U.S. Route 6 (US 6) or U.S. Highway 6 (US 6), also called the Grand Army of the Republic Highway, honoring the American Civil War veterans association, is a main route of the United States Numbered Highway System. While it currently runs east-northeast from Bishop, California, to Provincetown, Massachusetts, the route has been modified several times. The highway's longest-lasting routing, from 1936 to 1964, had its western terminus at Long Beach, California. During this time, US 6 was the longest highway in the country.
U.S. Route 275 (US 275) is a north–south United States highway that is a branch of US 75. It originally terminated at US 75 in Council Bluffs, Iowa. The highway's northern terminus is in O'Neill, Nebraska, at an intersection with U.S. Highway 20 and U.S. Highway 281. Its southern terminus is near Rock Port, Missouri, at an intersection with U.S. Highway 136.
Iowa Highway 17 is a 103-mile-long (166 km) north–south state highway that traverses primarily rural areas in central and north-central Iowa. Iowa 17's southern end is near Granger in Dallas County at a freeway interchange with Iowa Highway 141, and its northern terminus is at an intersection with U.S. Highway 18 at the Kossuth-Hancock county line near Wesley.
Iowa Highway 13 is a north–south highway in eastern Iowa. It has a length of 85+1⁄4 miles (137.2 km). The southern terminus of Iowa Highway 13 is at U.S. Highway 30 (US 30) south of Bertram and southeast of Cedar Rapids. The northern terminus is at US 52 in rural Clayton County near the towns of Monona and Farmersburg near the intersection of US 52 and US 18.
Route 101 is a short highway in southern Missouri. The route begins at the Arkansas–Missouri state line as a continuation of Arkansas Highway 101, and travels northeastward. It travels through the city of Bakersfield, intersecting Route 142. The road then continues north to its northern terminus at U.S. Route 160 in Caulfield. The route was designated in 1941, after a supplementary route was renumbered.
Arkansas Highway 37 is a designation for three state highways in Arkansas. One segment of 20.9 miles (33.6 km) runs from Highway 17 north of McCrory north to Highway 14 in Amagon. A second segment of 31.9 miles (51.3 km) runs from Highway 14 east of Amagon north to Highway 122 at Cord. A third segment of 0.61 miles (0.98 km) runs from U.S. Route 62 in Gateway north to the Missouri state line.
Iowa Highway 5 is a highway in southern Iowa. It is a north–south highway with a length of 105 miles (169 km). It is the northernmost segment of a three-state "Highway 5" also involving Missouri Route 5 and Arkansas Highway 5. Portions of the highway are freeway and expressway. It had previously been designated Iowa Highway 60. The southern terminus of Iowa Highway 5 is at the Missouri border southwest of Cincinnati. Its northern terminus is at Interstate 35 at West Des Moines.
Iowa Highway 136 is a state highway maintained by the Iowa Department of Transportation. It runs for 87.611 miles (140.996 km) in eastern Iowa. It begins at the Mississippi River in Clinton on the Mark Morris Memorial Bridge, where it continues as Illinois Route 136. It ends at an interchange with U.S. Highway 20 (US 20) and US 52 in Dyersville. Although signed as a north–south highway throughout, the highway runs east to west between Clinton and Oxford Junction, while turning north at Oxford Junction to complete its run to Dyersville. For most of its existence, Iowa 136 connected Clinton and Luxemburg. During the 1950s-1960s, the northern and southern ends of the route shifted slightly because nearby United States highways changed their alignments. The northern end of Iowa 136 shifted again in early 2022.
Iowa Highway 2 is a 251-mile-long (404 km) state highway which runs across the southernmost tier of counties in the U.S. state of Iowa. At no point along its route is Iowa 2 more than 15 miles (24 km) from the Missouri state line, except for a small section near its eastern terminus. Iowa 2 stretches across the entire state; from the Missouri River near Nebraska City, Nebraska, to U.S. Highway 61 (US 61) at Fort Madison. Prior to becoming a primary highway, the route was known as the Waubonsie Trail.
Iowa Highway 8 is a state highway that runs from east to west in east central Iowa. Highway 8 is a short state highway in Iowa, at only 14 miles (23 km) long. Iowa 8 begins at an intersection with U.S. Highway 63 in Traer and ends at an intersection with U.S. Highway 218 northwest of Garrison. The route has largely remained the same since its designation.
Iowa Highway 38 is a 98-mile-long (158 km) state highway that runs through eastern Iowa. Iowa 38 begins at Iowa Highway 92 in Muscatine and ends at Iowa Highway 3 near Greeley.
Iowa Highway 92 (Iowa 92) is a state highway that runs from east to west across the state of Iowa. Iowa 92 is 279 miles (449 km) long and is part of a continuous 886-mile (1,426 km) four-state "Highway 92" which begins in Torrington, Wyoming, goes through Nebraska and Iowa and ends in La Moille, Illinois. It begins at the Missouri River in Council Bluffs, where it is a continuation of Nebraska Highway 92. It stretches across the state and serves to roughly demarcate the southern one-third of Iowa. It ends at the Mississippi River in Muscatine where it continues into Illinois as Illinois Route 92. Iowa 92 was designated in 1939 replacing the entirety of the original Iowa 2.
Iowa Highway 39 is a north–south state highway in western Iowa. It begins at an intersection with U.S. Route 59 and Iowa Highway 141 on the western edge of Denison. The route ends at its intersection with Iowa Highway 175 on the eastern side of Odebolt.
Iowa Highway 60 is a north–south state highway in northwest Iowa. The highway runs at a southwest-to-northeast angle. The southern end of Iowa Highway 60 is near Le Mars at a freeway interchange with U.S. Highway 75 and U.S. Highway 75 Business. Its northern end is at the Minnesota border just south of Bigelow, Minnesota, where the highway continues in Minnesota as Minnesota State Highway 60.
Iowa Highway 58 is a state highway that runs from north to south in northeast Iowa. A five-and-a-half-mile (8.9 km) portion of the highway is overlapped by the Avenue of the Saints. Iowa 58 begins at U.S. Highway 63 (US 63) in Hudson and ends at an interchange with US 218 and Iowa 57. Iowa 58's route has changed many times in its history, but has always served Black Hawk County.
Iowa Highway 110 is a north–south state highway in northwestern Iowa. It is 15 miles (24 km) long. Iowa 110 begins at U.S. Highway 20 south of Schaller and ends in Storm Lake at Iowa Highway 7.
Iowa Highway 333 (Iowa 333) is a short highway in southwestern Iowa. It serves as a connector route between Interstate 29 (I-29) and U.S. Highway 275 (US 275) in Hamburg. Formerly spanning two counties, Iowa 333 is one of the shortest state highways in Iowa.
Iowa Highway 15 (Iowa 15) was a short state highway in Van Buren County. It ran from the Missouri state line, where it connected to Route 15 to Iowa 2 in Milton. The highway was designated on January 1, 1969, when the Iowa State Highway Commission renumbered several state highways in order to match up with adjoining highways in neighboring states. The route ceased to exist on July 1, 2003, when the Iowa Department of Transportation turned over 700 miles (1,100 km) of state highways that mostly served local traffic. While it was in service, there were two Iowa 15s in the state; the other was significantly longer and located in the northern part of the state thus avoiding confusion between the two routes.
Iowa Highway 60 was a 223-mile-long (360 km) state highway that ran from the Missouri state line near Cincinnati, where it continued as Route 5, to U.S. Highway 18 (US 18) near Wesley. The highway passed through Centerville, Knoxville, Des Moines, and Webster City during its trek. It was an original state highway that was in service for 48 years. The highway originally only extended from Des Moines to Goldfield, but was extended in 1931. At that time, it absorbed Iowa Highway 6. On January 1, 1969, the highway ceased to exist. The Iowa State Highway Commission renumbered several state highways in order to match up route numbers with adjacent state highways. It was replaced by Iowa 5 south of Des Moines and Iowa 17 north of Granger.
U.S. Highway 59 (US 59) is a United States Highway that transverses the western third of Iowa. It begins at the Missouri state line southwest of Northboro and travels north in a zigzag pattern through Shenandoah, Avoca, Denison, and Cherokee. It ends at the Minnesota state line east of Bigelow, Minnesota. The highway was designated in 1934, though a concerted effort of community officials along today's route sought to bring a U.S. Highway to their cities for several years prior to US 59's creation.
Route 202 at Coatsville, Mo. 
Iowa 2 near Moulton 
