{{short description|State highway in Wisconsin, United States}} {{Use American English|date=May 2025}} {{Use mdy dates|date=January 2025}} {{Infobox road |state=WI |type=WI |route=138 |map={{maplink-road|from=Wisconsin Highway 138.map}} |map_custom=yes |map_notes=WIS 138 highlighted in red |length_mi=13.23 |length_ref= <ref name="WH1">{{cite web|last = Bessert|first = Chris|title =Wisconsin Highways: Highways 130-139 (Highway 138)|work =Wisconsin Highways|url =https://www.wisconsinhighways.org/listings/WiscHwys130-139.html#STH-138|accessdate = 2007-03-20}}</ref> |length_round=2 |direction_a=South |direction_b=North |terminus_a={{Jct|state=WI|WI|59}} in [[Cooksville, Wisconsin|Cooksville]] |junction={{Jct|state=WI|US|51}} in [[Stoughton, Wisconsin|Stoughton]] |terminus_b={{Jct|state=WI|US|14}} in [[Oregon, Wisconsin|Oregon]] |counties=[[Rock County, Wisconsin|Rock]], [[Dane County, Wisconsin|Dane]] |previous_type=WI |previous_route=137 |next_type=WI |next_route=139 }}
'''State Trunk Highway 138''' (often called '''Highway 138''', '''STH-138''' or '''WIS 138''') is a [[state highway (US)|state highway]] in the [[U.S. state]] of [[Wisconsin]]. It runs west–east between [[Oregon, Wisconsin|Oregon]] and [[Stoughton, Wisconsin|Stoughton]] and north–south between Stoughton and [[Cooksville, Wisconsin|Cooksville]].
==Route description== [[File:South end of WIS 138, Cooksville, WI.JPG|thumb|left|Southern terminus of WIS 138 in Cooksville]] WIS 138 starts in [[Cooksville, Wisconsin|Cooksville]], an unincorporated community with an [[Evansville, Wisconsin|Evansville]] address. It runs north into [[Dane County, Wisconsin|Dane County]] towards [[Stoughton, Wisconsin|Stoughton]], although it makes one S-bend on the way. In Stoughton, it turns west with [[U.S. Route 51 in Wisconsin|US 51]]. It [[concurrency (road)|runs concurrently]] with US 51 to the west side of the city, then continues west in a straight line towards [[Oregon, Wisconsin|Oregon]]. It becomes Janesville Street once it crosses [[U.S. Route 14 in Wisconsin|US 14]].<ref>{{Google maps|access-date=March 20, 2021|title=Overview map of WIS 138|url=https://www.google.com/maps/dir/42.8348623,-89.2408024/WI-138+Trunk,+Oregon,+WI+53575/@42.88321,-89.3672847,18378m/data=!3m1!1e3!4m14!4m13!1m5!3m4!1m2!1d-89.2306202!2d42.9159517!3s0x8806463edac3acb3:0x41556a09e0d30dd2!1m5!1m1!1s0x88064b0c5a8a108f:0x73f92fa1dba4070f!2m2!1d-89.3670972!2d42.9175922!3e0}}</ref>
==History== Starting in 1923, WIS 138 was formed to travel roughly along its present-day route from WIS 10/WIS 106 (now US 51/WIS 138) in Stoughton to WIS 59 in Cooksville.<ref>{{Cite WisDOT map|year=1923|access-date=March 21, 2021}}</ref><ref>{{Cite WisDOT map|year=1924|access-date=March 21, 2021}}</ref> Up until 1962, no major change to the routing had happened. Then, WIS 138 superseded part of WIS 106 from Stoughton to US 14 near Oregon.<ref>{{Cite WisDOT map|year=1962|access-date=March 21, 2021}}</ref><ref>{{Cite WisDOT map|year=1963|access-date=March 21, 2021}}</ref> In late-1978, US 14 was moved onto a newly built expressway around Oregon. As a result, WIS 138 no longer needed to travel southwestward to get to US 14. Instead, it then continuously traveled westward to get to US 14.<ref>{{Cite WisDOT map|year=1978|access-date=March 21, 2021}}</ref><ref>{{Cite WisDOT map|year=1980|access-date=March 21, 2021}}</ref>
==Major intersections== {{mileposts}} {{jcttop}} {{WIint |county=Rock |location=Cooksville |mile= |road={{jct|state=WI|WI|59|city1=Cooksville}} |notes= }} {{WIint |county=Dane |cspan=3 |location=none |type=concur |mile= |road={{jct|state=WI|CTH|A|dir1=west}} |notes=Southern end of CTH-A concurrency }} {{WIint |location=Stoughton |type=concur |mile= |road={{jct|state=WI|US|51|CTH|A|dir2=west}} |notes=Northern end of CTH-A concurrency }} {{WIint |location=Oregon |mile= |road={{jct|state=WI|US|14|city1=Oregon}} |notes= }} {{jctbtm|keys=concur}}
==See also== *{{portal-inline|U.S. Roads}}
==References== {{reflist}}
==External links== {{Attached KML|display=title,inline}} *{{commons category-inline|Wisconsin Highway 138}}
[[Category:State highways in Wisconsin|138]] [[Category:Transportation in Rock County, Wisconsin]] [[Category:Transportation in Dane County, Wisconsin]]