Iowa Highway 12

Infobox road
state=IA
type=IA
route=12
alternate_name=


length_mi=39
length_round=0
length_ref=Iowahighwaysref|lowrg=10|hirng=19|num=12|access_date=November 9, 2007]
established=July 1, 1920
direction_a=South
starting_terminus= ("signed")
junction= overlap between Westfield and Akron
direction_b=North
ending_terminus=
counties=Woodbury, Plymouth, Sioux
cities=Sioux City, Westfield, Akron, Chatsworth, Hawarden
previous_type=IA
previous_route=10
next_type=IA
next_route=13

Iowa Highway 12 is a state highway that runs from north to south in northwestern Iowa. Highway 12 is a short state highway in Iowa, with a length of 39 miles (63 kilometers) long. The highway lies east of the Big Sioux River, which separates Iowa from South Dakota, for its length.

Termini

The official southern terminus of Iowa Highway 12 is in eastern Sioux city at U.S. 20 and U.S. 75, though the signed southern terminus of is in Sioux City at an interchange with Interstate 29. The northern terminus of Iowa 12 is in Hawarden at an intersection with Iowa Highway 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.Iowahighwaysref|lowrg=10|hirng=19|num=12|access_date=November 9, 2007]

Major intersections

Jctint
state=IA
county=Woodbury
cspan=4
location=Sioux City
lspan=4
type=
mile=
road=Jct|state=IA|US|20|US|75
notes=Southern terminusJctint
state=IA
type=
mile=
road=Jct|state=IA|US-Bus|75|dab1=Sioux City|name1=Lewis Boulevard
notes=Jctint
state=IA
type=mplex
mile=
road=Jct|state=IA|I|29|dir1=South|US|77|dir2=South|name2=Wesley Parkway|US-Bus|20
notes=Jctint
state=IA
type=mplex
mile=
road=Jct|state=IA|I|29|dir1=North
notes=Signed south end of Jct|state=IA|IA|12 Jctint
state=IA
county=Plymouth
cspan=3
location=Westfield
lspan=
type=mplex
mile=
road=Jct|state=IA|IA|3|dir1=West
notes=Jctint
state=IA
location=Akron
lspan=2
type=mplex
mile=
road=Jct|state=IA|IA|3|dir1=East|name1=South Street
notes=Jctint
state=IA
type=decomd
mile=
road=Jct|state=SD|SD|48|to1=48
notes=Former Jct|state=IA|IA|403 Jctint
state=IA
county=Sioux
cspan=
location=Hawarden
lspan=
type=
mile=
road=Jct|state=IA|IA|10|dir1=North|name1=Avenue E|IA|10|dir2=South|name2=10th Street|noshield2=10
notes=Northern Terminus

References