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

FAU-6011 (1st Ave.

Good

Over: First Creek

1st ave & 9th St., LaSalle, IL

Built 2018 Load: 42.8 t ADT: 1,100

TR 18

Good

Over: BUGABOO CK

4.75 MI S CHAUNCEY, Lawrence, IL

Built 2022 Load: 42.8 t ADT: 50

ROCKY FORD RD

Good

Over: SALT CR

5 W 1.5 MI S LINCOLN, Logan, IL

Built 1985 Load: 42.8 t ADT: 350

IL 143

Good

Over: Indian Creek

3.5 M NW Edwardsvill, Madison, IL

Built 2018 Load: 42.8 t ADT: 10,500

TR 95 McCoy Road

Good

Over: Rocky Branch

1.5 Mi NW Moro, Madison, IL

Built 2020 Load: 42.8 t ADT: 300

FAS 567 (CH 20)

Good

Over: Quiver Creek

0.43 mi W FAS 571, Mason, IL

Built 2022 Load: 42.8 t ADT: 1,300

HILLTOP DRIVE

Good

Over: WOODS CREEK

.2M.N.HUNT.ALGQN.RD., McHenry, IL

Built 1985 Load: 42.8 t ADT: 1,600

FAS 484 CH 14

Good

Over: BRANCH MONEY CREEK

0.5 MI E TOWANDA, McLean, IL

Built 1934 Load: 42.8 t ADT: 1,100

CH 23

Good

Over: BRUSHY FORK CR

3 M WNW WOODSON, Morgan, IL

Built 2010 Load: 42.8 t ADT: 125

TR 190

Good

Over: WHITE WALNUT CR

3.5 MI NE P'VILLE, Perry, IL

Built 1994 Load: 42.8 t ADT: 150

IL 10 (FAP 721)

Good

Over: MADDEN CREEK

.5 MI E OF LODGE, Piatt, IL

Built 1931 Load: 42.8 t ADT: 1,950

TR 170

Good

Over: TRIB NORTH LAKE

3.0 MI NW ATWOOD, Piatt, IL

Built 2019 Load: 42.8 t ADT: 50

IL 146-FAP 885

Good

Over: MILLER CREEK

W OF WCL GOLCONDA, Pope, IL

Built 2002 Load: 42.8 t ADT: 1,550

ILL 37

Good

Over: STREAM

0.3 MI N OLMSTD SPUR, Pulaski, IL

Built 2004 Load: 42.8 t ADT: 1,100

I-55 (SB)

Good

Over: FANCY CREEK

1M N SHERMAN INTCHG, Sangamon, IL

Built 1962 Load: 42.8 t ADT: 14,600

I-55 W FR/W OUTER

Good

Over: FANCY CREEK

1M N SHERMAN INTCHG, Sangamon, IL

Built 1959 Load: 42.8 t ADT: 950

TR 5

Good

Over: Sugar Creek

0.44 mi W TR 70, Sangamon, IL

Built 2019 Load: 42.8 t ADT: 20

TR 171(Oak Crest R

Good

Over: TRIB to Clear Lake

1.3 M SE of Riverton, Sangamon, IL

Built 2020 Load: 42.8 t ADT: 175

Rel. IL 3 (Packers

Good

Over: KCSRR, Water St, UPRR

0.6 mi W. of I-70, St. Clair, IL

Built 2016 Load: 42.8 t ADT: 2,350

FAS 60 (CH 5)

Good

Over: BRANCH BROWN CREEK

3.0 MI SE DAKOTA, Stephenson, IL

Built 2023 Load: 42.8 t ADT: 900

SCHOOL STREET

Good

Over: CEDAR CREEK

S EDGE OF WINSLOW, Stephenson, IL

Built 2019 Load: 42.8 t ADT: 75

POWERTON RD CH 16

Good

Over: LOST CREEK

W JCT ILL 29 CH 16, Tazewell, IL

Built 1984 Load: 42.8 t ADT: 4,550

FAS 331(CH 10)

Good

Over: STREAM

N CITY LIMITS E LYNN, Vermilion, IL

Built 2010 Load: 42.8 t ADT: 300

TR 42A

Good

Over: STREAM

0.5 MI S ARMSTRONG, Vermilion, IL

Built 2021 Load: 42.8 t ADT: 35

TR 216 Peach Tree

Good

Over: Herzog Branch

1 Mi NE of Hoyleton, Washington, IL

Built 2016 Load: 42.8 t ADT: 50

1675 N

Good

Over: LOST CREEK TRIB

1 MI N ENFIELD, White, IL

Built 2020 Load: 42.8 t ADT: 50

1750 E

Good

Over: CROOKED CREEK

2 MI SE CROSSVILLE, White, IL

Built 2020 Load: 42.8 t ADT: 25

MOLINE RD

Good

Over: DEER CREEK

3 MI SW I-88, Whiteside, IL

Built 1952 Load: 42.8 t ADT: 1,400

HERRIN ROAD

Good

Over: TRIB TO POND CREEK

0.75M E HERRIN, Williamson, IL

Built 2016 Load: 42.8 t ADT: 6,200

PERRYVILLE ROAD

Good

Over: S BR KISHWAUKEE RIV.

0.3 MI N BLACKHAWK, Winnebago, IL

Built 1971 Load: 42.8 t ADT: 3,200

FAS-40 (YEALE BR R

Good

Over: SUGAR CREEK

6 MI NE DURAND, Winnebago, IL

Built 2022 Load: 42.8 t ADT: 575

PIERCE AVE

Good

Over: NW DRAINAGEWAY

0.05 MI E OF ROCKTON, Winnebago, IL

Built 1962 Load: 42.8 t ADT: 350

TR 122

Good

Over: CREEK

3.1 MI E MARCELLENE, Adams, IL

Built 1963 Load: 43.1 t ADT: 125

S SCENIC BLUFF ROA

Good

Over: BRANCH OF PLUM RIVER

2 MI SE SAVANNA, Carroll, IL

Built 2017 Load: 43.1 t ADT: 50

US 40(FAS 1707)

Good

Over: BIG CREEK

E OF MARSHALL, Clark, IL

Built 1994 Load: 43.1 t ADT: 5,150

GROVE ST

Good

Over: W FK N BR CHI RIV

WEST OF IL-43, Cook, IL

Built 1993 Load: 43.1 t ADT: 1,450

Devonaire Pkwy

Good

Over: Btwn Detention Pds

0.1 mi. N of S.malta, DeKalb, IL

Built 2003 Load: 43.1 t ADT: 1,350

TR 136 A

Good

Over: SCATTERING FORK

3.9 MI SW OF CAMARGO, Douglas, IL

Built 2020 Load: 43.1 t ADT: 50

CH41 (GRANDRIDGE R

Good

Over: MURRAY SLOUGH

0.03 MI W OF TR 128, Grundy, IL

Built 2022 Load: 43.1 t ADT: 800

FAP 776/IL 242

Good

Over: STREAM

4.3 MI S WAYNE CO LI, Hamilton, IL

Built 2002 Load: 43.1 t ADT: 1,250

IL 81

Good

Over: BNRR

.05MI E OF BENGSTON, Henry, IL

Built 2016 Load: 43.1 t ADT: 1,900

US 45/52

Good

Over: Trib to Langan Creek

3.51 M N of US 52, Iroquois, IL

Built 2019 Load: 43.1 t ADT: 3,650

US 20

Good

Over: TRIB TO SMALL POX CR

.58MI NW GLEN HOLLOW, Jo Daviess, IL

Built 2009 Load: 43.1 t ADT: 5,750

TR 354A

Good

Over: OTTER CREEK

E 21ST N 1440, LaSalle, IL

Built 1926 Load: 43.1 t ADT: 50

TR-72

Good

Over: TRIB RACCON CK

3 MI SW BRIDGEPORT, Lawrence, IL

Built 1996 Load: 43.1 t ADT: 35

TR 69

Good

Over: Gooseberry Creek

2.0 Mi. NW of Emingt, Livingston, IL

Built 2020 Load: 43.1 t ADT: 50

TR 210

Good

Over: CREEK

2710 N, 2300 E, Livingston, IL

Built 1985 Load: 43.1 t ADT: 25

BL 55/ OLD 66 NB

Good

Over: SALT CREEK

1.9 S IL 10 LINCOLN, Logan, IL

Built 2014 Load: 43.1 t ADT: 4,650

TR 90 (Bearsdale R

Good

Over: Lake Fork Creek

3.0 Mi. W Maroa, Macon, IL

Built 2021 Load: 43.1 t ADT: 50

CH 24

Good

Over: Otter Creek

0.27 mi S TR 113, Macoupin, IL

Built 2020 Load: 43.1 t ADT: 400

Showing 23,951-24,000 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.