Editing Interstate Highway System (section)

==Statistics==

[[File:Miami_traffic_jam,_I-95_North_rush_hour.jpg|thumb|right|Motor vehicles on I-95 in Miami]]

===Volume===
* '''Heaviest traveled''': 379,000&nbsp;vehicles per day: [[Interstate 405 (California)|I-405]] in Los Angeles, California (2011 estimate).<ref>{{cite press release |first = Doug |last = Hecox |title = New FHWA Report Reveals States with the Busiest Highways |url = https://www.transportation.gov/briefing-room/new-fhwa-report-reveals-states-busiest-highways |publisher = Federal Highway Administration |access-date = August 30, 2022 |date = August 1, 2019 }}</ref>

===Elevation===
* '''Highest''': {{convert|11158|ft|m}}: [[Interstate 70 in Colorado|I-70]] in the [[Eisenhower Tunnel]] at the [[Continental Divide of the Americas|Continental Divide]] in the [[Colorado]] [[Rocky Mountains]].<ref name="Interstate Highway System Fact Sheet">{{cite web |url = http://www.interstate50th.org/docs/InterstateHighwayFactSheet.pdf |archive-url = https://web.archive.org/web/20081010060935/http://www.interstate50th.org/docs/InterstateHighwayFactSheet.pdf |archive-date = October 10, 2008 |title = Interstate Highway Fact Sheet |publisher = American Association of State Highway and Transportation Officials |access-date = February 22, 2012 |author = American Association of State Highway and Transportation Officials |date = n.d. }}</ref>
* '''Lowest (land)''': {{convert|−52|ft|m|}}: [[Interstate 8|I-8]] at the [[New River (Mexico–United States)|New River]] near [[Seeley, California]].<ref name="Interstate Highway System Fact Sheet" />
* '''Lowest (underwater)''': {{convert|-103|ft|m}}: [[Interstate 95 in Maryland|I-95]] in the [[Fort McHenry Tunnel]] under the [[Inner Harbor|Baltimore Inner Harbor]].<ref>{{cite web |first1 = Jerry |last1 = Hall |first2 = Loretta |last2 = Hall |name-list-style = amp |date = July 1, 2009 |url = http://westernite.org/2009/the-adobe-tower-interesting-items-about-the-interstate-system/ |title = The Adobe Tower: Interesting Items about the Interstate System |work = Westernite |publisher = Western District of the Institute of Transportation Engineers |access-date = July 23, 2013 |url-status = dead |archive-url = https://web.archive.org/web/20130928111912/http://westernite.org/2009/the-adobe-tower-interesting-items-about-the-interstate-system/ |archive-date = September 28, 2013 }}</ref>

===Length===
* '''Longest (east–west)''': {{convert|3020.54|mi|km}}: [[Interstate 90|I-90]] from [[Boston|Boston, Massachusetts]], to [[Seattle|Seattle, Washington]].<ref name="fhwa-facts-1">{{cite web |first1 = Jon |last1 = Obenberger |first2 = Tony |last2 = DeSimone |name-list-style = amp |url = https://www.fhwa.dot.gov/programadmin/interstate.cfm#interstate_trivia |title = Interstate System Facts |work = Route Log and Finder List |publisher = Federal Highway Administration |date = April 7, 2011 |access-date = February 22, 2012 |archive-url = https://web.archive.org/web/20130713093446/http://www.fhwa.dot.gov/programadmin/interstate.cfm#interstate_trivia |archive-date = July 13, 2013 |url-status = live }}</ref><ref name="fhwa-facts-2">{{cite web |author = Federal Highway Administration |url = https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/?redirect |title = Miscellaneous Interstate System Facts |publisher = Federal Highway Administration |date = April 6, 2011 |access-date = February 22, 2012 |archive-url = https://web.archive.org/web/20140805032748/http://www.fhwa.dot.gov/reports/routefinder/#s11 |archive-date = August 5, 2014 |url-status = live }}</ref>
* '''Longest (north–south)''': {{convert|1908|mi|km|abbr=on}}: [[Interstate 95|I-95]] from the [[Canada–United States border|Canadian border]] near [[Houlton, Maine]], to [[Miami|Miami, Florida]].<ref name="fhwa-facts-1" /><ref name="sofield" /> 
* '''Shortest (two-digit)''': {{convert|1.40|mi|km|abbr=on}}: [[Interstate 69W|I-69W]] in [[Laredo, Texas]].<ref>{{cite web |title = FHWA Route Log and Finder List |url = https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/ |date = January 31, 2018 |publisher = Federal Highway Administration |access-date = August 25, 2018 |archive-url = https://web.archive.org/web/20180711022000/https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/ |archive-date = July 11, 2018 |url-status = live }}</ref>
* '''Shortest (auxiliary)''': {{convert|0.70|mi|km|abbr=on}}: [[New York State Route 878#Northern segment|I-878]] in [[Queens]], [[New York City|New York]], [[New York (state)|New York]].<ref>{{cite web |first = Kevin |last = Adderly |date = December 31, 2016 |title = Table 2: Auxiliary Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2016 |url = https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table02.cfm |work = Route Log and Finder List |publisher = Federal Highway Administration |access-date = September 24, 2017 |archive-date = February 13, 2023 |archive-url = https://web.archive.org/web/20230213083642/https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table02.cfm |url-status = live }}</ref><ref>{{Cite news |url = https://www.latimes.com/archives/la-xpm-1996-04-19-me-60325-story.html |title = The Freeway Numbers Game |last = Curtiss |first = Aaron |date = April 19, 1996 |work = Los Angeles Times |access-date = August 31, 2017 |issn = 0458-3035 |archive-date = August 5, 2019 |archive-url = https://web.archive.org/web/20190805131737/https://www.latimes.com/archives/la-xpm-1996-04-19-me-60325-story.html |url-status = live }}</ref>
* '''Longest segment between state lines''': {{convert|877|mi|km|abbr=on}}: [[Interstate 10 in Texas|I-10 in Texas]] from the [[New Mexico]] state line near [[El Paso, Texas|El Paso]] to the [[Louisiana]] state line near [[Orange, Texas]].<ref>{{TxDOT|IH|10|access-date=August 31, 2010}}</ref>
* '''Shortest segment between state lines''': {{convert|453|ft|m|abbr=on}}: [[Interstate 95 in the District of Columbia|I-95]]/[[Interstate 495 (Capital Beltway)|I-495]] (Capital Beltway) on the [[Woodrow Wilson Bridge]] across the [[Potomac River]] where they briefly cross the southernmost tip of the [[Washington, DC|District of Columbia]] between its borders with [[Maryland]] and [[Virginia]].<ref name="fhwa-facts-2" />
* '''Longest concurrency''': {{convert|278.4|mi|km|abbr=on}}: [[Interstate 80|I-80]] and [[Interstate 90|I-90]]; [[Gary, Indiana]], to [[Elyria, Ohio]].<ref name="route-finder">{{cite web |first = Jeff |last = Price |url = https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table01.cfm |title = Table 1: Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways as of December 31, 2018 |work = Route Log and Finder List |publisher = Federal Highway Administration |date = May 6, 2019 |access-date = June 21, 2021 |archive-url = https://web.archive.org/web/20120422220808/http://www.fhwa.dot.gov/reports/routefinder/table1.cfm |archive-date = April 22, 2012 |url-status = live }}</ref>
<!--* '''Shortest concurrency''': {{convert|.22|mi|km|abbr=on}}: [[Interstate 71 in Ohio|I-71]] and [[Interstate 75 in Ohio|I-75]]; in Cincinnati from the Ohio River on the lower deck of the [[Brent Spence Bridge]] at the state line north to the Fort Washington Way entrance west of [[Paul Brown Stadium]].<ref name="route-finder" />--><!--I'm commenting out this entire entry because the concurrency continues for 19.70 more miles in Kentucky according to the source, so the full I-71/I-75 concurrency is almost 20 miles long...-->

===States===
* '''Most states served by an Interstate''': 15&nbsp;states plus the District of Columbia: [[Interstate 95|I-95]] through [[Interstate 95 in Florida|Florida]], [[Interstate 95 in Georgia|Georgia]], [[Interstate 95 in South Carolina|South Carolina]], [[Interstate 95 in North Carolina|North Carolina]], [[Interstate 95 in Virginia|Virginia]], [[Interstate 95 in the District of Columbia|DC]], [[Interstate 95 in Maryland|Maryland]], [[Interstate 95 in Delaware|Delaware]], [[Interstate 95 in Pennsylvania|Pennsylvania]], [[Interstate 95 in New Jersey|New Jersey]], [[Interstate 95 in New York|New York]], [[Interstate 95 in Connecticut|Connecticut]], [[Interstate 95 in Rhode Island|Rhode Island]], [[Interstate 95 in Massachusetts|Massachusetts]], [[Interstate 95 in New Hampshire|New Hampshire]], and [[Interstate 95 in Maine|Maine]].<ref name="fhwa-facts-1" />
* '''Most Interstates in a state''': 32 routes: New York, totaling {{convert|1750.66|mi|km|abbr=on}}<ref name="fhwa route log">{{cite web |title = Table 3: Interstate Routes in Each of the 50 States, District of Columbia, and Puerto Rico |url = https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table03.cfm |work = Route Log and Finder List |publisher = Federal Highway Administration |access-date = August 25, 2018 |archive-url = https://web.archive.org/web/20180711030748/https://www.fhwa.dot.gov/planning/national_highway_system/interstate_highway_system/routefinder/table03.cfm |archive-date = July 11, 2018 |url-status = live }}</ref>
* '''Most primary Interstates in a state''': 13 routes: Illinois{{#tag:ref|This counts the suffixed routes in Texas ([[I-35E (Texas)|I-35E]], [[I-35W (Texas)|I-35W]], [[I-69E]], [[I-69C]], and [[I-69W]]) as auxiliary routes or parts of the same primary Interstate and not separate primary Interstates.|group=lower-alpha}}<ref name="fhwa route log" />
* '''Most Interstate mileage in a state''': {{convert|3233.45|mi|km|abbr=on}}: Texas, in 17 different routes.<ref name="fhwa-facts-1" />
* '''Fewest Interstates in a state''': 3 routes: Delaware, New Mexico, North Dakota, and Rhode Island. Puerto Rico also has 3 routes.<ref name="fhwa route log" />
* '''Fewest primary Interstates in a state''': 1 route: Delaware, Maine, and Rhode Island (I-95 in each case).<ref name="fhwa route log" />
* '''Least Interstate mileage in a state''': {{convert|40.61|mi|km|abbr=on}}: Delaware, in 3 different routes.<ref name="fhwa route log" />