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Interstate 43
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{{Short description|Interstate Highway in eastern Wisconsin}} {{Use mdy dates|date=January 2024}} {{Infobox road |state=WI |type=I |route=43 |map={{MapframeForObjects|frame=yes|plain=yes|frame-align=center|frame-width=290|frame-height=290|type=line|raw={{Wikipedia:Map data/Wikipedia KML/Interstate 43}}}} |map_custom=yes |map_notes=I-43 highlighted in red |length_mi=191.55 |length_ref=<ref name="FHWA_Length_I43_new">{{cite web |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, 2015 |first= Kevin |last= Adderly |publisher= Federal Highway Administration |work= Route Log and Finder List |date= January 27, 2016 |access-date= February 6, 2016}}</ref> |established=1981<ref name="FHWA_I43">{{cite web |first1= Stefan |last1= Natzke |first2= Kevin |last2= Adderly |name-list-style= amp |date= May 4, 2012 |title= Economic Development History of Interstate 43 Corridor |work= Economic Development |publisher= [[Federal Highway Administration]] |url= https://www.fhwa.dot.gov/planning/economic_development/studies/i43wi.cfm |access-date= March 20, 2013}}</ref> |tourist=[[File:Lake Michigan Circle Tour.svg|20px|alt=|link=]] [[Lake Michigan Circle Tour]] |direction_a=South |direction_b=North |terminus_a={{Jct|state=WI|I|39|I|90}} in [[Beloit, Wisconsin|Beloit]] |junction=<!-- Major junctions only; Only 5-8 most major intersections and cities belong here; please read [[WP:USRD/STDS]] for more info -->{{plainlist|1= *{{Jct|state=WI|US|14}} in [[Darien, Wisconsin|Darien]] *{{Jct|state=WI|US|12}} in [[Elkhorn, Wisconsin|Elkhorn]] *{{Jct|state=WI|US|45|WI|100}} in [[Greenfield, Wisconsin|Greenfield]] *{{Jct|state=WI|I|41|I|94|I|894|US|41}} in [[Milwaukee]] *{{Jct|state=WI|WI|23}} in [[Sheboygan, Wisconsin|Sheboygan]] *{{Jct|state=WI|US|151|WI|42}} in [[Manitowoc, Wisconsin|Manitowoc]] *{{Jct|state=WI|WI|54|WI|57}} in [[Green Bay, Wisconsin|Green Bay]] }} |terminus_b={{Jct|state=WI|I|41|US|41|US|141}} in [[Howard, Wisconsin|Howard]] |counties=[[Rock County, Wisconsin|Rock]], [[Walworth County, Wisconsin|Walworth]], [[Waukesha County, Wisconsin|Waukesha]], [[Milwaukee County, Wisconsin|Milwaukee]], [[Ozaukee County, Wisconsin|Ozaukee]], [[Sheboygan County, Wisconsin|Sheboygan]], [[Manitowoc County, Wisconsin|Manitowoc]], [[Brown County, Wisconsin|Brown]] |previous_type=WI |previous_route=42 |next_type=WI 1970 |next_route=43 }} '''Interstate 43''' ('''I-43''') is a {{convert|191.55|mi|km|adj=mid|-long}} [[Interstate Highway]] located entirely within the US state of [[Wisconsin]], connecting [[Interstate 39|I-39]]/[[Interstate 90 in Wisconsin|I-90]] in [[Beloit, Wisconsin|Beloit]] with [[Milwaukee]] and [[Interstate 41|I-41]], [[U.S. Route 41 in Wisconsin|U.S. Highway 41]] (US 41) and [[U.S. Route 141|US 141]] in [[Green Bay, Wisconsin|Green Bay]]. [[Wisconsin Highway 32|State Trunk Highway 32]] (WIS 32) [[concurrency (road)|runs concurrently]] with I-43 in two sections and [[Interstate 94 in Wisconsin|I-94]], [[Interstate 894|I-894]], [[U.S. Route 10 in Wisconsin|US 10]], US 41, [[U.S. Route 45 in Wisconsin|US 45]], and [[Wisconsin Highway 57|WIS 57]] overlap I-43 once each. There are no auxiliary or business routes connected to I-43, though an alternate route to direct traffic during road closures is signed along local and state highways from Milwaukee County north into Brown County. I-43 came about as a result of toll road proposals that included a Milwaukee to [[Superior, Wisconsin|Superior]] corridor that included [[Hurley, Wisconsin|Hurley]], [[Wausau, Wisconsin|Wausau]], and Green Bay. Only the Milwaukee-to-Green Bay section was approved. The route was originally planned to follow an alignment about midway between US 41 and US 141 (the latter paralleled Lake Michigan at the time) along WIS 57. Controversy about this location and use of [[right-of-way (transportation)|right-of-way]] led to the establishment of the current alignment, which follows much of what was the 1950s-era realignment of US 141 from Milwaukee to [[Sheboygan, Wisconsin|Sheboygan]], and a new alignment from Sheboygan to Green Bay. This section was completed in 1981. The Beloit-to-Milwaukee segment was developed after two separate proposals for Interstates, one of them between Milwaukee and Beloit and the other between Milwaukee and [[Janesville, Wisconsin|Janesville]]. The Milwaukee–Beloit route was chosen, completed in 1976 as WIS 15 and renumbered as I-43 in 1988. To connect the two segments, I-43 was signed concurrently with the east–west segment of I-894 and the north–south portion of I-94 in the greater Milwaukee metropolitan area from the [[Hale Interchange]] to the [[Marquette Interchange]], which was completely reconstructed with work being completed in 2008.
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