Interstate 39

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"I-39" redirects here. For the Imperial Japanese Navy submarine, see Japanese submarine I-39.

Interstate 39 marker

Interstate 39
Template:Maplink-road
I-39 highlighted in red
Route information
Maintained by IDOT, ISTHA and WisDOT
Length: 306.14 mi[1] (492.68 km)
Existed: 1986 – present
Major junctions
South end: I-55 / US 51 in Normal, IL
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North end: US 51 / WIS 29 near Rothschild, WI
Location
States: Illinois, Wisconsin
Counties: IL: McLean, Woodford, Marshall, LaSalle, Lee, Ogle, Winnebago
WI: Rock, Dane, Columbia, Marquette, Waushara, Portage, Marathon
Highway system
Illinois State Highway System
← IL 38 IL US 40 →
← WIS 38 WI WIS 39 →

Interstate 39 (I-39) is a highway in the Midwestern United States. I-39 runs from Normal, Illinois at I-55 to Wisconsin Highway 29 (WIS 29) in the town of Rib Mountain, Wisconsin, which is approximately six miles (9.7 km) south of Wausau.[2] I-39 was designed to replace U.S. Route 51 (US 51), which in the early 1980s was one of the busiest two-lane highways in the United States.[citation needed] I-39 was built in the 1980s and 1990s.

In Illinois, the route has a total length of 140.82 miles (226.63 km).[3] In Wisconsin, I-39 has a distance of 182 miles (293 km). With the exception of an eight-mile (13 km) segment around Portage, the Interstate shares a route with at least one other route number in I-39's entirety. From Rockford to Portage, I-39 is concurrent with I-90. I-94 joins the pair in Madison until Portage. At 29 miles (47 km) in length, this concurrency of three Interstates is the longest in the country. From Portage northward, US 51 is co-signed with the Interstate and has exit numbers based on its mileage.

Route description

Illinois

Aerial view of I-39 as it passes Minonk, Illinois, April 2012

In Illinois, I-39 begins at Interstate 55, north of the Bloomington-Normal, Illinois, area alongside of Route 251. It runs north largely through rural areas from the city of Normal. About 55 miles (89 km) north of the city, I-39 crosses the Illinois River over the Abraham Lincoln Memorial Bridge, which is 2,170.8 metres (1.3 mi) long.[4] Just north of the Illinois River, I-39 runs east of the cities of LaSalle and Peru before intersecting I-80. North of I-80, the wind turbines of the Mendota Hills Wind Farm can be seen from milepost 72 at Mendota north to near Paw Paw. I-39 intersects I-88 in Rochelle. Further north, I-39 crosses the Kishwaukee River before meeting US 20 on the south side of Rockford. I-39 then runs east concurrently with US 20 to where the Interstate joins the Jane Addams Memorial Tollway and I-90 near Cherry Valley. I-39.I-90 head north to South Beloit. There is a toll plaza just south of Rockton Road. US 51 leaves I-39/I-90 at Illinois Route 75 (IL 75) in South Beloit, while I-39/I-90 continues north into Wisconsin.

For all but one mile (1.6 km) that I-39 is in Illinois, it is designated concurrently with US 51. The southern terminus of I-39 is less than one mile (1.6 km) from I-74 as it runs around Normal.

Wisconsin

I-39 enters from Illinois along with I-90, passing under Stateline Road (County Trunk Highway P, CTH-p), and bypasses Beloit to the east. East of the town, the route has a cloverleaf interchange that serves as the terminus for both WIS 81—which heads westward into Beloit—and I-43—which provides access to Milwaukee.[5] That cloverleaf interchange is currently under construction to make it a more free flowing interchange for I-43 traffic.[citation needed] I-39/I-90 has three interchanges (including one in Illinois) that serves Beloit. The I-39/90 concurrency continues to the north and is joined by WIS 11 about seven miles (11 km) north of the I-43 interchange. The highway bypasses Janesville to the east, although interchanges with US 14 and WIS 26 provide access to the town. There are four exits that serve Janesville. The highway continues generally to the north, crossing the Rock River before an interchange with WIS 59 that provides access to Edgerton to the west, and Milton to the southeast.[5] Subsequently, the highway enters Dane County as it passes west of Lake Koshkonong. It is joined by US 51 from Edgerton and serves as the southern terminus of WIS 73. US 51 leaves the route four miles (6.4 km) to the north and heads west through Stoughton. The Interstate gradually turns westward around Utica to an interchange with CTH-N, providing access to Stoughton and Cottage Grove. It then turns gradually back to the north and meets US 12 and US 18 in Madison. I-39/I-90 bypasses Madison to the east, and I-94 joins the concurrency at the eastern terminus of WIS 30, an interchange known as the Badger Interchange.[6] About two miles (3.2 km) to the north, the highway crosses US 151, which includes a south-side access to High Crossing Boulevard. The last two Madison area interchanges are US 51 three miles (4.8 km) northwest of the US 151 interchange and WIS 19 another mile northwest of the US 51 interchange. Access is provided to CTH-V just west of DeForest four miles (6.4 km) further north. I-39/I-90/I-94 enters Columbia County four miles (6.4 km) north-northwest of CTH-V.[5]

I-39/US 51 in northern Wisconsin

The Interstate crosses WIS 60 at an interchange three miles (4.8 km) north of the county line east of Lodi and CTH-CS at another interchange four miles (6.4 km) further north near Poynette. The highway crosses the Wisconsin River four miles (6.4 km) north of CTH-CS. At three miles (4.8 km) further along the route from the river, I-39 leaves the concurrency with I-90 and I-94 and turns northward while the other two Interstates turn northwest. WIS 78 terminates at this interchange and heads southwest. This is the starting point of the segment of freeway that carries the I-39 route alone. The Interstate crosses WIS 33, the first of three interchanges accessing Portage, two miles (3.2 km) north of I-90/I-94. After crossing the Wisconsin River again, I-39 crosses the second interchange—this one with WIS 16 and turns northeast to an interchange with US 51. The US Highway joins the Interstate, and both turn north once again and leave the Portage area and, after four miles (6.4 km), enter Marquette County.[5]

WIS 23 joins I-39/US 51 northbound, 4 miles (6.4 km) from the county line. The three highways pass along Buffalo Lake and encounter a south-side half interchange with CTH-D in the town of Packwaukee. WIS 23 leaves the concurrency to the east heading toward Montello at WIS 82 near Oxford, and the freeway takes a due north route to pass Westfield. I-39/US 51 enters Waushara County six miles (9.7 km) north of Westfield.[5] Four miles (6.4 km) north of the county line, I-39/US 51 junction with WIS 21 in Coloma. I-39/US 51 meets an interchange in Hancock with CTH-V five miles (8.0 km) further north, and WIS 73 crosses in Plainfield after another five miles (8.0 km). This is two miles (3.2 km) south of the Portage County line.[5] In Portage County, I-39/US 51 takes a due north trajectory, which provides access to CTH-D, CTH-W and WIS 54 (also Business US 51) over 12 miles (19 km). The WIS 54 interchange and the CTH-B interchange a mile and a half (2.4 km) north of it provide access for Plover. The next four interchanges—CTH-HH, US 10 eastbound/WIS 66 westbound, Stanley Street and Business US 51 provide access to Stevens Point. Amongst these interchanges, the freeway turns northwestward, bypassing the city to the east and north. I-39/US 51 crosses two more interchanges while in Portage County: Casimir Road four miles (6.4 km) northwest of Stevens Point,[7] and westbound US 10 two miles (3.2 km) north of Casimir Road. The freeway then parallels the Wisconsin River for six miles (9.7 km) to an interchange with CTH-DB east of Lake DuBay and one mile (1.6 km) south of the Marathon County line.[5]

WIS 34 terminates at an interchange with I-39/US 51 in Knowlton three miles (4.8 km) northwest of the freeway's entry into Marathon County; the freeway turns due north from this interchange. WIS 153 crosses the freeway four miles (6.4 km) further north in Mosinee. Maple Ridge Road crosses after another two miles (3.2 km) as the freeway turns northeastward into Kronenwetter.[8] An interchange with Business US 51 is just south of the Wisconsin River crossing after four miles (6.4 km) from Maple Ridge Road. I-39 ends two miles (3.2 km) further north at the interchange with WIS 29 east just southwest of Wausau. US 51 continues north on the freeway after WIS 29 towards Merrill.[5]

History

Illinois

When the Interstate Highway System was first being planned, Illinois made a request for a north–south highway from South Beloit to Salem. The project was deemed a low priority and was shelved. US 51, which ran mostly down the middle of the state, became a heavily traveled two-lane arterial road, experiencing many crashes and earning the nickname "Killer 51".[citation needed]

In the late 1960s and early 1970s, a major supplemental freeway system plan was proposed, with the goal of providing Illinois residents access to freeways within 30 minutes or less. One of the proposed routes, FAP 412, was a route that would extend from US 20 in Rockford to I-57 just north of Salem, similar to the earlier requested route. Due to traffic counts, only the portion between Rockford and Decatur was prioritized.[9]

Over the course of the 1970s, planning for the US 51 supplemental freeway took place in earnest. However, debate ensued over what type of highway should be built. IDOT wanted the entire highway built to Interstate Highway standards, but a transportation committee established to review the proposed supplemental freeway system recommended only Interstate construction between Rockford and I-80.[10] The highway from Oglesby south to Decatur was recommended to be an at-grade expressway, utilizing the existing road where possible. After a decade of lobbying by interest groups, it was announced in 1986 that US 51 would be rebuilt to Interstate standards from Oglesby to Normal.[11] However, due to funding concerns and local opposition, it was decided that the Bloomington to Decatur segment would not be built to Interstate standards; this segment was made a four lane expressway.[12]

The first segment of the freeway opened 1984 from IL 5 (now I-88) in Rochelle, to US 20 in Rockford.[13] When the freeway was completed south from IL 5 to I-80 in 1986, IDOT officially requested an Interstate designation for the new highway, and I-39 was officially designated.[14] By December 1987, construction on the section of I-39 between I-80 and IL 251 was finished. The next section, between IL 251 and I-55 in Bloomington-Normal, was completed by 1992, although this stretch of the highway was opened in several phases as completed.[15] In December 1989, the section from Bloomington–Normal to Hudson opened, a distance of about 4.4 miles (7.1 km).[16] In early September 1992, another segment opened from IL 116 north to IL 17.[17]

Wisconsin

In Wisconsin, the highway was officially designated in 1992.[18] In October 1993, AASHTO established part of I-39 in its northern section between Rockford and Rib Mountain, Wisconsin, then designated I-39 along existing portions of I-90, I-94, and US 51. However, this part of the highway was not marked as I-39 for another four years, primarily because the Wisconsin Department of Transportation had to reconstruct the interchange connecting I-90 and I-94 with WIS 78 near Portage.[19] Signs denoting I-39 were placed along the highway in Wisconsin until 1996, when the section between Portage and Rib Mountain (near Wausau) received its signs.[18] This occurred after then Governor Tommy Thompson designated the stretch between Portage and Wausau in 1996 after a five-year push to get the Interstate designation approved.[19] The remaining segment along I-90/I-94 was not signed for I-39 until late 1998[18] The section between the I-90/I-94 interchange and US 51's interchange in Portage was previously a part of WIS 78. That route was truncated back to its current terminus when the Interstate's designation went into effect.[20] The designation of I-39 violated Wisconsin's rule of not having any state trunk highway number duplicated—Interstate, US or state—as WIS 39 already existed.[18]

Exit list

State County Location mi[21] km Exit[22] Destinations Notes
Illinois McLean Normal 0.00 0.00 — I-55 / US 51 south to I-74 – Chicago, St. Louis, Decatur, Peoria, Champaign Southern terminus of I-39; southern end of US 51 concurrency; I-55 exit 164; Central Illinois Regional Airport
1.53 2.46 2
US 51 Bus. south (Main Street) – Bloomington, Normal
Hudson 4.67 7.52 5 CR 12 (Franklin Street) – Hudson
​ 7.75 12.47 8 IL 251 north / CR 8 (Lake Bloomington Road) – Kappa Southern terminus of IL 251
Woodford El Paso 14.35 23.09 14 US 24 – Peoria, El Paso
Woodford 22.37 36.00 22 IL 116 – Peoria, Pontiac
Minonk 26.94 43.36 27 CR 2 – Minonk
Marshall Wenona 35.02 56.36 35 IL 17 – Lacon, Wenona
LaSalle Lostant 41.60 66.95 41 IL 18 – Henry, Streator
Tonica 48.67 78.33 48 CR 54 (Reed Richardson Road) – Tonica
​ 51.70 83.20 51 IL 71 – Hennepin, Oglesby, Granville
​ 52.47 84.44 52 IL 251 – Peru, LaSalle
Oglesby 53.79 86.57 54 Invalid type: road – Oglesby
Illinois River Abraham Lincoln Memorial Bridge
La Salle 56.75 91.33 57 US 6 (5th Street) – LaSalle, Peru, Ottawa
​ 58.68–
59.46		 94.44–
95.69		 59 I-80 – Chicago, Des Moines, LaSalle, Peru Signed as exits 59A (east) and 59B (west); I-80 exit 79
Troy Grove 66.16 106.47 66 US 52 – Troy Grove
Mendota 72.09 116.02 72 US 34 – Mendota, Earlville
Lee Paw Paw 82.57 132.88 82 CR 10 (Chicago Road) – Paw Paw
​ 87.34 140.56 87 US 30 – Sterling, Rock Falls, Aurora
Steward 93.34 150.22 93 CR 2 (Perry Road) – Steward
Ogle Rochelle 97.10–
97.79		 156.27–
157.38		 97
I-88 / IL 110 (CKC) (Ronald Reagan Memorial Tollway) – Moline, Rock Island, Chicago		 Signed as exits 97A (east) and 97B (west); I-88 exit 78
99.46 160.07 99 IL 38 / Lincoln Highway – DeKalb, Rochelle
​ 104.50 168.18 104 IL 64 – Sycamore, Oregon
Monroe Center 110.98 178.60 111 IL 72 – Genoa, Byron, Kingston
Winnebago ​ 115.49 185.86 115 CR 11 (Baxter Road)
Rockford 119.05–
119.56		 191.59–
192.41		 — US 20 west (Rockford Bypass) – Rockford, Freeport Southern end of US 20 concurrency; Chicago Rockford International Airport
Cherry Valley 122.17 196.61 122A US 20 east – Belvidere Northern end of US 20 concurrency
122B Harrison Avenue
122.90 197.79 —
I-90 east (Jane Addams Memorial Tollway) – Chicago		 Southern end of I-90 concurrency; I-90 exit 17; I-39 uses I-90's exit numbers from here north
Rockford 124.45 200.28 15
US 20 Bus. (State Street)		 Last free exit northbound
127.77 205.63 12 CR 55 west (East Riverside Boulevard) Toll on northbound exit and southbound entrance
Machesney Park 131.31 211.32 9 IL 173 (West Lane Road) – Machesney Park Toll on northbound exit and southbound entrance
Rockton 136.71 220.01 South Beloit Toll Plaza 1
South Beloit 137.53 221.33 3 CR 9 (Rockton Road) Last free exit southbound; northwestern end of Jane Addams Memorial Tollway
139.93 225.20 1 US 51 north / IL 75 – South Beloit Northern end of US 51 concurrency
  140.25
0.00		 225.71
0.00		 Illinois–Wisconsin state line
Wisconsin Rock Town of Turtle 2.48 3.99 185B I-43 north – Milwaukee I-43 exit 1
2.46 3.96 185A WIS 81 west (Milwaukee Avenue) – Beloit
4.78 7.69 183 CTH-S (Shopiere Road)
Town of La Prairie 9.95 16.01 177 WIS 11 west (Avalon Road) – Janesville, Avalon Southern end of WIS 11 concurrency; Southern Wisconsin Regional Airport
Janesville 12.49 20.10 175
Alt. I-39 north / WIS 11 east (Racine Street) – Delavan		 Northern end of WIS 11 concurrency; former Bus. US 14
15.61–
15.66		 25.12–
25.20		 171B
Alt. I-39 south / US 14 – Janesville		 Formerly split into exits 171B (west) and 171C (east)
16.41 26.41 171A WIS 26 – Milton
Town of Fulton 24.62 39.62 163 WIS 59 – Edgerton, Milton, Whitewater
Dane Town of Albion 27.60 44.42 160 US 51 south / WIS 73 / WIS 106 – Edgerton, Deerfield Southern end of US 51 concurrency
Town of Christiana 31.30 50.37 156 US 51 north – Stoughton Northern end of US 51 concurrency
Town of Pleasant Springs 40.40 65.02 147 CTH-N – Stoughton, Cottage Grove
Town of Blooming Grove 45.54 73.29 142 US 12 / US 18 (Beltline Highway) – Madison, Cambridge Signed as exits 142A (west) and 142B (east); US 12 exit 267
Madison 49.39 79.49 138B WIS 30 west – Madison Left exit and entrance northbound; serves Dane County Airport; WIS 30 exit 3 eastbound and exit 240A westbound
49.74 80.05 138A I-94 east – Milwaukee Left exit and entrance southbound; southern end of I-94 concurrency; I-94 exit 240
51.74 83.27 135C High Crossing Boulevard Northbound exit and southbound entrance
51.96–
52.00		 83.62–
83.69		 135B US 151 north – Sun Prairie Cloverleaf interchange
135A US 151 south – Madison
Town of Burke 55.20 88.84 132 US 51 (Stoughton Road) – Madison, De Forest
Community of Windsor 56.68 91.22 131 WIS 19 – Waunakee, Sun Prairie
Town of Vienna 60.93 98.06 126 CTH-V – Dane, De Forest
Columbia Town of Arlington 67.97 109.39 119 WIS 60 – Lodi, Arlington, Columbus
Town of Dekorra 71.99 115.86 115 CTH-CS – Poynette, Lake Wisconsin
Town of Caledonia 78.63 126.54 — I-90 west / I-94 west – Wisconsin Dells Northern end of I-90/I-94 concurrency; I-90 exit 108B
79.26 127.56 84 WIS 78 south – Merrimac Signed as exit 108A northbound
79.73 128.31 85 Cascade Mountain Road
Portage 81.73 131.53 87 WIS 33 (Cook Street) – Portage, Baraboo
84.13 135.39 89 WIS 16 (Wisconsin Street) to WIS 127 – Portage, Wisconsin Dells, Columbus Signed as exits 89A (east) and 89B (west) northbound
Town of Fort Winnebago 85.79 138.07 92 US 51 south (New Pinery Road) – Portage Southern end of US 51 concurrency; exit numbers from here north based on US 51's mileposts
Marquette Town of Moundville 94.43 151.97 100 WIS 23 west / CTH-P – Wisconsin Dells, Endeavor Southern end of WIS 23 concurrency
Town of Oxford 98.61 158.70 104 CTH-D – Packwaukee Northbound exit and southbound entrance
100.77 162.17 106 WIS 23 east / WIS 82 west – Oxford, Montello, Princeton Northern end of WIS 23 concurrency
Westfield 107.32 172.71 113 CTH-E / CTH-J – Westfield, Harrisville, Princeton
Waushara Coloma 118.29 190.37 124 WIS 21 – Coloma, Necedah, Wautoma, Oshkosh, Tomah
Town of Hancock 125.35 201.73 131 CTH-V – Hancock
Town of Plainfield 130.94 210.73 136 WIS 73 – Plainfield, Wisconsin Rapids, Wautoma, Nekoosa
Portage Town of Pine Grove 134.07 215.76 139 CTH-D – Almond
137.56 221.38 143 CTH-W – Bancroft, Wisconsin Rapids
Town of Plover 145.91 234.82 151 WIS 54 (Post Road) / Bus. US 51 – Wisconsin Rapids, Plover, Waupaca
Village of Plover 147.51 237.39 153 CTH-B (Plover Road) – Wisconsin Rapids, Plover, Amherst
150.53 242.25 156 CTH-HH (McDill Avenue) – Whiting, Stevens Point
Stevens Point 152.71 245.76 158 US 10 east / WIS 66 west (Main Street) – Stevens Point, Waupaca, Appleton, Marshfield Southern end of US 10 concurrency; southern end of WI 66 concurrency; signed as exits 158A (east) and 158B (west) northbound
153.94 247.74 159 WIS 66 east (Stanley Street) – Stevens Point, Rosholt Northern end of WI 66 concurrency
155.76 250.67 161 Bus. US 51 (Division Street) – Stevens Point
Hull 157.63 253.68 163 Casimir Road To CTH-X
159.75 257.09 165 US 10 west – Marshfield Northern end of US 10 concurrency
CTH-X Former diamond interchange; removed for construction of US 10 exit
Town of Dewey 165.39 266.17 171 CTH-DB – Knowlton, Lake DuBay
Marathon Town of Knowlton 169.64 273.01 175 WIS 34 (Balsam Road) – Knowlton, Wisconsin Rapids
Mosinee 173.57 279.33 179 WIS 153 – Mosinee, Elderon Central Wisconsin Airport
Kronenwetter 175.39 282.26 181 Maple Ridge Road
Rothschild 179.52 288.91 185 Bus. US 51 – Rothschild, Kronenwetter
Town of Rib Mountain 182.14 293.13 187 WIS 29 east – Weston, Green Bay
US 51 north / WIS 29 west – Wausau, Chippewa Falls		 Northern terminus;[23] northern end of US 51 concurrency; freeway continues as US 51/WIS 29
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also

References

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  8. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  9. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  10. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  11. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  12. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  13. ↑ Lua error in package.lua at line 80: module 'strict' not found.[unreliable source?]
  14. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  15. ↑ Lua error in package.lua at line 80: module 'strict' not found.[unreliable source?]
  16. ↑ Lua error in package.lua at line 80: module 'strict' not found.[full citation needed]
  17. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  18. ↑ 18.0 18.1 18.2 18.3 Lua error in package.lua at line 80: module 'strict' not found.[unreliable source?]
  19. ↑ 19.0 19.1 Lua error in package.lua at line 80: module 'strict' not found.
  20. ↑ Lua error in package.lua at line 80: module 'strict' not found.[unreliable source?]
  21. ↑ Wisconsin State Trunk Highway Logs:
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  22. ↑ Lua error in package.lua at line 80: module 'strict' not found.
  23. ↑ Lua error in package.lua at line 80: module 'strict' not found.

External links

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