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U.S. Highway 18: Wikis

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U.S. Route 18 shield
U.S. Route 18
Length: 1043 mi[1] (1,679 km)
Formed: 1926[1]
West end: I-25 at Orin, WY
Major
junctions:
I-29 near Worthing, SD

I-35 at Clear Lake, IA
I-39 / I-90 at Madison, WI

East end: Lincoln Memorial Drive in Milwaukee, WI
United States Numbered Highways
ListBanneredDividedReplaced

U.S. Route 18 (US 18) is an east–west U.S. highway in the Midwestern United States. The western terminus is in Orin, Wyoming at an interchange with Interstate 25. Its eastern terminus of US 18 is in downtown Milwaukee, Wisconsin.[2] However, US 18 runs concurrent with other U.S. routes from its western terminus to Mule Creek Junction, Wyoming.

US 18 is one of the original United States highways of 1926. The US 18 designation was originally proposed for a road in Michigan from Grand Haven east to Detroit. This roadway was eventually designated as U.S. Route 16.

Contents

Route description

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Wyoming

In Wyoming, US 18 runs concurrent with U.S. Highway 20 from Interstate 25 to Lusk, where US 18 branches off to run concurrently with U.S. Highway 85. At the unincorporated community of Mule Creek Junction in northeastern Niobrara County, US 18 leaves US 85. This ten-mile (16 km) stretch from US 85 to the South Dakota border is the only segment of US 18 in Wyoming which is not co-signed with another highway.

South Dakota

U.S. 18 enters South Dakota west of Edgemont. It passes through Hot Springs, the Pine Ridge Indian Reservation, the Rosebud Indian Reservation, Winner, and Gregory before crossing the Missouri River near Pickstown over the Fort Randall Dam. East of the Missouri River, U.S. 18 passes through (or near) Lake Andes and Tripp before a brief concurrency with Interstate 29 near Worthing. East of I-29, U.S. 18 passes through Canton before crossing the Big Sioux River into Iowa.

Legal definition

The South Dakota section of U.S. 18, other than the concurrency with Interstate 29, is defined at South Dakota Codified Laws § 31-4-141.[1]

Iowa

U.S. 18 enters Iowa via a Big Sioux River crossing northeast of Beloit. It overlaps U.S. Route 75 for a mile near Hull and U.S. Route 59 for a mile near Sanborn. It then overlaps U.S. Route 71 through Spencer. U.S. 18 passes through Emmetsburg before intersecting U.S. Route 169 at Algona. U.S. 18 then continues east through Garner before intersecting Interstate 35 in Clear Lake. After a brief concurrency with I-35, U.S. 18 continues as a freeway bypassing Mason City to the south. At Charles City, U.S. 18 becomes a rural two-lane highway again, except for a brief concurrency with the U.S. Route 63 bypass of New Hampton. After passing through West Union, it turns northeast and joins U.S. Route 52 at Postville, then leaving 52 about 7 miles (11 km) east of Monona before crossing the Mississippi River into Wisconsin via the Marquette-Joliet Bridge in the city of Marquette.

U.S. 18 is the designated route of the Avenue of the Saints between Clear Lake and Charles City.

Wisconsin

Upon entry into Wisconsin at Prairie du Chien, US 18 is the terminus for WIS 60. The two routes are then concurrent until Bridgeport where WIS 60 splits off to the east and US 18 crosses the Wisconsin River and turns east on the other side. The route joins the US 151 expressway in Dodgeville and the two remain concurrent east to Madison (See U.S. Route 151 in Wisconsin for an interchange list). US 18 follows US 12 south of Madison and passes through or around Cambridge, Jefferson and Waukesha before terminating in Milwaukee at the junction of East Michigan Street and Lincoln Memorial Drive in downtown.

See also

Bannered routes

Related U.S. Routes

References

US blank.svg Main U.S. Routes
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38
40 41 42 43 44 45 46 48 49 50 51 52 53 54 55 56 57 58 59
60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79
80 81 82 83 84 85 87 89 90 91 92 93 94 95 96 97 98 99
101 163 400 412 425
Lists  U.S. Routes - Bannered - Divided - Bypassed - Portal
Browse numbered routes
< US 16 WY US 20 >
< SD 17 SD SD 19 >
< IA 17 IA US 20 >
< WIS 17 WI WIS 19 >

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