Iowa US 151 begins at exit 225 along
I-80 in rural
Iowa County north of
Williamsburg. The highway heads to the north and intersects
US 6 outside of
Homestead, Iowa. US 151 turns east onto US 6 and the two routes
run concurrently for about until US 6 splits to the east at Homestead. US 151 continues to the north and crosses the
Iowa River on its way to Amana, the main village of the
Amana Colonies and the eastern end of
Iowa Highway 220 (Iowa 220). The road clips the southeastern corner of
Benton County, Iowa at
Walford and it turns to the northeast toward
Fairfax. When it reaches the
US 30 /
US 218 freeway in
Cedar Rapids, US 151 turns east onto the highway while
US 151 Business continues northeast on Williams Boulevard SW. The freeway is dotted with interchanges providing access to southern Cedar Rapids, most importantly Edgewood Road SW,
I-380, and C Street SW. Just east of the
Cedar River, US 151 exits from US 30, which continues east toward
Clinton. ; a scene from the movie
Field of Dreams was filmed on this particular segment of the highway. The route splits from the other roads and continues toward
Dubuque as an
expressway. This stretch crosses many major rivers including both the
Wapsipinicon and the
Maquoketa. The road eventually goes into the
Driftless Area where it meets up with US 61 around the
Dubuque Regional Airport. US 52 briefly joins the two routes, concurrently, for two miles south of Dubuque. The combined road then heads into the state of
Wisconsin.
Dubuque to Madison US 61/US 151 crosses the
Mississippi River into Wisconsin via the
Dubuque-Wisconsin Bridge from Dubuque, Iowa and passes through a cut in the river ridge before turning northward to the western terminus of
WIS 11 after of due east travel.
WIS 35 and the
Great River Road join the route at that interchange, heading north. The highway at this point is limited access highway with two lanes in each direction. The northward trek of the route passes through mixed residential and farmland as it crosses Badger Road and merges with Eagle Point Road. Eagle Point road merges with US 151 from the left side of the road. The limited access portion ends at this interchange. Another pair of half
diamond interchanges connect the highway with County Trunk Highway HHH (CTH-HHH) and CTH-H as it bypasses
Kieler to the northwest. At
Dickeyville, US 61, WIS 35 and the Great River Road route exit north off of US 151 into town. US 151 passes Dickeyville to the east and descends into a valley cut northeast of the village, paralleling the Little Platte River and Blockhouse Creek within the valley for a stretch before climbing back onto the ridge top on the other side of the valley. US 151 then approaches
Platteville and enters a section of limited access at CTH-D (US 151 Business). The limited access stretch ends after three interchanges to the east. The last of the interchanges is
WIS 126/CTH-G with access to
Belmont. The route turns northeastward from this point, crosses the Cottage Inn Branch and begins the first of several descents into valleys, two of which are prior to passing
Mineral Point and another two while passing the city. The highway is limited access between the two interchanges that provide access to Mineral Point: CTH-O and
WIS 23. WIS 23 joins US 151 heading northbound at that point until the first interchange at Dodgeville. This interchange begins another short stretch of freeway to the point where
US 18 joins the route. US 18/US 151 heads eastbound past that interchange. Access to Barneveld is at an interchange with CTH-ID and an at-grade intersection with CTH-K. CTH-ID parallels US 18/US 151 for the entire stretch between Barneveld and
Mount Horeb. A section of freeway begins at
WIS 78 and ends at the other end of CTH-ID as the highway bypasses Mount Horeb just to the south of the city's passing residential subdivisions. A mix of grade separation and level intersections cross the winding highway as it continues eastward until the interchange with CTH-MV (Verona Avenue) begins a section of freeway that bypasses
Verona to the south. This section provides access to four interchanges including the two endpoints of CTH-MV. The freeway continues into
Fitchburg and provides access to two interchanges at CTH-PD (McKee Road) and Williamsburg Way. The freeway then ends. The road continues as an urban multilane highway known as Verona Road as it enters Madison. Verona Road passes through a residential and commercial area on the Southwest Side of Madison. US 18 and US 151 merge east on the West Beltline Highway—joining
US 12 and
US 14. At this interchange, US 14 turns south off the beltline towards
Oregon, and US 151 turns north and into central Madison on South Park Street. It crosses the same railroad corridor and passes Monona Bay to the west along South Park Street. US 151 turns northeast onto West Washington Avenue for about then follows Proudfit Street and North Shore Drive—paralleling the Monona Bay shore—and turns north onto John Nolen Drive. The street passes under the
Monona Terrace Convention Center as it passes to the south and east of downtown Madison. US 151 turns northwest onto South Blair Street for three city blocks to East Washington Avenue—where it turns northeast and follows East Washington Avenue, bisecting the
Madison Isthmus, and leading out of the city to the east. The western terminus of
WIS 30 meets US 151 about northeast of the South Blair Street turn, and US 51 crosses US 151 further northeast. The second study is examining freeway conversions to the route from WIS 73 in Columbus to WIS 49 in Waupun.
Fond du Lac to Manitowoc The multi-lane section of US 151 ends after turning north away from Fond du Lac and the route follows the east shore of Lake Winnebago for about half the length of the shoreline. US 151 then turns east at the intersection with
WIS 55 and follows two-lane surface roads and briefly running concurrently with
WIS 32 and
WIS 57 in
Chilton. The roadway passes through farmland throughout this section until it picks up
WIS 42 just outside of Manitowoc and ends at
I-43 while WIS 42 continues east into Manitowoc. ==History==