Iowa Highway 188 (Iowa 188) is a state highway in north-central

Iowa Iowa () is a state in the Midwestern region of the United States, bordered by the Mississippi River to the east and the Missouri River and Big Sioux River to the west. It is bordered by six states: Wisconsin to the northeast, Illinois to th ...

. The route is signed both north–south and east–west because of a 90-degree corner near the route's midpoint. The route begins at

Iowa Highway 3 Iowa Highway 3 (Iowa 3) is a state highway that runs from east to west across the state of Iowa. It is the longest state highway in Iowa, at long. Iowa 3 begins at the South Dakota state line where it continues as South Dakota Highwa ...

south of Clarksville and ends at U.S. Highway 63 near

Tripoli Tripoli or Tripolis may refer to: Cities and other geographic units Greece *Tripoli, Greece, the capital of Arcadia, Greece * Tripolis (region of Arcadia), a district in ancient Arcadia, Greece * Tripolis (Larisaia), an ancient Greek city in ...

Route description

Iowa Highway 188 begins at a

T intersection A three-way junction (or three-way intersection) is a type of road intersection with three arms. A Y junction (or Y intersection) generally has three arms of equal size coming at an acute or obtuse angle to each other; while a T junction (or T ...

with

south of Clarksville. From Iowa 3, Iowa 188 heads north where it crosses the

Shell Rock River The Shell Rock River is a U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map accessed May 13, 2011 tributary of the West Fork Cedar River in southern Minnesota and northern Iowa in the United States ...

and forms the eastern boundary of Heery Woods State Park. It passes through Clarksville and continues north for . At four-way intersection with Butler County Road T64 and a gravel road, Iowa 188 turns to the east and becomes an east–west road for the remainder of its journey. Iowa 188 heads east for where it crosses into Bremer County one mile (1.6 km) west of Plainfield. One half-mile (0.8 km) into Bremer County, is a

diamond interchange A diamond interchange is a common type of road junction, used where a controlled-access highway crosses a minor road. Design The freeway itself is grade-separated from the minor road, one crossing the other over a bridge. Approaching the ...

with U.S. Route 218 and

Iowa Highway 27 O scale (or O gauge) is a scale commonly used for toy trains and rail transport modelling. Introduced by German toy manufacturer Märklin around 1900, by the 1930s three-rail alternating current O gauge was the most common model railroad sc ...

, the Avenue of the Saints highway. In Plainfield, Iowa 188 crosses over the Cedar River. It continues due east for , ending at U.S. Highway 63 north of

History

Iowa 188 was designated in 1945 as a route which connected US 218 at Plainfield to US 63. It first appeared on the state highway map in 1946. Four years later, the highway absorbed Iowa 53, which connected Clarksville to Iowa 10. Until 1963, the highway appeared very much like it does today. That year the section of highway between Clarksville and Plainfield was turned over to Butler County officials and the section south of Clarksville became Iowa 122. Just three years later, the Iowa State Highway Commission changed course and reabsorbed Iowa 122. Since then the routing has not changed.

Major intersections

References

External links

{{Attached KML 188