Editing Interstate Highway System (section)

===1992–present===

====Discontinuities====
{{Main|List of gaps in Interstate Highways}}
[[File:Eisenhower Interstate System sign.jpg|thumb|left|Commemorative sign introduced in 1993. The system was established during Dwight D. Eisenhower's presidency, and the five stars commemorate his rank as [[General of the Army (United States)|General of the Army]] during World War II.]]

The system was proclaimed complete in 1992, but two of the original Interstates—[[Interstate 95|I-95]] and [[Interstate 70|I-70]]—were not continuous: both of these discontinuities were due to local opposition, which blocked efforts to build the necessary connections to fully complete the system. I-95 was made a continuous freeway in 2018,<ref name="sofield">{{cite news |first = Tom |last = Sofield |date = September 22, 2018 |title = Decades in the Making, I-95, Turnpike Connector Opens to Motorists |url = http://levittownnow.com/2018/09/22/decades-in-the-making-i-95-turnpike-connector-opens-to-motorists/ |work = Levittown Now |access-date = September 22, 2018 |archive-date = April 6, 2020 |archive-url = https://web.archive.org/web/20200406195324/http://levittownnow.com/2018/09/22/decades-in-the-making-i-95-turnpike-connector-opens-to-motorists/ |url-status = live}}</ref> and thus I-70 remains the only original Interstate with a discontinuity.

I-95 was discontinuous in New Jersey because of the cancellation of the [[Somerset Freeway]]. This situation was remedied when the construction of the [[Pennsylvania Turnpike/Interstate 95 Interchange Project]] started in 2010<ref name="PA">{{cite web |author = Pennsylvania Turnpike Commission |date = n.d. |url = http://www.paturnpikei95.com/pdf/DACMeeting050914.pdf |publisher = Pennsylvania Turnpike Commission |work = I-95/I-276 Interchange Project Meeting Design Management Summary |title = Draft: Design Advisory Committee Meeting No. 2 |access-date = May 11, 2008 |archive-url = https://web.archive.org/web/20131002051518/http://www.paturnpikei95.com/pdf/DACMeeting050914.pdf |archive-date = October 2, 2013 |url-status = dead |author-link = Pennsylvania Turnpike Commission}}</ref> and partially opened on September 22, 2018, which was already enough to fill the gap.<ref name="sofield" />

However, I-70 remains discontinuous in [[Pennsylvania]], because of the lack of a direct interchange with the [[Pennsylvania Turnpike]] at the eastern end of the [[concurrency (road)|concurrency]] near [[Breezewood, Pennsylvania|Breezewood]]. Traveling in either direction, I-70 traffic must exit the freeway and use a short stretch of [[U.S. Route 30 in Pennsylvania|US&nbsp;30]] (which includes a number of roadside services) to rejoin I-70. The interchange was not originally built because of a legacy federal funding rule, since relaxed, which restricted the use of federal funds to improve roads financed with tolls.<ref name="Federal Highway Administration">{{cite web |author = Federal Highway Administration |url = https://www.fhwa.dot.gov/infrastructure/tollroad.cfm |title = Why Does The Interstate System Include Toll Facilities? |publisher = Federal Highway Administration |date = n.d. |access-date = July 15, 2009 |archive-url = https://web.archive.org/web/20130518082124/http://www.fhwa.dot.gov/infrastructure/tollroad.cfm |archive-date = May 18, 2013 |url-status = live }}</ref> Solutions have been proposed to eliminate the discontinuity, but they have been blocked by local opposition, fearing a loss of business.<ref>{{cite news |title = Dawida seeks to merge I-70, turnpike at Breezewood |first = Gary |last = Tuna |work = Pittsburgh Post-Gazette |date = July 27, 1989 |via = Google News |url = https://news.google.com/newspapers?id=O7RRAAAAIBAJ&pg=4854,6978383&dq=robert-jubelirer+breezewood&hl=en |access-date = November 19, 2015 |archive-url = https://web.archive.org/web/20150930132552/https://news.google.com/newspapers?id=O7RRAAAAIBAJ&sjid=Wm4DAAAAIBAJ&pg=4854,6978383&dq=robert-jubelirer+breezewood&hl=en |archive-date = September 30, 2015 |url-status = live }}</ref>

====Expansions and removals====
{{see also|Future Interstate Highways|Freeway removal}}
The Interstate Highway System has been expanded numerous times. The expansions have both created new designations and extended existing designations. For example, [[Interstate 49|I-49]], added to the system in the 1980s as a freeway in [[Louisiana]], was designated as an expansion corridor, and FHWA approved the expanded route north from [[Lafayette, Louisiana]], to [[Kansas City, Missouri]]. The freeway exists today as separate completed segments, with segments under construction or in the planning phase between them.<ref>{{cite web |url = http://www.modot.org/southwest_archive/I-49MapsandInformation.htm |author = Missouri Department of Transportation |date = n.d. |publisher = Missouri Department of Transportation |work = Interstate I-49 Expansion Corridor in Southwest District of Missouri |title = Converting US Route 71 to I-49 |url-status = dead |archive-url = https://web.archive.org/web/20130117094333/http://www.modot.org/southwest_archive/I-49MapsandInformation.htm |archive-date = January 17, 2013 |author-link = Missouri Department of Transportation }}</ref>

In 1966, the FHWA designated the entire Interstate Highway System as part of the larger [[Pan-American Highway]] System,<ref>{{cite book |author = New Mexico State Highway and Transportation Department |url = http://www.nmshtd.state.nm.us/upload/contents/445/Memorial.pdf |title = State of New Mexico Memorial Designations and Dedications of Highways, Structures and Buildings |year = 2007 |location = Santa Fe |publisher = New Mexico State Highway and Transportation Department |page = 14 |url-status = dead |archive-url = https://web.archive.org/web/20110716081405/http://www.nmshtd.state.nm.us/upload/contents/445/Memorial.pdf |archive-date = July 16, 2011 |author-link = New Mexico State Highway and Transportation Department }}</ref> and at least two proposed Interstate expansions were initiated to help trade with Canada and Mexico spurred by the [[North American Free Trade Agreement]] (NAFTA). Long-term plans for [[Interstate 69|I-69]], which currently exists in several separate completed segments (the largest of which are in [[Indiana]] and [[Texas]]), is to have the highway route extend from [[Tamaulipas]], Mexico to [[Ontario]], Canada. The planned [[Interstate 11|I-11]] will then bridge the Interstate gap between [[Phoenix, Arizona]] and [[Las Vegas, Nevada]], and thus form part of the [[CANAMEX Corridor]] (along with [[Interstate 19|I-19]], and portions of [[Interstate 10|I-10]] and [[Interstate 15|I-15]]) between [[Sonora]], Mexico and [[Alberta]], Canada.