Interstate 380 Auxiliary route of the Interstate Highway System
Maintained by IADOT
Iowa's Interstate Highways with I-380 highlighted in red.
Length:	73.05 mi[1] (117.56 km)
Formed:	1973-1985
South end:	I-80 / US 218 / IA 27 near Iowa City
Major junctions:	US 30 in Cedar Rapids US 20 in Black Hawk
North end:	US 218 in Waterloo
Iowa State Highways < IA 376 IA 386 >

Interstate 380 (abbreviated "I-380") is a 73-mile (117 km) spur route located in eastern Iowa. From Interstate 80 and U.S. Highway 218 in rural Johnson county, it stretches north and northwest to Waterloo, serving to connect both Cedar Rapids and Waterloo—Iowa's second- and fifth-largest cities—to the Interstate Highway System.

Except for the last 1½ miles between U.S. Highway 20 and its northern terminus at Mitchell Avenue in Waterloo, I-380 runs concurrent with Iowa Highway 27 as part of the 560-mile (900 km) Avenue of the Saints connecting St. Louis, Missouri with St. Paul, Minnesota.

[edit] Route description

Interstate 380 begins in Johnson County, Iowa, just west of Coralville and Iowa City when northbound U.S. 218 crosses Interstate 80 flanked by a tight, cloverleaf interchange (“tight” because each year, a few big rigs overturn in the midst of negotiating its southwest loop ramp). At this point, U.S. 218 takes a back seat as I-380 becomes the primary route for the next 71 miles (114 km) on the Avenue of the Saints. As I-380 is part of the Avenue of the Saints, it is cosigned as Iowa Highway 27 .

Thirteen miles into its northward course, and shortly after crossing into Linn County, I-380 passes to the east of the Eastern Iowa Airport and enters the city of Cedar Rapids where, after the U.S. 30 interchange, it will wind through downtown and offer some ten to twelve exits (depending on how they're counted) to serve greater Cedar Rapids. I-380 crosses the Cedar River in downtown Cedar Rapids.

Just beyond Cedar Rapids and Hiawatha, the County Home Road exit 28 serves the towns of Toddville and Robins and Interstate 380 veers northwestward toward Center Point. Soon thereafter, it clips the corners of Benton and Buchanan counties before entering Black Hawk County, the last of five to be visited on the journey.

Three miles over the Black Hawk County line, northbound I-380 turns due west near mile-marker 65 as it joins westbound U.S. 20 for approximately six miles. After parting ways with U.S. 20, the Avenue of the Saints and IA 27, I-380 heads northward for its last mile-and-a-half. Just beyond mile-marker 73, Interstate 380 meets its northern terminus in Waterloo at Mitchell Avenue, where it continues as US 218 to Cedar Falls and beyond.

[edit] Exit list

County	Location	#	Destinations	Notes
Johnson	Coralville, Tiffin		US 218 south / IA 27 south – Mt. Pleasant, Keokuk	Southbound exit and northbound entrance
		0	I-80 – Davenport, Iowa City, Des Moines	Signed as exits 0A (east) and 0B (west)
	North Liberty	4	CR F28 – North Liberty
	Shueyville	10	CR F12 – Swisher, Shueyville
Linn	Cedar Rapids	13	Ely, Cedar Rapids Airport
		16	US 30 / US 151 / US 218 north – Mt. Vernon, Tama	North end of US 218 overlap; signed as exits 16A (east) and 16B (west) northbound
		17	33rd Avenue Southwest - Hawkeye Downs
		18	Wilson Avenue Southwest
		19A	To US 151 Bus. / Diagonal Drive / 5th Avenue Southwest – Downtown Cedar Rapids	Northbound exit and southbound entrance; former IA 94
		19B	US 151 Bus. (1st Avenue West)  – Veterans Memorial Stadium, Kingston Stadium	Southbound exit and northbound entrance
		19C	1st Street West	Northbound exit and southbound entrance
		20A	To US 151 Bus. / 1st Street East – Downtown Cedar Rapids	Southbound exit and northbound entrance; former IA 94
		20B	7th Street East - U.S. Cellular Center
		21	H Avenue, J Avenue
		22	Coldstream-29th Street, Glass Road-32nd Street
		23	42nd Street	Southbound exit is via exit 24
		24	IA 100 (Collins Road) / Blairs Ferry Road	Signed as exits 24A (IA 100) and 24B (Blairs Ferry Road) northbound
	Hiawatha
		25	Boyson Road
		28	CR E34 – Toddville, Robins
	Center Point	35	CR W36 – Center Point
Benton	Urbana	41	Urbana
		43	IA 150 – Vinton, Independence
Buchanan		49	Brandon
		55	CR V65 – Jesup
Black Hawk
		62	CR D38 – Gilbertville
		65	US 20 east – Dubuque	South end of US 20 overlap
		66	Raymond, Gilbertville
	Evansdale	68	Evansdale Drive - Elk Run Heights
		70	River Forest Road
	Waterloo	71A	US 218 south – La Porte City	South end of US 218 overlap
			US 20 west / IA 27 north – Cedar Falls	North end of US 20/IA 27 overlap
		72	San Marnan Drive

[edit] References

[edit] External links

• Iowa Highways - Interstate 380
• Interstate 380 Iowa @ Interstate-Guide.com

v • d • e Auxiliary routes of Interstate 80 California: 180 (former) • 280 • 380 • 480 (former) • 580 • 680 • 780 • 880 • 880 (former) • 980 — Nevada: 580 (unsigned) — Wyoming: 180 — Nebraska: 180 • 280 (former) • 480 • 580 (former) • 680 — Iowa: 280 • 380 • 480 • 680 — Illinois: 180 • 280 — Ohio: 280 • 480 • 680 — Pennsylvania: 180 • 180 (former) • 280 (former) • 380 • 480 (former) • 680 (former) — New Jersey: 280 • 680 (former)