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

S MAIN ST

Fair

Over: PANTHER CK OVRFLOW

0.2 MI EAST ILL 78, Cass, IL

Built 1984 Load: 24.3 t ADT: 175

NORTH MAIN ST(CH 1

Fair

Over: E BR EMBARRAS RIVER

BROADLANDS, Champaign, IL

Built 1932 Load: 24.3 t ADT: 425

TR 225

Fair

Over: KASKASKIA DITCH

4.8 MI W SAVOY, Champaign, IL

Built 1969 Load: 24.3 t ADT: 150

TR 314

Fair

Over: STREAM

2.2 MI NW ROYAL, Champaign, IL

Built 1900 Load: 24.3 t ADT: 75

TR 12

Fair

Over: LONE TREE CREEK

0.5 MI SW LOTUS, Champaign, IL

Built 1968 Load: 24.3 t ADT: 100

TR 113 B

Fair

Over: STREAM

2.3 MI NW ROYAL, Champaign, IL

Built 1900 Load: 24.3 t ADT: 50

TR 946

Fair

Over: SALINE BRANCH

IN CRYSTAL LAKE PARK, Champaign, IL

Built 1900 Load: 24.3 t ADT: 350

E BYRON ST(MS 2600

Fair

Over: STREAM

IN SIDNEY, Champaign, IL

Built 1900 Load: 24.3 t ADT: 225

BROADWAY(MS 6540)

Fair

Over: BONEYARD CREEK

S OF UNIVERSITY AVE, Champaign, IL

Built 1900 Load: 24.3 t ADT: 3,000

TR 214-FAS 643

Fair

Over: DURBIN BRANCH

2 MI S OWANECO, Christian, IL

Built 1915 Load: 24.3 t ADT: 100

TR 2

Fair

Over: CLEAR CREEK

3.5MI SW OF SICILY, Christian, IL

Built 1965 Load: 24.3 t ADT: 125

TR 167

Fair

Over: SPRING CREEK

4 S OF STONINGTON, Christian, IL

Built 1962 Load: 24.3 t ADT: 50

BRIARCLIFF ROAD

Fair

Over: RIO BUENA VISTA

1 MI NW TAYLORVILLE, Christian, IL

Built 1969 Load: 24.3 t ADT: 650

TR 273

Fair

Over: DURBIN BRANCH

2 MI W MILLERSVILLE, Christian, IL

Built 1961 Load: 24.3 t ADT: 50

TR 151

Fair

Over: LIN BRANCH

3.5MI S STONINGTON, Christian, IL

Built 1953 Load: 24.3 t ADT: 125

TR 255

Fair

Over: UNION DR DIS #3 MAIN

5 N OF PANA, Christian, IL

Built 1955 Load: 24.3 t ADT: 50

TR 196A

Fair

Over: COTTON CREEK

4 MI W ROSAMOND, Christian, IL

Built 1941 Load: 24.3 t ADT: 200

TR 230

Fair

Over: LIN BRANCH

3.5 MI S STONINGTON, Christian, IL

Built 1951 Load: 24.3 t ADT: 35

MUNI 5001

Fair

Over: PANTHER CREEK

1MI W TAYLORVILLE, Christian, IL

Built 1960 Load: 24.3 t ADT: 700

TR 111A

Fair

Over: WALNUT HILL BRANCH

1.6 MI W SHARPSBURG, Christian, IL

Built 1953 Load: 24.3 t ADT: 250

TR 111A

Fair

Over: SHARP'S CREEK

SHARPSBURG, Christian, IL

Built 1953 Load: 24.3 t ADT: 150

TR 75B- MONT CO

Fair

Over: WEST BRANCH BUG R DD

1.5 MI E HARVEL, Christian, IL

Built 1983 Load: 24.3 t ADT: 75

TR 254

Fair

Over: LAKE FORK

3.1 MI NW PANA, Christian, IL

Built 1953 Load: 24.3 t ADT: 20

TR 232

Fair

Over: BUCKHART CREEK

0.8 MI SE STONINGTON, Christian, IL

Built 1983 Load: 24.3 t ADT: 50

TR 91

Fair

Over: BUCKHART CREEK

0.4 MI E STONINGTON, Christian, IL

Built 1983 Load: 24.3 t ADT: 125

TR 46

Fair

Over: STREAM

5.6 MI SE ASSUMPTION, Christian, IL

Built 1960 Load: 24.3 t ADT: 75

TR 46

Fair

Over: LAKE FORK TRIB

1.5 MI SE ASSUMPTION, Christian, IL

Built 1900 Load: 24.3 t ADT: 150

CH 8(FAS 688)

Fair

Over: E FORK EMBARRASS R

2.4 MI E WESTFIELD, Clark, IL

Built 1956 Load: 24.3 t ADT: 1,100

TR 134

Fair

Over: WILLOW CREEK

1.5 MI SE NEADMORE, Clark, IL

Built 1909 Load: 24.3 t ADT: 25

TR 327(FAS 2658)

Fair

Over: LITTLE WILLOW CREEK

4 MI NNE MOONSHINE, Clark, IL

Built 1909 Load: 24.3 t ADT: 75

TR 395

Fair

Over: STREAM

1.0 MI SE WEST UNION, Clark, IL

Built 1977 Load: 24.3 t ADT: 50

FAS 688(CH 8)

Fair

Over: N FORK EMBARRASS R

2.1 MI E WESTFIELD, Clark, IL

Built 1955 Load: 24.3 t ADT: 1,100

FAS-2820 (CH-1)

Fair

Over: RACCOON CREEK

2.9 MI S FLORA, Clay, IL

Built 1954 Load: 24.3 t ADT: 1,500

FAS-798

Fair

Over: PANTHER CREEK

1.5 MI SE HORD, Clay, IL

Built 1973 Load: 24.3 t ADT: 575

TR-144

Fair

Over: DISMAL CREEK

3 MI E IOLA, Clay, IL

Built 1977 Load: 24.3 t ADT: 50

TR-704

Fair

Over: LAKE DAM

CHARLIE BRWN FLORA, Clay, IL

Built 1932 Load: 24.3 t ADT: 125

TR 78/SHOAL CREEK

Fair

Over: HANOVER DITCH

3 MI SE GERMANTOWN, Clinton, IL

Built 1961 Load: 24.3 t ADT: 350

TR 298

Fair

Over: HOG BRANCH

N EDGE OAKLAND, Coles, IL

Built 1909 Load: 24.3 t ADT: 325

CH 13

Fair

Over: WHITLEY CREEK

3.0 MI NW MATTOON, Coles, IL

Built 1976 Load: 24.3 t ADT: 175

TR 4 A

Fair

Over: BOLIN BRANCH

5.0 MI NW COOKS MILL, Coles, IL

Built 1978 Load: 24.3 t ADT: 325

CH 20(FAS 661)

Fair

Over: STREAM

1 MI SE COOKS MILLS, Coles, IL

Built 1943 Load: 24.3 t ADT: 800

FAU 1603 (151st St

Fair

Over: TINLEY CREEK

1.64M.W.OF HARLEM AV, Cook, IL

Built 1948 Load: 24.3 t ADT: 15,400

167TH STREET

Fair

Over: CALUMET-UNION DRAIN

300 FT. E. OF I-294, Cook, IL

Built 1983 Load: 24.3 t ADT: 12,400

BRIARWOOD LANE

Fair

Over: SALT CR

0.5 E PLUM GR P18, Cook, IL

Built 1954 Load: 24.3 t ADT: 400

LAKE SHORE DR

Fair

Over: PEDESTRIAN UNDERPASS

3100N & 200W, Cook, IL

Built 1940 Load: 24.3 t ADT: 112,700

HUNTINGTON BLVD

Fair

Over: POPLAR CREEK

0.25 M S I90 P22, Cook, IL

Built 1972 Load: 24.3 t ADT: 1,625

I-90 SKYWAY

Fair

Over: GROUND SE INDIANA AV

0.08 M NW MARQ RDP7C, Cook, IL

Built 1958 Load: 24.3 t ADT: 28,700

LAKE SHORE DRIVE

Fair

Over: PEDESTRIAN UNDERPASS

600N 500E, Cook, IL

Built 1986 Load: 24.3 t ADT: 98,900

WASHINGTON STREET

Fair

Over: WELLER CREEK

0.5 M. S OF IL 58, Cook, IL

Built 1968 Load: 24.3 t ADT: 275

BURNING BUSH LANE

Fair

Over: MCDONALD CR

0.22 M N KNSNGTON P5, Cook, IL

Built 1963 Load: 24.3 t ADT: 1,100

Showing 5,201-5,250 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.