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State Trunk Highway 100 (STH 100, commonly known as Highway 100 or WIS 100) is a road which encircles the outer edges of Milwaukee County. Officially, the road is designed as a bypass around the city of Milwaukee, but with residential and commercial development along Highway 100 on almost all portions of the road, this purpose has been negated, and it serves as one of the Milwaukee area's major commercial corridors. Highway 100 roughly parallels the freight railroad beltway around Milwaukee constructed in 1912 by the Chicago and North Western Transportation Company, approximately one mile inside the north, west and south county lines.

State Trunk Highway 100 marker

State Trunk Highway 100
Route information
Maintained by WisDOT
Length 39.7 mi[1] (63.9 km)
Major junctions
South end WIS 32 in Oak Creek
  I-41 / I-94 in Oak Creek
US 45 / WIS 36 in Franklin
I-43 / US 45 in Hales Corners
I-94 in West Allis
US 18 in Wauwatosa
US 45 in Wauwatosa
US 45 in Milwaukee
I-41 / WIS 175 in Milwaukee
I-41 / US 45 / WIS 74 in Menomonee Falls
North end I-43 / WIS 32 in Bayside
Counties Milwaukee, Waukesha
Highway system
WIS 98 WIS 101

In Milwaukee's immediate western suburb Wauwatosa, Highway 100's north–south segment was once known as Lovers Lane; parts of the road still have this designation. In the vicinity of Mayfair Shopping Center, it is known as Mayfair Road; this corresponds to 108th street in Milwaukee's numbered roadways scheme.

The roadway served the Muirdale Tuberculosis Sanatorium and County Airfield and Limestone Quarry at what is now Currie Park. In the late 1950s, due to the combination of ready roadway and rail access, the area experienced an employment boom as several large cold storage warehouses and food-related truck terminals were constructed nearby. With the development of the Mayfair Shopping Center in 1958 by malting scion Kurtis Froedtert, the name was changed to Mayfair Road. One of the few vestiges of this earlier era is the roadway's popularity as a "cruising strip" for exhibition motorists. Many signs posted at various intervals on light posts in the median state that it is unlawful to pass a controlled point more than three times in West Allis, which can result in a fine.

Cruising Was Banned on HWY 100 in May 1990. Hovever This Law has Ingored By Many Wisconsiners.



Highway 100 was initially a county-constructed concrete loop highway known as County Trunk Highway L.[2]

Major intersectionsEdit

County Location mi km Exit Destinations Notes
Milwaukee Oak Creek   WIS 32 – Milwaukee, Racine
    I-41 / I-94 / US 41 – Milwaukee, Chicago
Franklin    US 45 south / WIS 36 – Burlington Southern end of US 45 overlap
  Rawson Avenue (CTH-BB) Interchange
Hales Corners   WIS 24 (Janesville Road)
Greenfield     I-43 north / US 45 north to I-894 Northern end of US 45 overlap; no access to southbound I-43 or from northbound I-43
   Layton Avenue (CTH-Y) to I-43 south Completes access to I-43
West Allis   WIS 59 (Greenfield Avenue)
  I-94 – Milwaukee, Madison
Wauwatosa   US 18 (Bluemound Road)
   I-41 north / US 45 north Northbound entrance only; no exit ramps
  WIS 190 (Capitol Drive)
Milwaukee 46     I-41 south / US 45 south / CTH-E (Silver Spring Drive) Southern end of I-41 / US 45 overlap
47A    US 41 south / WIS 175 north (Appleton Avenue) Southern end of US 41 overlap; no northbound access from southbound roadways
47B Good Hope Road
county line
MilwaukeeMenomonee Falls line 48   WIS 145
Waukesha Menomonee Falls 50A     I-41 north / US 41 north / US 45 north – Fond du Lac Northern end of I-41 / US 41 / US 45 overlap
county line
Menomonee FallsMilwaukee line   WIS 145 south
Milwaukee Milwaukee   WIS 181 (76th Street) Interchange
Brown Deer   WIS 57 (Green Bay Road) Interchange
River HillsBayside
Fox Point tripoint
   I-43 / WIS 32 – Milwaukee, Green Bay
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


External linksEdit