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 7144(WINDSOR R

Unknown

Over: I-57

SW OF CHAMPAIGN, Champaign, IL

Built 2012 ADT: 25,800

FAU 7110(Bradley A

Unknown

Over: I-57

W of Champaign, Champaign, IL

Built 2019 ADT: 34,400

FAP 719 (US 150)

Unknown

Over: FAI 57

I-57 UNDER US 150, Champaign, IL

Built 2020 ADT: 34,400

FAU 7158 (MATTIS A

Unknown

Over: FAI 57

I-57 & MATTIS AVE, Champaign, IL

Built 2020 ADT: 23,000

FAU 7158(MATTIS AV

Unknown

Over: FAI 74

2.5 MI NW CHAMPAIGN, Champaign, IL

Built 2020 ADT: 31,500

UP RR

Unknown

Over: TR 340

1.6 MI NE ROYAL, Champaign, IL

Built 1900 ADT: 225

IC RR

Unknown

Over: FAU 7118

UNIVERSITY AVE, Champaign, IL

Built 1900 ADT: 12,800

IC RR

Unknown

Over: LOGAN ST

LOGAN ST, Champaign, IL

Built 1900 ADT: 900

IC RR

Unknown

Over: LOGAN ST

LOGAN ST, Champaign, IL

Built 1900 ADT: 900

IC RR

Unknown

Over: LOGAN ST

LOGAN ST, Champaign, IL

Built 1900 ADT: 900

IC RR

Unknown

Over: FAU 7126(GREEN ST)

GREEN ST, Champaign, IL

Built 1900 ADT: 8,400

IC RR

Unknown

Over: FAU 7134(STADIUM DR)

STADIUM DR, Champaign, IL

Built 1900 ADT: 2,400

IC RR

Unknown

Over: FAU 7139(ST MARY'S)

ST MARY'S RD, Champaign, IL

Built 1900 ADT: 2,800

IC RR

Unknown

Over: WINDSOR RD(FAU 7145)

S EDGE CHAMPAIGN, Champaign, IL

Built 1990 ADT: 13,700

NORFOLK SOUTHERN R

Unknown

Over: IL 29

.5M W IL 48 INTCHG, Christian, IL

Built 1939 ADT: 10,600

IL 29

Unknown

Over: IL 48

.1M E IL 48 RAMP, Christian, IL

Built 1964 ADT: 3,000

N&W RR

Unknown

Over: ILL 48

AT TAYLORVILLE, Christian, IL

Built 1961 ADT: 2,950

CSX RR

Unknown

Over: I-70

NE OF MARSHALL, Clark, IL

Built 1968 ADT: 24,900

CNRL RR

Unknown

Over: US 40(FAS 1707)

1 MI E MARTINSVILLE, Clark, IL

Built 1954 ADT: 2,050

US 40(FAS 1707)

Unknown

Over: I-70

2 MI W STATE LINE, Clark, IL

Built 1968 ADT: 28,000

CH 6(FAS 686)

Unknown

Over: I-70

3 MI E MARTINSVILLE, Clark, IL

Built 1969 ADT: 23,400

CH 8(FAS 688)

Unknown

Over: I-70

1.75 MI W IL 1, Clark, IL

Built 1968 ADT: 23,400

CH 9(FAS 689)

Unknown

Over: I-70

MARTINSVILLE INT, Clark, IL

Built 1968 ADT: 23,400

CH 20(FAS 1660)

Unknown

Over: I-70

3.5 MI W STATE LINE, Clark, IL

Built 1968 ADT: 24,900

TR 189

Unknown

Over: I-70

.5 MI W IL 49 INT, Clark, IL

Built 1969 ADT: 23,500

CH 23

Unknown

Over: I-70

2.5 MI W MARTINSVILL, Clark, IL

Built 1969 ADT: 22,800

TR 107

Unknown

Over: I-70

.75 MI W IL 1, Clark, IL

Built 1969 ADT: 23,400

TR 183 B

Unknown

Over: I-70

1.25 MI E MARTINSVIL, Clark, IL

Built 1969 ADT: 23,400

TR 198

Unknown

Over: I-70

4.5 MI W IL 1, Clark, IL

Built 1969 ADT: 23,400

TR 223

Unknown

Over: I-70

1.2 MI E OF IL 49, Clark, IL

Built 1969 ADT: 22,800

TR 272 A

Unknown

Over: I-70

2 MI E IL 1, Clark, IL

Built 1968 ADT: 24,900

TR 340

Unknown

Over: I-70

3 MI W STATE LINE, Clark, IL

Built 1968 ADT: 24,900

TR 362

Unknown

Over: I-70 & OLD US 40

W STATE LINE, Clark, IL

Built 1968 ADT: 2,100

ILL 49(FAP 832)

Unknown

Over: I-70

CASEY, Clark, IL

Built 1969 ADT: 22,800

TR 48

Unknown

Over: I-70

2 MI E IL 49, Clark, IL

Built 1970 ADT: 22,800

I-70 (EB)

Unknown

Over: IL 1(FAP 332)

N MARSHALL, Clark, IL

Built 1969 ADT: 7,100

I-70 (WB)

Unknown

Over: IL 1(FAP 332)

N MARSHALL, Clark, IL

Built 1969 ADT: 7,100

ABANDONED RR

Unknown

Over: TR 165

0.25 MI E MARSHALL, Clark, IL

Built 1906 ADT: 250

TR-1

Unknown

Over: FAI-57

EFF-CLAY CO LINE, Clay, IL

Built 1968 ADT: 18,900

ICG RR

Unknown

Over: CH 7

2 MI W IOLA, Clay, IL

Built 1900 ADT: 450

ICG RR

Unknown

Over: CH-22

3 MI SW IOLA, Clay, IL

Built 1900 ADT: 200

ICG RR

Unknown

Over: TR-51

2 MI NW IOLA, Clay, IL

Built 1900 ADT: 50

ICG RR

Unknown

Over: TR-67

2 MI WNW IOLA, Clay, IL

Built 1900 ADT: 50

ICG RR

Unknown

Over: TR-217

2 MI W OSKALOOSA, Clay, IL

Built 1900 ADT: 25

ICG RR

Unknown

Over: TR-255

2 MI SW OSKALOOSA, Clay, IL

Built 1900 ADT: 25

ILL 160

Unknown

Over: FAI 64

3 MI W DAMIANSVILLE, Clinton, IL

Built 1970 ADT: 31,000

Albers Rd-CH8-FAS7

Unknown

Over: FAI 64

3 MI S ALBERS, Clinton, IL

Built 1971 ADT: 31,000

County Line Rd-CH

Unknown

Over: FAI 64

ST CLAIR CO LINE, Clinton, IL

Built 1972 ADT: 31,000

Billhartz Rd-FAS 7

Unknown

Over: FAI 64

1 MI W DAMIANSVILLE, Clinton, IL

Built 1970 ADT: 31,000

SCHUMACHER RD - TR

Unknown

Over: NEW US 50

5 MI E OF TRENTON, Clinton, IL

Built 1973 ADT: 6,850

Showing 201-250 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.