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.

archive-it.org

wayback.archive-it.org

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

asce.org

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.

books.google.com

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.
Schulten, Susan (2018). A History of America in 100 Maps. University of Chicago Press. p. 229. ISBN 978-0-226-45861-8.

brownsvilleherald.com

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.

ca.gov

dot.ca.gov

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.

cahighways.org

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]}

cbo.gov

Shirley, Chad (2023). Testimony on the Status of the Highway Trust Fund: 2023 Update (Report). Congressional Budget Office.

cnn.com

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.

cobbrides.com

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.

cornell.edu

law.cornell.edu

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

curbed.com

Walker, Alissa (2022). "About Time: Syracuse's I-81 Is Finally Being Demolished". Curbed.

doi.org

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.

dot.gov

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. 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.

floridaits.com

Faquir, Tahira (March 30, 2006). "Contraflow Implementation Experiences in the Southern Coastal States" (PDF). Florida Department of Transportation. Archived from the original (PDF) on October 25, 2007. Retrieved September 27, 2007.

gizmodo.com

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.

history.com

"The Interstate Highway System". History. A&E Television Networks. Archived from the original on May 10, 2019. Retrieved May 10, 2019.

idaho.gov

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.

in.gov

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.

interstate50th.org

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.

journalnow.com

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.

jstor.org

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.

kcrw.com

Chiotakis, Steve (June 30, 2020). "How freeways represent the racial divide in LA". KCRW.

latimes.com

Fausset, Richard (November 13, 2001). "Highway Numerology Muddled by Potholes in Logic". Los Angeles Times. p. B2. Archived from the original on April 2, 2009. Retrieved September 8, 2018.
Curtiss, Aaron (April 19, 1996). "The Freeway Numbers Game". Los Angeles Times. ISSN 0458-3035. Retrieved August 31, 2017.

levittownnow.com

Sofield, Tom (September 22, 2018). "Decades in the Making, I-95, Turnpike Connector Opens to Motorists". Levittown Now. Archived from the original on April 6, 2020. Retrieved September 22, 2018.

mass.gov

Massachusetts Department of Transportation (n.d.). "Massachusetts Department of Transportation completed projects". Massachusetts Department of Transportation. Retrieved September 20, 2022.

measuringworth.com

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.

mit.edu

Carr, John (October 11, 2007). "State traffic and speed laws". Massachusetts Institute of Technology. Archived from the original on August 7, 2013. Retrieved January 10, 2008.

modot.org

Missouri Department of Transportation (n.d.). "Converting US Route 71 to I-49". Interstate I-49 Expansion Corridor in Southwest District of Missouri. Missouri Department of Transportation. Archived from the original on January 17, 2013.

nallresearch.com

Nall, Clayton; O'Keeffe, Zachary P. (2018). "What Did Interstate Highways Do to Urban Neighborhoods?" (PDF). Nall Research. p. 30. Archived (PDF) from the original on April 3, 2021. Retrieved March 17, 2022.

nbcnews.com

Gamboa, Suzanne; McCausland, Phil; Lederman, Josh; Popken, Ben (June 18, 2021). "Bulldozed and bisected: Highway construction built a legacy of inequality". NBC News. Retrieved June 18, 2023.

nebraskatransportation.org

Nebraska Department of Roads (n.d.). "I-80 50th Anniversary Page". Nebraska Department of Roads. Archived from the original on December 21, 2013. Retrieved August 23, 2009.

news.google.com

Tuna, Gary (July 27, 1989). "Dawida seeks to merge I-70, turnpike at Breezewood". Pittsburgh Post-Gazette. Archived from the original on September 30, 2015. Retrieved November 19, 2015 – via Google News.

newspapers.com

Devlin, Sherry (September 8, 1991). "No Stopping Now". The Missoulian. p. E1. Retrieved September 12, 2023 – via Newspapers.com.
Free, Cathy (September 15, 1991). "Engineer pleased with his Wallace freeway 'work of art'". The Spokesman-Review. p. B3. Retrieved September 12, 2023 – via Newspapers.com.

ny.gov

dot.ny.gov

New York State Department of Transportation (n.d.). "Is New York State planning to change its Interstate exit numbering system from a sequential system to a distance-based milepost system?". New York State Department of Transportation. Archived from the original on March 22, 2019. Retrieved January 1, 2003.

nytimes.com

"Around the Nation: Transcontinental Road Completed in Utah". The New York Times. August 25, 1986. Archived from the original on March 16, 2017. Retrieved February 9, 2017.
Zarroli, Jim (2023). "Why It's So Hard to Tear Down a Crumbling Highway Nearly Everyone Hates". New York Times.
Kruse, Kevin M. (August 14, 2019). "How Segregation Caused Your Traffic Jam". The New York Times. ISSN 0362-4331.

select.nytimes.com

"Nixon Approves Limit of 55 M.P.H." The New York Times. January 3, 1974. pp. 1, 24. Archived from the original on June 5, 2011. Retrieved July 27, 2008.

paturnpikei95.com

Pennsylvania Turnpike Commission (n.d.). "Draft: Design Advisory Committee Meeting No. 2" (PDF). I-95/I-276 Interchange Project Meeting Design Management Summary. Pennsylvania Turnpike Commission. Archived from the original (PDF) on October 2, 2013. Retrieved May 11, 2008.

pressherald.com

Koenig, Paul (May 27, 2014). "Speed Limit on Much of I-295 Rises to 70 MPH". Portland Press Herald. Archived from the original on July 27, 2014. Retrieved July 22, 2014.

publicpurpose.com

Cox, Wendell; Jean, Love (June 1996). 40 Years of the US Interstate Highway System: An Analysis The Best Investment A Nation Ever Made. American Highway Users Alliance. Retrieved November 21, 2022 – via Public Purpose.

richmondfed.org

Phelps, Haley (2021). "When Interstates Paved the Way". Federal Reserve Bank of Richmond. Archived from the original on March 7, 2023. Retrieved May 17, 2024.

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semanticscholar.org

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Mahajan, Avichal (June 26, 2023). "Highways and segregation". Journal of Urban Economics. 141: 103574. doi:10.1016/j.jue.2023.103574. S2CID 259681981.

si.edu

americanhistory.si.edu

"American Railroads". National Museum of American History. July 20, 2017. Retrieved October 2, 2023.

slate.com

Laskow, Sarah (August 24, 2015). "Eisenhower and History's Worst Cross-Country Road Trip". Slate. Retrieved June 24, 2024.

snopes.com

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

societyforhistoryeducation.org

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.

state.co.us

dot.state.co.us

Colorado Department of Transportation (n.d.). "CDOT Fun Facts". Colorado Department of Transportation. Archived from the original on January 16, 2008. Retrieved February 15, 2008.

state.ga.us

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VanMeter, Darryl D. (October 28, 2005). "Future of HOV in Atlanta" (PDF). American Society of Highway Engineers. Archived from the original (PDF) on October 25, 2007. Retrieved September 27, 2007.

state.mn.us

dot.state.mn.us

Minnesota Department of Transportation (2006). "Mn/DOT Celebrates Interstate Highway System's 50th Anniversary". Minnesota Department of Transportation. Archived from the original on December 4, 2007. Retrieved January 17, 2008.

state.nm.us

nmshtd.state.nm.us

New Mexico State Highway and Transportation Department (2007). State of New Mexico Memorial Designations and Dedications of Highways, Structures and Buildings (PDF). Santa Fe: New Mexico State Highway and Transportation Department. p. 14. Archived from the original (PDF) on July 16, 2011.

state.tx.us

dot.state.tx.us

Transportation Planning and Programming Division (n.d.). "Interstate Highway No. 10". Highway Designation Files. Texas Department of Transportation. Retrieved August 31, 2010.

tamu.edu

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tfhrc.gov

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.
Stufflebeam Row, Karen; LaDow, Eva & Moler, Steve (March 2004). "Glenwood Canyon 12 Years Later". Federal Highway Administration. Archived from the original on January 17, 2013. Retrieved May 11, 2008.

theconversation.com

Fitzgerald, Joan; Agyeman, Julian (September 7, 2021). "Removing urban highways can improve neighborhoods blighted by decades of racist policies". The Conversation. Retrieved December 4, 2023.

theguardian.com

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trafficsign.us

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National Joint Committee on Uniform Traffic Control Devices; American Association of State Highway Officials (1971). "Chapter 2D. Guide Signs: Conventional Roads" (PDF). Manual on Uniform Traffic Control Devices for Streets and Highways (1971 ed.). Washington, DC: Federal Highway Administration. p. 88. OCLC 221570. Archived (PDF) from the original on November 29, 2011. Retrieved February 22, 2012.
National Advisory Committee on Uniform Traffic Control Devices (1978). "Chapter 2D. Guide Signs: Conventional Roads" (PDF). Manual on Uniform Traffic Control Devices for Streets and Highways (1978 ed.). Washington, DC: Federal Highway Administration. p. ((2D-5)). OCLC 23043094. Archived (PDF) from the original on November 29, 2011. Retrieved February 22, 2012.

transportation.gov

Hecox, Doug (August 1, 2019). "New FHWA Report Reveals States with the Busiest Highways" (Press release). Federal Highway Administration. Retrieved August 30, 2022.

transportation.org

cms.transportation.org

American Association of State Highway and Transportation Officials (January 2000). "Establishment of a Marking System of the Routes Comprising the National System of Interstate and Defense Highways" (PDF). American Association of State Highway and Transportation Officials. Archived from the original (PDF) on November 1, 2006. Retrieved January 23, 2008.
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usatoday.com

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uslaw.link

Pub. L. 99–599: Surface Transportation Assistance Act of 1978

uspto.gov

tsdr.uspto.gov

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virginia.edu

etext.virginia.edu

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vmsom.com

VMS, Inc. (n.d.). "Projects by Type: Interstates". VMS, Inc. Archived from the original on September 22, 2007. Retrieved January 10, 2008.

vox.com

Stromberg, Joseph (May 11, 2016). "Highways Gutted American Cities. So Why Did They Build Them?". Vox. Archived from the original on April 25, 2019. Retrieved May 10, 2019.
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web.archive.org

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.
Stromberg, Joseph (May 11, 2016). "Highways Gutted American Cities. So Why Did They Build Them?". Vox. Archived from the original on April 25, 2019. Retrieved May 10, 2019.
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.
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.
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.
"The Interstate Highway System". History. A&E Television Networks. Archived from the original on May 10, 2019. Retrieved May 10, 2019.
Norton, Peter (1996). "Fighting Traffic: U.S. Transportation Policy and Urban Congestion, 1955–1970". Essays in History. Corcoran Department of History at the University of Virginia. Archived from the original on February 15, 2008. Retrieved January 17, 2008.
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.
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.
Nebraska Department of Roads (n.d.). "I-80 50th Anniversary Page". Nebraska Department of Roads. Archived from the original on December 21, 2013. Retrieved August 23, 2009.
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.
"America Celebrates 30th Anniversary of the Interstate System". US Highways. Fall 1986. Archived from the original on October 24, 2011. Retrieved March 10, 2012.
"Around the Nation: Transcontinental Road Completed in Utah". The New York Times. August 25, 1986. Archived from the original on March 16, 2017. Retrieved February 9, 2017.
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.
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.
Colorado Department of Transportation (n.d.). "CDOT Fun Facts". Colorado Department of Transportation. Archived from the original on January 16, 2008. Retrieved February 15, 2008.
Stufflebeam Row, Karen; LaDow, Eva & Moler, Steve (March 2004). "Glenwood Canyon 12 Years Later". Federal Highway Administration. Archived from the original on January 17, 2013. Retrieved May 11, 2008.
Neuharth, Al (June 22, 2006). "Traveling Interstates is our Sixth Freedom". USA Today. Archived from the original on August 19, 2012. Retrieved May 9, 2012.
Minnesota Department of Transportation (2006). "Mn/DOT Celebrates Interstate Highway System's 50th Anniversary". Minnesota Department of Transportation. Archived from the original on December 4, 2007. Retrieved January 17, 2008.
Sofield, Tom (September 22, 2018). "Decades in the Making, I-95, Turnpike Connector Opens to Motorists". Levittown Now. Archived from the original on April 6, 2020. Retrieved September 22, 2018.
Pennsylvania Turnpike Commission (n.d.). "Draft: Design Advisory Committee Meeting No. 2" (PDF). I-95/I-276 Interchange Project Meeting Design Management Summary. Pennsylvania Turnpike Commission. Archived from the original (PDF) on October 2, 2013. Retrieved May 11, 2008.
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.
Tuna, Gary (July 27, 1989). "Dawida seeks to merge I-70, turnpike at Breezewood". Pittsburgh Post-Gazette. Archived from the original on September 30, 2015. Retrieved November 19, 2015 – via Google News.
Missouri Department of Transportation (n.d.). "Converting US Route 71 to I-49". Interstate I-49 Expansion Corridor in Southwest District of Missouri. Missouri Department of Transportation. Archived from the original on January 17, 2013.
New Mexico State Highway and Transportation Department (2007). State of New Mexico Memorial Designations and Dedications of Highways, Structures and Buildings (PDF). Santa Fe: New Mexico State Highway and Transportation Department. p. 14. Archived from the original (PDF) on July 16, 2011.
"Nixon Approves Limit of 55 M.P.H." The New York Times. January 3, 1974. pp. 1, 24. Archived from the original on June 5, 2011. Retrieved July 27, 2008.
Carr, John (October 11, 2007). "State traffic and speed laws". Massachusetts Institute of Technology. Archived from the original on August 7, 2013. Retrieved January 10, 2008.
Koenig, Paul (May 27, 2014). "Speed Limit on Much of I-295 Rises to 70 MPH". Portland Press Herald. Archived from the original on July 27, 2014. Retrieved July 22, 2014.
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.
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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