Roads of the Mid-South & West > Highways of the State of Illinois > Double Number U.S. Federal Highways of Illinois > U.S. Federal Route 51, Illinois > U.S. Federal Route 51; Winnebago County, Illinois

U.S. Federal Route 51
Winnebago County

U.S. Federal Route 51 runs north-south through Winnebago County. Through this county, U.S. Rt. 51 is on several expressways. Along the eastside of the Rockford-Metro, this highway passes along the Jane Addams Memorial Tollway.

U.S. Rt. 51 passes through the following towns in Winnebago County.
Roscoe
Machesney Park

Loves Park
Rockford

Cherry Valley

U.S. Rt. 51 is multi-plexed in Winnebago County.
Illinois State Route 75, near South Beloit.

Interstate 39, from near South Beloit to the Ogle/Winnebago County Line.

Interstate 90, from near South Beloit to Cherry Valley.

U.S. Rt. 20, from Cherry Valley to Rockford.


U.S. Rt. 51 crosses the following highways in Winnebago County.
Illinois State Route 75, near South Beloit.
Illinois State Route 251, near South Beloit.
Interstate 39, near South Beloit.
Interstate 90, near South Beloit.

Illinois State Route 75, near South Beloit.
Illinois State Route 173, at Machesney Park. (NO INTERCHANGE)
BUSN. U.S. Rt. 20, at Rockford.
Interstate 90, at Cherry Valley.
U.S. Rt. 20, at Cherry Valley.

U.S. Rt. 20, at Rockford.


Toll plazas on U.S. Rt. 51 in Winnebago County.

Cherry Valley Plaza #3, Cherry Valley PLAZA REMOVED

NB I-39/U.S. Rt. 51 near the Cherry Valley toll plaza. (Sept. 2003)

NB I-39/U.S. Rt. 51 at the Cherry Valley toll plaza. (Sept. 2003)

Plaza name plate.

Toll price chart.
South Beloit Palza #1, South Beloit.

Toll warning sign on NB I-39/U.S. Rt. 51/WB I-90. (Sept. 2003)

Lane markers over NB I-39/U.S. Rt. 51/WB I-90. (Sept. 2003)

Stop ahead marker. (Sept. 2003)

NB I-39/U.S. Rt. 51/WB I-90 at the South Beloit plaza. (Sept. 2003)

The first toll wrning sign on SB I-39/U.S. Rt. 51; EB I-90.

A lane marking sign on SB I-39/U.S. Rt. 51; EB I-90.

The stop ahead sign on SB I-39/U.S. Rt. 51; EB I-90.

The first toll warning sign on SB I-39/U.S. Rt. 51; EB I-90. (April, 2007)

The half mile sign for the toll plaza on SB I-39/U.S. Rt. 51; EB I-90. (April, 2007)

The lane markers near the plaza on SB I-39/U.S. Rt. 51; EB I-90. (April, 2007)

SB I-39/U.S. Rt. 51; EB I-90 at the divide for the I-PASS and Cash lanes. (April, 2007)

SB I-39/U.S. Rt. 51; EB I-90 at the South Beloit Plaza. (April, 2007)

SB I-39/U.S. Rt. 51; EB I-90 at the I-PASS Lanes. (April, 2007)

The one mile warning sign on SB I-39/U.S. Rt. 51; EB I-90. (July, 2015)

The half mile sign on SB I-39/U.S. Rt. 51; EB I-90. (July, 2015)

The lane markers for the SB I-39/U.S. Rt. 51; EB I-90. (July, 2015)

The stop ahead sign on SB I-39/U.S. Rt. 51; EB I-90 (July, 2015)

The South Beloit Plaza. (July, 2015)

The I-Pass lanes on SB I-39/U.S. Rt. 51; EB I-90. (July, 2015)

The price chart on SB I-39/U.S. Rt. 51; EB I-90. (July, 2015)
On December 2nd, 2003 the Illinois State Toll Highway Authority released a press release on the future of the Cherry Valley Toll Plaza and the South Beloit Toll Plaza, both along the Northwest Tollway. Illinois State Govenor Rod Blagojevich announced in Rockford that the southbound exit toll at the Cherry Valley Toll Plaza would be eliminated by the end of 2003. To make up for the lose revenue. The toll at the South Beloit Plaza would be raised from $0.40 to $0.50. Also, new I-PASS lanes would be added to the South Beloit Plaza. These would be similar to one currently on Interstate 355, North-South Tollway. Work on that project should start in Spring 2004.



NB I-39/U.S. Rt. 51 at the Ogle/Winnebago County Line.

SB I-39/U.S. Rt. 51 south of Baxter Road.

NB I-39/U.S. Rt. 51 south of Rockford.

SB I-39/U.S. Rt. 51 south of U.S. Rt. 20.

NB I-39/U.S. Rt. 51 one mile from U.S. Rt. 20.

NB I-39/U.S. Rt. 51 near U.S. Rt. 20.

WB U.S. Rt. 20 at SB I-39/U.S. Rt. 51.

A BGS on SB I-39/U.S. Rt. 51; WB U.S. Rt. 20.

Another BGS on SB I-39/U.S. Rt. 51; EB I-90.

A BGS on WB I-90.

SB I-39/U.S. Rt. 51 at I-90.

SB I-39/U.S. Rt. 51 at EB I-90.

EB I-90; SB I-39/U.S. Rt 51 at Cherry Valley.
Photo from: Paul Dienhart

SB I-39/U.S. Rt. 51; EB I-90 south of BUSN U.S. Rt. 20.

A SB guide marker.

A BGS on SB I-39/U.S. Rt. 51; EB I-90.

SB I-39/U.S. Rt. 51; EB I-90 at BUSN U.S. Rt. 20.

SB I-39/U.S. Rt. 51; EB I-90 near Rockford.

A BGS on SB I-39/U.S. Rt. 51; EB I-90.

A BGS on SB I-39/U.S. Rt. 51; EB I-90.

NB I-39/U.S. Rt. 51/WB I-90 northwest of Rockford.

SB I-39/U.S. Rt. 51; EB I-90 at IL St Rt 173.

SB I-39/U.S. Rt. 51; EB I-90 at the start of the Addams Tollway.

A guide marker on EB Winnebago County Highway 9.

BGS on the ISTHA portion of NB I-39/U.S. Rt. 51/WB I-90.

BGS on the IDOT portion of NB I-39/U.S. Rt. 51/WB I-90.

A junction marker on SB U.S. Rt. 51/EB IL St Rt 75.

A junction marker on WB IL St Rt 75.

SB U.S. Rt. 51 at the Illinois Welcome sign near South Beloit.

SB U.S. Rt. 51 at the Illinois Welcome sign. (December, 2013)

24 July 2015