Iowa Highway 188 is a state highway in north-central Iowa. 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 south of Clarksville and ends at U.S. Route 63 near Tripoli.
Iowa Highway 188 begins at a T intersection with Iowa Highway 3 2 + 1â„2 miles (4.0 km) south o ... more
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