“Iowa Highway 12”的意思、由来-开放百科全书

词条

Iowa Highway 12

释义

Route description
History
Major intersections
References

{{Infobox road
|state=IA
|type=IA
|route=12
|map={{maplink|frame=yes|plain=yes|frame-align=center|frame-width=290|frame-height=290|frame-lat=42.717856|frame-long=-96.506102|zoom=9|type=line|raw={{Wikipedia:Map data/Wikipedia KML/Iowa Highway 12}}}}
|map_custom=yes
|map_notes=Iowa 12 highlighted in red
|length_mi=46.212
|length_ref=^[1]
|established=1920
|tourist=Loess Hills Scenic Byway
|direction_a=South
|terminus_a={{Jct|state=IA|US|20|US|75}} at Sioux City
|junction={{plainlist|

{{Jct|state=IA|I|29|US|77|}} at Sioux City
{{Jct|state=IA|IA|3}} between Westfield and Akron

}}
|direction_b=North
|terminus_b={{Jct|state=IA|IA|10}} in Hawarden
|counties={{flatlist|

Woodbury
Plymouth
Sioux

}}
|previous_type=IA
|previous_route=10
|next_type=IA
|next_route=13
}}

Iowa Highway 12 (Iowa 12) is a {{convert|46.212|mi|km|adj=mid|-long}} state highway that runs from north to south in northwestern Iowa. The highway begins in eastern Sioux City at U.S. Highway 20 (US 20) and US 75. For the first {{convert|7+1/2|mi|spell=in}} of the route, Iowa 12 is an unsigned highway. The first {{convert|5|mi|spell=in}} are signed only as U.S. Highway 20 Business; the other {{convert|2+1/2|mi|spell=in}} are overlapped by Interstate 29 (I-29). From here, the highway lies just east of the Big Sioux River, which separates Iowa from South Dakota. The northern end of Iowa 12 is in Hawarden at an intersection with Iowa 10.

Route description

Iowa Highway 12 begins at U.S. 20 and U.S. 75 signed as Business US 20. It continues west through Sioux City and becomes concurrent with Interstate 29 going west to Riverside Boulevard, where signage begins. It follows Riverside Boulevard while it passes through the Riverside neighborhood in Sioux City. It passes past Stone State Park in northwestern Sioux City and continues northwest towards Westfield. It turns northeast to enter Westfield, then intersects Iowa Highway 3. Iowa 12 and Iowa 3 overlap and go northeast to Akron, where Iowa 3 turns east. Iowa 12 continues northeast through Chatsworth and ends at Iowa 10 in Hawarden.

History

Iowa Highway 12 was designated as a state highway in 1920. It originally went between Hamburg and Akron. It was shortened to Missouri Valley in 1924, and Sioux City in 1926. In 1931, it was extended north to Hawarden. In 1958, it was shortened to its intersection with I-29, but then in 1979, was extended east along I-29 and the newly formed Business Route 20 to end at the new U.S. 20 bypass in eastern Sioux City. In 2000, signage for this extension was removed and signage for Iowa 12 ended at I-29, though officially, Iowa 12 continues east through Sioux City.

Major intersections

{{Jcttop|exit}}{{IAint|exit
|county=Woodbury
|cspan=6
|township1=Concord
|township2=Woodbury
|ctdab=Woodbury
|type=concur
|mile=0.000
|road={{Jct|state=IA|US-Bus|20|dab1=Sioux City|dir1=begins|US|20|US|75|location1=South Sioux City}}
|notes=Southern terminus; southern end of US 20 Business overlap; US 75 south exit 93, US 20 east exit 4B
}}{{IAint|exit
|espan=2
|location=Sioux City
|lspan=5
|mile=3.269
|exit=
|road={{Jct|state=IA|US-Bus|75|dab1=Sioux City|name1=Lewis Boulevard}}
|notes=Interchange
}}{{IAint
|type=concur
|mile=
|road={{Jct|state=IA|I|29|dir1=South}}
|notes=Southern end of I-29 overlap; I-29 exit 147
}}{{IAint|exit
|type=concur
|mile=4.723
|exit=148
|road={{Jct|state=IA|US|77|dir1=South|name1={{Jct|state=IA|US-Bus|20|dab1=Sioux City|dir1=west|noshield=yes}}|road=Wesley Parkway north|location1=South Sioux City Nebr.}}
|notes=Exit numbers follow I-29; southern end of US 20 Business overlap; southbound access via exit 149
}}{{IAint|exit
|mile=5.311
|exit=149
|road={{Jct|state=IA|to1=To|US|77|dir1=South|name1={{Jct|state=IA|US-Bus|20|dab1=Sioux City|dir1=west|noshield=yes}}|road=Hamilton Boulevard|location1=Riverfront}}

Wesley Parkway north – South Sioux City
|notes=Northbound signed as Hamilton Boulevard only}}{{IAint|exit
|espan=3
|type=concur
|mile=7.527
|road={{Jct|state=IA|I|29|dir1=North|location1=Sioux Falls}}
|notes=Northern end of I-29 overlap; I-29 exit 151; IowaDOT signs this as southern end of Iowa 12
}}{{IAint
|county=Plymouth
|cspan=3
|township=Westfield
|ctdab=Plymouth
|type=concur
|mile=28.359
|road={{Jct|state=IA|IA|3|dir1=West|location1=Vermillion S.D.}}
|notes=Southern end of Iowa 3 overlap
}}{{IAint
|location=Akron
|lspan=2
|type=concur
|mile=33.094
|road={{Jct|state=IA|IA|3|dir1=East|name1=South Street|road=Loess Hills Scenic Byway ends|city1=Le Mars}}
|notes=Northern end of Iowa 3 overlap
}}{{IAint|exit
|mile=33.861
|espan=2
|road={{Jct|state=SD|I|29|SD|48|to1=To}} / Big Sioux River Road – Alcester
}}{{IAint
|county=Sioux
|location=Hawarden
|mile=46.212
|road={{Jct|state=IA|IA|10|location1=Beresford SD|city2=Orange City}}
|notes=Northern terminus; road continues as Iowa 10 west (Avenue E north)}}{{Jctbtm|exit|keys=concur}}

References

1. ^{{IowaDOT|2015-07-17|year=2014}}

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