spring 1996). "The National Highway System: A Commitment to America's Future". Public Roads. Vol. 59, no. 4. ISSN 0033-3735. Archived from the original on December 16, 2014. Retrieved January 10, 2008.
Weingroff, Richard F. (May–June 2000). "One Mile in Five: Debunking the Myth". Public Roads. Vol. 63, no. 6. ISSN 0033-3735. Archived from the original on December 12, 2010. Retrieved December 14, 2010.
Federal Highway Administration (June 30, 2023). "Interstate Highway System: The Myths". Federal Highway Administration. Archived from the original on April 29, 2024. Retrieved June 24, 2024.
Federal Highway Administration (n.d.). "Interstate FAQ". Federal Highway Administration. Archived from the original on May 7, 2013. Retrieved June 26, 2009. Proposed I-41 in Wisconsin and partly completed I-74 in North Carolina respectively are possible and current exceptions not adhering to the guideline. It is not known if the US Highways with the same numbers will be retained in the states upon completion of the Interstate routes.
Federal Highway Administration (n.d.). "Interstate FAQ: Who owns it?". Federal Highway Administration. Archived from the original on May 7, 2013. Retrieved March 4, 2009.

mutcd.fhwa.dot.gov

Federal Highway Administration (November 16, 2011). "Interim Releases for New and Revised Signs". Standard Highway Signs and Markings. Federal Highway Administration. Archived from the original on March 18, 2012. Retrieved March 10, 2012.
Federal Highway Administration (May 10, 2005) [2004]. "Guide Signs" (PDF). Standard Highway Signs (2004 English ed.). Washington, DC: Federal Highway Administration. pp. 3-1 to 3-3. OCLC 69678912. Archived (PDF) from the original on February 5, 2012. Retrieved February 22, 2012.
Federal Highway Administration (December 2009). "Chapter 2D. Guide Signs: Conventional Roads" (PDF). Manual on Uniform Traffic Control Devices (2009 ed.). Washington, DC: Federal Highway Administration. p. 142. OCLC 496147812. Archived (PDF) from the original on March 15, 2012. Retrieved February 22, 2012.

crashstats.nhtsa.dot.gov

National Center for Statistics and Analysis (May 2024). Early Estimates of Motor Vehicle Traffic Fatalities and Fatality Rate by Sub-Categories in 2023 (Report). National Highway Traffic Safety Administration. DOT HS 813 581. Retrieved August 14, 2024.

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Davis, Jeff (July 11, 2025). "Federal Prohibitions on Toll Roads, How They Got There, and How the GROW AMERICA Act Proposes to Change Them". The Eno Center for Transportation. Retrieved July 15, 2025.

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Zhang, Sarah (October 7, 2014). "An Arizona Highway Has Used the Metric System Since the 80s". Gizmodo. Archived from the original on February 25, 2019. Retrieved February 25, 2019.

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itd.idaho.gov

Idaho Transportation Department (May 31, 2006). "Celebrating 50 years of Idaho's Interstates". Idaho Transportation Department. Archived from the original on February 24, 2012. Retrieved March 10, 2012.

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Indiana Department of Transportation (n.d.). "Understanding Interstate Route Numbering, Mile Markers & Exit Numbering". Indiana Department of Transportation. Archived from the original on May 15, 2013. Retrieved November 26, 2011.

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American Association of State Highway and Transportation Officials (2006). "Image Gallery". The Interstate is 50. American Association of State Highway and Transportation Officials. Archived from the original on February 25, 2012. Retrieved February 22, 2012.
American Association of State Highway and Transportation Officials (n.d.). "Interstate Highway Fact Sheet" (PDF). American Association of State Highway and Transportation Officials. Archived from the original (PDF) on October 10, 2008. Retrieved February 22, 2012.

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Sherrill, Cassandra (September 28, 2019). "Facts and History of North Carolina Interstates". Winston-Salem Journal. Archived from the original on September 29, 2019. Retrieved September 29, 2019.

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Blas, Elisheva (November 2010). "The Dwight D. Eisenhower National System of Interstate and Defense Highways: The Road to Success?" (PDF). The History Teacher. Vol. 44, no. 1. Long Beach, California: Society for History Education. pp. 127–142. ISSN 0018-2745. JSTOR 25799401. Archived (PDF) from the original on April 2, 2017. Retrieved April 27, 2017.

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Shirley, Chad (2023). Testimony on the Status of the Highway Trust Fund: 2023 Update (Report). Congressional Budget Office. Archived from the original on March 30, 2024. Retrieved March 30, 2024.
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Weingroff, Richard F. (Summer 1996). "The Federal-State Partnership at Work: The Concept Man". Public Roads. Vol. 60, no. 1. ISSN 0033-3735. Archived from the original on May 28, 2010. Retrieved March 16, 2012.
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westernite.org (Global: low place; English: low place)

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

en.wikipedia.org

As of 2022^[update].^[2]

worldcat.org (Global: 5^th place; English: 5^th place)

search.worldcat.org

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worldcat.org

Michigan Department of Transportation (2011). Pure Michigan: State Transportation Map (Map). c. 1:221,760. Lansing: Michigan Department of Transportation. Lansing inset. OCLC 42778335, 786008212.

Interstate Highway System (English Wikipedia)

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state.ga.us (Global: low place; English: 8,999^th place)

state.mn.us (Global: 3,210^th place; English: 1,795^th place)

state.nm.us (Global: low place; English: 5,844^th place)

state.tx.us (Global: 1,858^th place; English: 1,014^th place)

tamu.edu (Global: 1,672^nd place; English: 1,262^nd place)

theconversation.com (Global: 928^th place; English: 651^st place)

theguardian.com (Global: 12^th place; English: 11^th place)

usatoday.com (Global: 41^st place; English: 34^th place)

uslaw.link (Global: low place; English: 6,260^th place)

uspto.gov (Global: 1,459^th place; English: 991^st place)

virginia.edu (Global: 1,041^st place; English: 733^rd place)

vox.com (Global: 484^th place; English: 323^rd place)

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

worldcat.org (Global: 5^th place; English: 5^th place)