Open main menu

Wikipedia β

U.S. Route 18 in Wisconsin

In the U.S. state of Wisconsin, U.S. Route 18 (normally called U.S. Highway 18, Highway 18 or US 18) runs east–west across the southern part of the state. The highway serves as major connecting route between Madison and the southwest corner of the state. East of Madison, the route parallels Interstate 94 and serves as a local connection route to the communities along the interstate. US 18 enters Wisconsin at Prairie du Chien and ends in downtown Milwaukee at Lincoln Memorial Drive, across from the Milwaukee Art Museum.

US Highway 18 marker

US Highway 18
Route information
Maintained by WisDOT
Length 182.16 mi[1] (293.16 km)
Existed 1926 – present
Major junctions
West end US 18 in Prairie du Chien
East end Lincoln Memorial Drive in Milwaukee
Counties Crawford, Grant, Iowa, Dane, Jefferson, Waukesha, Milwaukee
Highway system
WIS 17 WIS 18


Route descriptionEdit

US 18 enters Crawford County from Iowa, crossing the Mississippi River using the Marquette-Joliet Bridge just west of Prairie du Chien. WIS 60 begins at the state line and runs concurrent with US 18 east from there. The two highways turn south at the along with Wisconsin Highway 35 downtown and head southeast out of the city. WIS 60 branches northeast from US 18 at Bridgeport. US 18 and WIS 35 continue southeast into Grant County[2] The two highways split at Patch Grove with WIS 35 continuing southeastward along with WIS 133 south, while US 18 turns eastward along with WIS 133 north. WIS 133 branches north at Mount Hope. US 18 and US 61 junction in downtown Fennimore. and WIS 80 north joins the highway in Montfort, on the Iowa County line.[3]

US 18/WIS 133 in Patch Grove

WIS 80 turns north at Cobb while US 18 continues east through Dodgeville, crossing WIS 23 and joining US 151 North. The two U.S. routes share a common expressway and bypass Ridgeway and Barneveld on the way east into Dane County.[4] in Dane County, US 18 and US 151 bypass Mount Horeb, crossing WIS 78 and WIS 92, and Verona and enter the Madison area, first passing through Fitchburg. Upon entering Madison, US 18 and US 151 join US 12 and US 14 east along the West Beltline Highway. US 151 and US 14 turn off the beltline three miles (5 km) east and US 12 and US 18 continue east, crossing US 51 and I-39 / I-90 southeast of Madison. Four miles east of the Interstates, US 12/US 18 becomes a two lane surface road again and passes through Cambridge, where US 12 splits southeast at the Jefferson County line.[5]

US 18 crosses WIS 89 and WIS 26 in Jefferson and passes through Sullivan.[6] Entering Waukesha County, Wisconsin, US 18 passes north of Dousman at WIS 67, south of the Kettle Moraine State Forest - Lapham Peak Unit and north of Wales at WIS 83.[7] US 18 then enters Waukesha along Summit Avenue. US 18 turns onto Delafield Street heading south, then takes a very sharp turn northeast — with the eastbound traffic following St. Paul Avenue and westbound traffic following North Street. The two streets merge and US 18 turns east onto Moreland Boulevard, WIS 164 joins US 18 from Les Paul Parkway south and follows it to the interchange with I-94. WIS 164 turns west onto I-94, and US 18 continues east into Brookfield along Blue Mound Road.[8] US 18 continues through Brookfield and Elm Grove along Blue Mound Road, and enter Milwaukee County and Wauwatosa.[7] US 18 crosses WIS 100, US 45, US 41, and I-41 near the Milwaukee County Zoo and continues east into Milwaukee.[9] At WIS 175, the highway shifts onto Wisconsin Ave. US 18 turns north onto North 35th street and east on to West Highland Ave where it crosses I-43 near downtown Milwaukee. US 18 turns south on 6th Street. East and westbound lanes split at State and 6th Streets; Eastbound continues south on 6th Street and then east on Wells Street. US 18 eastbound joins WIS 32 at North Broadway (southbound) and North Milwaukee Street (Northbound). Both directions turn east onto East Michigan Street as WIS 32 continues south. Westbound US 18 follows Milwaukee Street north from Michigan Street, turns west on State Street. At 6th Street, westbound US 18 rejoins eastbound lanes, turning north on 6th Street for one block, and then west on Highland Avenue. US 18 reaches its eastern terminus, the junction of Michigan Street and Lincoln Memorial Drive five blocks east of WIS 32, and one block north of I-794.[10]


Old US 18 bridge over the Wisconsin River in Bridgeport

Prior to 1926, the route that US 18 follows today was designated as WIS 19.[11] By 1923, the WIS 19 extended from Prairie du Chien to Milwaukee.[12] Shortly after US 18 was signed, it was rerouted along WIS 30 and WIS 19 - the present route within Milwaukee. The remainder of the route was relocated to its current alignment in 1932.[1][13]

The eastern terminus was an originally stated in official DOT documentation to be the junction of East Michigan Street and North Harbor Drive. This matched what commercial street maps were showing after many years of inaccuracies.[1]

Between 1980 and 1990, 38 miles (61 km) of US 18/US 151 was upgraded to expressway standards, with the section around Verona being the final piece to be completed in 1995. US 12/US 18 was upgraded to expressway standards between I-39/I-90 to North Star Road, west of Cambridge. The remainder wasn't expanded, but straightened out to eliminate sharp curves.[1]

Major intersectionsEdit

County Location mi km Exit Destinations Notes
Mississippi River 0.00 0.00   US 18 west – Marquette, Charles City Continuation into Iowa
Marquette–Joliet Bridge; Iowa–Wisconsin state line
  WIS 60 begins; western end of WIS 60 overlap
Crawford Prairie du Chien   WIS 27 north – Eastman
  WIS 35 north – Lynxville Western end of WIS 35 overlap
Bridgeport   WIS 60 east – Wauzeka Eastern end of WIS 60 overlap
Grant Town of Patch Grove    WIS 35 south / WIS 133 south – Cassville Ferry Eastern end of WIS 35 overlap; western end of WIS 133 overlap
Mount Hope   WIS 133 north – Boscobel Eastern end of WIS 133 overlap
Fennimore   US 61 north – Boscobel Western end of US 61 overlap
  US 61 south – Lancaster Eastern end of US 61 overlap
county line
Montfort   WIS 80 south – Platteville Western end of WIS 80 overlap
Iowa Cobb   WIS 80 north – Highland, Muscoda Eastern end of WIS 80 overlap
Town of Linden   WIS 39 – Linden, Mineral Point
Dodgeville   WIS 23 – Mineral Point, Spring Green
Town of Dodgeville 47 60   US 151 south – Dubuque Western end of US 151 overlap
Barneveld 58   CTH-ID – Barneveld
Dane Town of Blue Mounds 65    
    Bus. US 18 / Bus. US 151 / WIS 78 – Mount Horeb, Blanchardville
US 18 Business / US 151 Business only signed northbound
Mount Horeb 69    
    Bus. US 18 / Bus. US 151 / CTH-ID – Mount Horeb
US 18 Business / US 151 Business only signed southbound
Town of Springdale 70    CTH-PD to CTH-P – Cross Plains
Town of Verona 75   CTH-G (Dairy Ridge Road) – Mount Vernon
Verona 76    
    Bus. US 18 / Bus. US 151 / CTH-MV (W. Verona Avenue) / Epic Lane
US 18 Business / US 151 Business only signed northbound
77   WIS 69 – Belleville, New Glarus
79    CTH-PB to CTH-M – Paoli, Oregon
Town of Verona 81    
    Bus. US 18 / Bus. US 151 / CTH-MV – Verona
Southbound exit and northbound entrance only
Madison 258    US 12 west / US 14 west (Beltline Highway) / Midvale Boulevard – Dodgeville Western end of US 12 and US 14 overlaps.
258A Seminole Highway Westbound exit and eastbound entrance only
259 Todd Drive
260   CTH-D (Fish Hatchery Road) Eastbound exits signed 260A (south) and 260B (north)
261    US 14 east / US 151 north (Park Street) – Oregon Eastern end of US 14 and US 151 overlaps
262   CTH-MM (Rimrock Road)
263 John Nolen Drive
Monona 264   CTH-BW east (West Broadway)
265 Monona Drive
Madison 266   US 51 (Stoughton Road)
267     I-39 / I-90 to I-94 – Janesville, Chicago, Wisconsin Dells, Milwaukee Signed as exits 267A (east/south) and 267B (west/north); I-39 / I-90 exit 142
Town of Deerfield   WIS 73 north Western end of WIS 73 overlap
Town of Christiana   WIS 73 south Eastern end of WIS 73 overlap
Cambridge   WIS 134 north
  US 12 east – Fort Atkinson Eastern end of US 12 overlap
Jefferson Town of Jefferson   WIS 89 north – Lake Mills Western end of WIS 89 overlap
  WIS 89 south – Fort Atkinson Eastern end of WIS 89 overlap
  WIS 26 – Fort Atkinson, Johnson Creek Interchange
  Bus. WIS 26 (Main Street)
Waukesha Dousman   WIS 67 – Oconomowoc, Eagle
Wales   WIS 83 – Hartland, Mukwonago Roundabout
Waukesha   WIS 164 south Western end of WIS 164 overlap
   I-94 / WIS 164 north – Milwaukee, Madison Eastern end of WIS 164 overlap
Milwaukee Wauwatosa   WIS 100 (N. 108th Street)
    I-41 / US 41 / US 45
  WIS 181 (Glenview Avenue)
Milwaukee   To WIS 175 / Wisconsin Avenue
  WIS 57 south (N. 27th Street) Western end of WIS 57 overlap
  WIS 57 north (N. 20th Street) Eastern end of WIS 57 overlap
  I-43 north – Green Bay Northbound I-43 entrance and southbound I-43 exit only
  WIS 145 north (N. 6th Street) Western end of WIS 145 overlap
  WIS 145 ends Eastern end of WIS 145 overlap
  WIS 32 north (E. Wells Street) Western end of WIS 32 overlap
  WIS 32 south (E. Michigan Street) Eastern end of WIS 32 overlap
Lincoln Memorial Drive
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


Route map: Google

KML is from Wikidata
  1. ^ a b c d Bessert, Chris. "Wisconsin Highways: Highways 10-19 (U.S. Highway 18)". Wisconsin Highways. Retrieved 2008-01-01. 
  2. ^ Crawford Co (pdf) (Map). Wisconsin Department of Transportation. Retrieved 2008-01-01. 
  3. ^ Grant Co (pdf) (Map). Wisconsin Department of Transportation. Retrieved 2008-01-01. 
  4. ^ Iowa Co (pdf) (Map). Wisconsin Department of Transportation. Retrieved 2008-01-01. 
  5. ^ Dane Co (pdf) (Map). Wisconsin Department of Transportation. Retrieved 2008-01-01. 
  6. ^ Jefferson Co (pdf) (Map). Wisconsin Department of Transportation. Retrieved 2008-01-01. 
  7. ^ a b Waukesha Co (pdf) (Map). Wisconsin Department of Transportation. Retrieved 2008-01-01. 
  8. ^ City of Waukesha Ward and Aldermanic Districts Map (pdf) (Map). City of Waukesha. Retrieved 2008-01-01. 
  9. ^ Milwaukee Co (pdf) (Map). Wisconsin Department of Transportation. Retrieved 2008-01-01. 
  10. ^ Google (2008-01-01). "US-18, Milwaukee" (Map). Google Maps. Google. Retrieved 2008-01-01. 
  11. ^ Official Auto Trails Map (Map). 1:1,081,344. Rand McNally. 1921. p. 330-331. 
  12. ^ "Complete Plans for Roadwork". Telegraph-Herald. Dubuque, Iowa. April 2, 1923. p. 5. Retrieved January 8, 2011. 
  13. ^ "Rand McNally Auto Road Atlas". Rand McNally. 1926. Retrieved 2008-01-01. 

  U.S. Route 18
Previous state:
Wisconsin Next state: