State profile · Near national median SD

Illinois bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Illinois — drawn straight from the FHWA National Bridge Inventory.

27,743
Public bridges
41.2%
Good condition
7.9%
Poor condition
7.9%
Structurally deficient

Total Bridges

27,743

Public highway bridges in Illinois

Good Condition

41.2%

11,426 bridges rated 7-9

-8.8pp vs 50% benchmark

Poor Condition

7.9%

2,186 bridges rated 0-4

Structurally Deficient

7.9%

2,186 bridges flagged for repair priority

0.9pp vs national avg 7.0%

Illinois vs national bridge condition

Illinois — Good condition share 41.2%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Illinois — Structurally deficient share 26.3%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Bridge inventory deck-condition mix — Illinois (FHWA NBI)

Illinois41.185163825109036%36.47046101719353%7.879465090293047%7.879465090293047%GoodFairPoorStructurally Deficient
Bridge inventory deck-condition mix — Illinois (FHWA NBI)

Counties (102)

Adams 325 Alexander 96 Bond 165 Boone 111 Brown 71 Bureau 382 Calhoun 81 Carroll 185 Cass 77 Champaign 743 Christian 323 Clark 232 Clay 171 Clinton 187 Coles 308 Cook 2185 Crawford 196 Cumberland 169 De Witt 197 DeKalb 264 Douglas 234 DuPage 380 Edgar 278 Edwards 79 Effingham 260 Fayette 356 Ford 300 Franklin 323 Fulton 210 Gallatin 82 Greene 166 Grundy 269 Hamilton 164 Hancock 291 Hardin 58 Henderson 144 Henry 331 Iroquois 565 Jackson 235 Jasper 180 Jefferson 270 Jersey 111 Jo Daviess 198 Johnson 120 Kane 354 Kankakee 352 Kendall 133 Knox 321 LaSalle 529 Lake 286 Lawrence 183 Lee 372 Livingston 578 Logan 296 Macon 368 Macoupin 248 Madison 543 Marion 301 Marshall 153 Mason 85 Massac 138 McDonough 210 McHenry 229 McLean 624 Menard 90 Mercer 162 Monroe 130 Montgomery 261 Morgan 241 Moultrie 171 Ogle 377 Peoria 365 Perry 139 Piatt 249 Pike 338 Pope 86 Pulaski 106 Putnam 50 Randolph 155 Richland 147 Rock Island 256 Saline 176 Sangamon 480 Schuyler 121 Scott 96 Shelby 330 St. Clair 502 Stark 89 Stephenson 332 Tazewell 361 Union 192 Vermilion 515 Wabash 88 Warren 202 Washington 232 Wayne 264 White 210 Whiteside 280 Will 674 Williamson 204 Winnebago 475 Woodford 222

Illinois vs nearby ranks

Adjacent states on the structurally deficient leaderboard (lower share = better)

States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Illinois on the same metric.

44

Rhode Island

7.69% top marginal rate
Structure
Progressive
Burden @ $100K
$78

31

Nebraska

7.73% top marginal rate
Structure
Progressive
Burden @ $100K
$15,571
Selected

17

Illinois

7.88% top marginal rate
Structure
Progressive
Burden @ $100K
$27,743

25

Massachusetts

7.96% top marginal rate
Structure
Progressive
Burden @ $100K
$5,314

29

Missouri

8.53% top marginal rate
Structure
Progressive
Burden @ $100K
$24,654

Bridges Needing Most Attention in Illinois

Six lowest-condition bridges in Illinois, ranked by composite NBI rating. Each is inspected at least every 24 months.

FAS 1599

Poor

Over: DRAINAGE CANAL

2.2 MI E MEYER, Adams, IL

Built 1980 Load: 0.6 t ADT: 200

CH 15

Poor

Over: E FK MAZONRIVER

0.05 MI W CH 16, Grundy, IL

Built 1977 Load: 1.0 t ADT: 1,400

MOOSE RD - TR 240

Structurally Deficient

Over: WILSON CREEK

NE-35-T3NR2E, Fulton, IL

Built 1935 Load: 1.3 t ADT: 10

TR 10-B

Structurally Deficient

Over: KING CREEK

W EDGE OF MINERAL, Bureau, IL

Built 1899 Load: 1.6 t ADT: 10

TR-6

Structurally Deficient

Over: DRAINAGE DITCH

3.5 MI NE DIETERICH, Effingham, IL

Built 1909 Load: 1.6 t ADT: 25

TR208K(TWIN BRIDGE

Structurally Deficient

Over: BIG CREEK

NE EDGE MT ZION, Macon, IL

Built 1967 Load: 1.9 t ADT: 375

All Bridges in Illinois

WYSOX ROAD

Good

Over: OTTER CREEK

3 MI W MILLEDGEVILLE, Carroll, IL

Built 1985 Load: 36.0 t ADT: 25

TR 287

Good

Over: LITTLE VERMILION DIT

2 MI N BROADLANDS, Champaign, IL

Built 1967 Load: 36.0 t ADT: 125

TR 5 A

Good

Over: DOYLES CREEK

5.5 MI ENE WESTFIELD, Clark, IL

Built 1997 Load: 36.0 t ADT: 50

TR-170

Good

Over: BEAR CREEK

3.5 MI SW FLORA, Clay, IL

Built 1980 Load: 36.0 t ADT: 50

IL 161

Good

Over: KASKASKIA R OVERFLOW

3.6 M EAST BARTELSO, Clinton, IL

Built 1994 Load: 36.0 t ADT: 2,250

MDWY UPPER LEVEL R

Good

Over: LOWER LEVEL ROAD

5600 S & 9800 W, Cook, IL

Built 1998 Load: 36.0 t ADT: 8,400

FAP-781 (ILL-33)

Good

Over: STREAM

6 MI SE PALESTINE, Crawford, IL

Built 1989 Load: 36.0 t ADT: 750

FAS-1695 (CH-13)

Good

Over: HUTSON CREEK

4 MI E EATON, Crawford, IL

Built 1931 Load: 36.0 t ADT: 425

TR 52

Good

Over: STREAM

3.7MI NE WAYNESVILLE, De Witt, IL

Built 1988 Load: 36.0 t ADT: 50

FAS 523(CH 5)

Good

Over: JORDAN SLOUGH

4.5 N OF NEWMAN, Douglas, IL

Built 1983 Load: 36.0 t ADT: 450

FAP 323(US 36)

Good

Over: STREAM

4 MI W OF NEWMAN, Douglas, IL

Built 1991 Load: 36.0 t ADT: 2,100

TR 57

Good

Over: SALT FORK

1.5 MI N SCOTTLAND, Edgar, IL

Built 1974 Load: 36.0 t ADT: 50

TR-251

Good

Over: BISHOP CREEK

3.5 MI SW ELLIOTSTOW, Effingham, IL

Built 2002 Load: 36.0 t ADT: 100

IL 54/FAP 71A

Good

Over: DRUMMER CREEK

1.37mi SW IL 9/47, Ford, IL

Built 1992 Load: 36.0 t ADT: 1,150

ILL 54

Good

Over: STREAM

5.8 ML N OF IL 9, Ford, IL

Built 1996 Load: 36.0 t ADT: 1,650

TR 91 PATTON

Good

Over: STREAM

1280E 500N, Ford, IL

Built 1978 Load: 36.0 t ADT: 200

CH 26 STEVE'S RD

Good

Over: TRIB BIG FOUR DITCH

120N,1500E, Ford, IL

Built 2009 Load: 36.0 t ADT: 250

CH 26 STEVE'S RD

Good

Over: TRIB BIG FOUR DITCH

120N,1500E, Ford, IL

Built 2009 Load: 36.0 t ADT: 250

FAP 869-IL 14

Good

Over: UNNAMED ANDY CR TRIB

E OF CHRISTOPHER ECL, Franklin, IL

Built 2001 Load: 36.0 t ADT: 5,250

CH 14

Good

Over: PRAIRE CK

JIM BROWNING RD, Franklin, IL

Built 1979 Load: 36.0 t ADT: 450

IL 267

Good

Over: TAYLOR CREEK

0.1 M N ROCKBRIDGE, Greene, IL

Built 2009 Load: 36.0 t ADT: 2,400

BLAIRSVILLE RD

Good

Over: STREAM

NEXT TO IL 242, Hamilton, IL

Built 2018 Load: 36.0 t ADT: 1,500

FAS-881

Good

Over: TRIB RECTOR CREEK

2 MI W WALPOLE, Hamilton, IL

Built 1971 Load: 36.0 t ADT: 325

ILL ROUTE 82

Good

Over: SPRING CREEK

3 MI N OF CAMBRIDGE, Henry, IL

Built 1975 Load: 36.0 t ADT: 1,800

IL 49 FAP 840

Good

Over: Drainage Ditch

0.48 Mi N of US 24, Iroquois, IL

Built 2015 Load: 36.0 t ADT: 2,300

TR 371A

Good

Over: TRIB TO GAY CREEK

0.5 MI W RTE 1, Iroquois, IL

Built 1983 Load: 36.0 t ADT: 50

FAP 832(IL49)

Good

Over: STREAM

3 MI N ILL-33, Jasper, IL

Built 2001 Load: 36.0 t ADT: 1,000

ILL 100

Good

Over: OTTER CREEK

2.3 M S JCT ILL 16, Jersey, IL

Built 1938 Load: 36.0 t ADT: 950

IL 78

Good

Over: DRAINAGE DITCH

2 MI N CARROLL CO LN, Jo Daviess, IL

Built 1992 Load: 36.0 t ADT: 600

TR 225

Good

Over: BAY CREEK

SE1/4 SEC36 T13S R4E, Johnson, IL

Built 1989 Load: 36.0 t ADT: 25

SILVER GLEN ROAD

Good

Over: OTTER CREEK

0.8 MI W RANDALL RD, Kane, IL

Built 2019 Load: 36.0 t ADT: 9,800

CH 9/FAS 309

Good

Over: CANAVAN CREEK

4.9 MI E OF IL 50, Kankakee, IL

Built 1988 Load: 36.0 t ADT: 1,700

IL 47

Good

Over: MIDDLE AUX SABLE

2.97 Mi S of IL 71, Kendall, IL

Built 1993 Load: 36.0 t ADT: 8,100

COUNTY HIGHWAY 08

Good

Over: BRUSH CREEK

NE-8-T9NR2E, Knox, IL

Built 2021 Load: 36.0 t ADT: 400

CEDAR AVE

Good

Over: RAVINE

1.6 M N LAKE COOK RD, Lake, IL

Built 1957 Load: 36.0 t ADT: 275

IL 17

Good

Over: TRIB VERMILION RIVER

5.6 MI E OF 17 & 23, Livingston, IL

Built 1998 Load: 36.0 t ADT: 525

CH-1 2600N

Good

Over: GOOSEBERRY CREEK

2490E, 2600N, Livingston, IL

Built 2012 Load: 36.0 t ADT: 250

TR 51

Good

Over: TRIB KICKAPOO CR

2.8 M NW LAWNDALE, Logan, IL

Built 2012 Load: 36.0 t ADT: 175

ILL 4

Good

Over: HURRICANE CREEK

.9MI N CARLINVILLE, Macoupin, IL

Built 1996 Load: 36.0 t ADT: 2,900

FAI 70 EB

Good

Over: SUGAR FORK

3.5 M E ILL 4, Madison, IL

Built 1964 Load: 36.0 t ADT: 13,750

TR 303

Good

Over: EAST FORK SILVER CR

ON HICKORY FLAT RD, Madison, IL

Built 1993 Load: 36.0 t ADT: 175

IL 37 / FAU 8565

Good

Over: Town Creek

SALEM, Marion, IL

Built 2002 Load: 36.0 t ADT: 5,800

TR-188

Good

Over: DAVIDSON CREEK

1 MI SW TONTI, Marion, IL

Built 1980 Load: 36.0 t ADT: 75

FAS-2791

Good

Over: RACCOON CREEK

1.5 MI W WALNUT HILL, Marion, IL

Built 1987 Load: 36.0 t ADT: 375

TR 9A (TH-C54)

Good

Over: CROW CREEK

T13N-R9E-4PM SEC 1, Marshall, IL

Built 1981 Load: 36.0 t ADT: 100

FAS 956

Good

Over: DRY RIDGE DITCH

3.6 MI E US 45, Massac, IL

Built 1989 Load: 36.0 t ADT: 225

IL 23

Good

Over: KISHWAUKEE R OVERFLO

1.3 MI. N. US 20, McHenry, IL

Built 2009 Load: 36.0 t ADT: 6,450

ORLANDO AVE

Good

Over: PHEASANT CREEK

0.8 MI S. 55 & 51, McLean, IL

Built 1982 Load: 36.0 t ADT: 2,400

CH 10

Good

Over: PIKE CR

7 MI E GREENVIEW, Menard, IL

Built 1979 Load: 36.0 t ADT: 125

TR 113

Good

Over: Stream

Nokomis, Montgomery, IL

Built 2019 Load: 36.0 t ADT: 100

Showing 22,451-22,500 of 27,743 bridges

Related

All states → | National rankings → | Understanding conditions → | SD bridges explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges Editorial.

Disclaimer: This information is provided for informational purposes only and does not constitute professional advice. Data is sourced from the FHWA National Bridge Inventory (NBI). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.

Understanding Bridge Conditions

How FHWA rates bridge condition on a 0-9 scale.

Check Your Daily Bridges

How to look up bridge condition data for bridges on your route.

Read our methodology — how this data is sourced, computed, and verified.