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

TR 333

Unknown

Over: FAI 180

2.5 MI N JCT ILL 29, Bureau, IL

Built 1968 ADT: 4,150

TR 364 (3000E)

Unknown

Over: I-80

1.4 MI N SEATONVILLE, Bureau, IL

Built 1963 ADT: 22,900

CH 27 FAS 1230

Unknown

Over: I-80

0.5 MI W JCT I-180, Bureau, IL

Built 1962 ADT: 18,600

CH 19 FAS 1235

Unknown

Over: I-80

3.0 MI E JCT I-180, Bureau, IL

Built 1963 ADT: 22,900

TR 370 (3100E)

Unknown

Over: I-80

2.2 MI W IL 89, Bureau, IL

Built 1962 ADT: 22,900

IL 26 FAP 316

Unknown

Over: I-80

N. EDGE OF PRINCETON, Bureau, IL

Built 2003 ADT: 18,600

I-80 EB

Unknown

Over: BRUSH CREEK & TR 352

4.6 MI E JCT I-180, Bureau, IL

Built 2011 ADT: 100

I-80 WB

Unknown

Over: BRUSH CREEK & TR 352

4.6 MI E JCT I-180, Bureau, IL

Built 2010 ADT: 100

IL 89 FAP 698

Unknown

Over: FAI 80

S. EDGE OF LADD, Bureau, IL

Built 2008 ADT: 22,900

TR 82-C (645 E St)

Unknown

Over: I-80

2.5 Mi W of IL 40, Bureau, IL

Built 2023 ADT: 17,900

CNW RR

Unknown

Over: US 6 FAP 613

0.2 MI W. OF IL 40, Bureau, IL

Built 1900 ADT: 2,400

Illinois Railway R

Unknown

Over: US 6

SPRING VALLEY, Bureau, IL

Built 1958 ADT: 10,050

CNW RR

Unknown

Over: ILL 40 FAP 646

1 MI N US 6, Bureau, IL

Built 1934 ADT: 2,400

BN RR

Unknown

Over: TR 96A

SW OF BUDA, Bureau, IL

Built 1900 ADT: 50

BN RR

Unknown

Over: TR 170B

NE OF WYANET, Bureau, IL

Built 1899 ADT: 25

ABANDONED CNW RR

Unknown

Over: TR 251

1.3 MI E LADD, Bureau, IL

Built 1900 ADT: 750

CRI&P RR

Unknown

Over: TR 268

2.5 MI E TISKILWA, Bureau, IL

Built 1914 ADT: 100

NYC RR

Unknown

Over: TR 362

SEATONVILLE, Bureau, IL

Built 1900 ADT: 75

BN RR

Unknown

Over: TR 398

SPRING VALLEY, Bureau, IL

Built 1900 ADT: 725

IL 26 & OR 26

Unknown

Over: I-180/IL 71

JCT I 180 AND ILL 26, Bureau, IL

Built 1969 ADT: 2,900

CH 1

Unknown

Over: FAI-180

0.17 MI N OF ILL 26, Bureau, IL

Built 1969 ADT: 2,900

IL 84

Unknown

Over: SOO LINE RR/CITY ST

.1 MI S IL64 SAVANNA, Carroll, IL

Built 1988 ADT: 35

DM&E RR

Unknown

Over: ILL 78

.2 MI S US 52, Carroll, IL

Built 1949 ADT: 2,450

BNSF RR

Unknown

Over: ILL 40

MILLEDGEVILLE, Carroll, IL

Built 1934 ADT: 2,400

BNSF RR

Unknown

Over: CH 11

2 MI NE ARGO FAY, Carroll, IL

Built 1913 ADT: 200

BNSF RR

Unknown

Over: SCENIC BLUFF RD

2 MI SE SAVANNA, Carroll, IL

Built 1900 ADT: 50

DM&E RR

Unknown

Over: WACKER RD

1 MI SE SAVANNA, Carroll, IL

Built 1934 ADT: 150

DM&E RR

Unknown

Over: ASHBY RD

3 MI SE SAVANNA, Carroll, IL

Built 1934 ADT: 175

DM&E RR

Unknown

Over: PRESTON RD

2 MI SW MT CARROLL, Carroll, IL

Built 1945 ADT: 100

I-57(NB)

Unknown

Over: CN Railway & IL 10

W OF CHAMPAIGN, Champaign, IL

Built 1964 ADT: 8,200

I-57(SB)

Unknown

Over: CN Railway & IL 10

W OF CHAMPAIGN, Champaign, IL

Built 1964 ADT: 8,200

Norfolk Southern R

Unknown

Over: I-57

W OF CHAMPAIGN, Champaign, IL

Built 1965 ADT: 34,400

I-57(SB)

Unknown

Over: US 136(FAP 709)

RANTOUL, Champaign, IL

Built 1969 ADT: 5,900

I-57(NB)

Unknown

Over: US 136(FAP 709)

RANTOUL, Champaign, IL

Built 1969 ADT: 10,600

I-74(WB)

Unknown

Over: IL 47

IN MAHOMET, Champaign, IL

Built 1966 ADT: 7,850

I-74(EB)

Unknown

Over: IL 47

NE OF MAHOMET, Champaign, IL

Built 1966 ADT: 7,850

I-74(EB)

Unknown

Over: I-57

NW OF CHAMPAIGN, Champaign, IL

Built 1965 ADT: 34,400

I-74(WB)

Unknown

Over: I-57

NW OF CHAMPAIGN, Champaign, IL

Built 1965 ADT: 23,000

I-74

Unknown

Over: MARKET ST(FAU 7169)

CHAMPAIGN, Champaign, IL

Built 1957 ADT: 10,500

I-74

Unknown

Over: CN Railwy & TR 158/Oak S

CHAMPAIGN, Champaign, IL

Built 1956 ADT: 450

I-74

Unknown

Over: US 45(FAP 800)

N OF URBANA, Champaign, IL

Built 1956 ADT: 17,900

I-74 RAMP17.79&17.

Unknown

Over: I-74 & RMP 17.17

E OF URBANA, Champaign, IL

Built 1960 ADT: 28,300

I-72(EB)

Unknown

Over: I-57

W OF CHAMPAIGN, Champaign, IL

Built 1965 ADT: 25,800

I-72(WB)

Unknown

Over: I-57

W OF CHAMPAIGN, Champaign, IL

Built 1965 ADT: 34,400

US 150(FAS 1512)

Unknown

Over: UPRR & CSX(abnd) & TR199

1.25 MI E ST JOSEPH, Champaign, IL

Built 1935 ADT: 10

N&S RR

Unknown

Over: FAP 804 (US 45)

TOLONO, Champaign, IL

Built 1936 ADT: 4,700

FAP 326 (IL 47)

Unknown

Over: I-72

NE OF SEYMOUR, Champaign, IL

Built 1969 ADT: 17,300

FAS 516(ELM ST)

Unknown

Over: I-57

LUDLOW, Champaign, IL

Built 1969 ADT: 21,100

FAS 516(CH 12)

Unknown

Over: I-74

ST JOSEPH, Champaign, IL

Built 1959 ADT: 26,400

FAU 7138

Unknown

Over: I-57

W OF CHAMPAIGN, Champaign, IL

Built 1963 ADT: 25,800

Showing 101-150 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.