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

74EB TO EB CAMP ST

Unknown

Over: MAIN ST & RAMP 1.71

0.03 MI W OF US 116, Tazewell, IL

Built 2005 ADT: 25,000

CAMP ST TO WB 74

Unknown

Over: MAINST&WB74TONBSB116

0.02 MI NE 74, Tazewell, IL

Built 2006 ADT: 24,500

EXIT TO CAMP ST

Unknown

Over: WB US 150

.25 MI E JCT US 116, Tazewell, IL

Built 2005 ADT: 12,500

EB I-74

Unknown

Over: ALTORFER ST

.25 MI W OF ILL 116, Tazewell, IL

Built 2005 ADT: 100

WB I-74

Unknown

Over: ALTORFER ST

.25 MI W OF ILL 116, Tazewell, IL

Built 2006 ADT: 100

WB I-74

Unknown

Over: ILL 116 (MAIN ST)

ILL 116 INTERCHANGE, Tazewell, IL

Built 2006 ADT: 25,000

EB I-74

Unknown

Over: ILL 116(MAIN ST)

ILL 116 INTERCHANGE, Tazewell, IL

Built 2005 ADT: 25,000

EB I-74,RP L-1

Unknown

Over: E WASHINGTON, TAYLOR

ILL 8 INTER,E PEORIA, Tazewell, IL

Built 2005 ADT: 1,100

WB I-74,RP L-4

Unknown

Over: E WASHINGTON, TAYLOR

ILL 8 INTER,E PEORIA, Tazewell, IL

Built 2006 ADT: 1,100

I-155 SB

Unknown

Over: I-74

I-155/74INTERCHANGE, Tazewell, IL

Built 2015 ADT: 52,900

I-155NB

Unknown

Over: I-74

I-155/74INTERCHANGE, Tazewell, IL

Built 2016 ADT: 52,900

I-74WB&EB

Unknown

Over: CH 22 JEFFERSON ST

0.2 Mi W. of US 150, Tazewell, IL

Built 2015 ADT: 5,200

I-74

Unknown

Over: US150 & Bike Path

.5 MI W MORTON INTER, Tazewell, IL

Built 2015 ADT: 5,600

PINECREST DR.

Unknown

Over: I-74

PINECREST DR., Tazewell, IL

Built 2021 ADT: 38,200

AT&SF RR (801921W)

Unknown

Over: US 24

NE-23-T26NR3W, Tazewell, IL

Built 1900 ADT: 10,300

CNW(175541L)

Unknown

Over: ILL 29

E.CTR-16-T24NR5W, Tazewell, IL

Built 1900 ADT: 5,700

CNW(175542T)

Unknown

Over: FAS 461

SE COR-9-T24NR5W, Tazewell, IL

Built 1913 ADT: 4,550

CNW(175530Y)

Unknown

Over: TR 221A

N.CTR-27-T23NR5W, Tazewell, IL

Built 1900 ADT: 175

NW RR (541831D)

Unknown

Over: TR 274

W.CTR-18-T24NR2W, Tazewell, IL

Built 1900 ADT: 50

FAI 57 SB & US 51

Unknown

Over: FAS 926-BIG CREEK

0.2 MI E DONGOLA, Union, IL

Built 1959 ADT: 900

I 57 NB & US 51 NB

Unknown

Over: FAS 926-BIG CREEK

0.2 MI E DONGOLA, Union, IL

Built 1959 ADT: 900

I 57 NB

Unknown

Over: CH 17 CHRISTIAN CHAP

0.6 MI S ILL 146, Union, IL

Built 1959 ADT: 400

I 57 SB

Unknown

Over: CH 17 CHRISTIAN CHAP

0.6 MI S ILL 146, Union, IL

Built 1959 ADT: 400

FAI 57 NB

Unknown

Over: ILL 146

OVER ILL 146, Union, IL

Built 1958 ADT: 4,100

FAI 57 SB

Unknown

Over: ILL 146

OVER ILL 146, Union, IL

Built 1958 ADT: 4,100

I 57 NB

Unknown

Over: TR 276 N LICK CR RD

1.5 MI S JOHNSON CO, Union, IL

Built 1959 ADT: 150

I 57 SB

Unknown

Over: TR 276 N LICK CR RD

1.5 MI S JOHNSON CO, Union, IL

Built 1959 ADT: 150

CH 20 NEW HOPE RD

Unknown

Over: INTERSTATE 57

2 MI SW LICK CREEK, Union, IL

Built 1959 ADT: 14,300

TR 287 SWAN POND R

Unknown

Over: FAI 57 & US 51

0.1 MI S DONGOLA, Union, IL

Built 1957 ADT: 13,800

FAS 924-CH 4 EXIT

Unknown

Over: INTERSTATE 57

0.2 MI W LICK CREEK, Union, IL

Built 1959 ADT: 15,900

TR 141 CRAFT LN

Unknown

Over: INTERSTATE 57

3.4 MI N OF ILL 146, Union, IL

Built 1959 ADT: 14,300

TR 193 FRIENDSHIP

Unknown

Over: INTERSTATE 57

1.1 MI S ILL 146, Union, IL

Built 1959 ADT: 13,200

US 51 NB

Unknown

Over: FAI 57 SB

0.5 MI N DONGOLA, Union, IL

Built 1959 ADT: 13,200

I-57

Unknown

Over: SHAKE RAG ROAD

E OF DONGOLA, Union, IL

Built 2020 ADT: 75

I-57 SB

Unknown

Over: SHAKE RAG ROAD

E OF DONGOLA, Union, IL

Built 2019 ADT: 75

I-74 (EB)

Unknown

Over: MIDDLEFORK VERM RIV

4 MI W OF DANVILLE, Vermilion, IL

Built 1960 ADT: 75

I-74 (WB)

Unknown

Over: MIDDLEFORK VERM RIV

4 MI W OF DANVILLE, Vermilion, IL

Built 1960 ADT: 75

CSX RR (abandoned)

Unknown

Over: I-74

W OF HILLERY, Vermilion, IL

Built 1960 ADT: 25,000

I-74 (EB)

Unknown

Over: NSRR(abnd) &FAU7026(L ST

IN TILTON, Vermilion, IL

Built 1964 ADT: 1,710

I-74 (WB)

Unknown

Over: NSRR(abnd) &FAU7026(L ST

IN TILTON, Vermilion, IL

Built 1964 ADT: 1,710

I-74 (EB)

Unknown

Over: "G" ST(FAU 7026)

IN TILTON, Vermilion, IL

Built 1964 ADT: 1,050

I-74 (WB)

Unknown

Over: "G" ST(FAU 7026)

IN TILTON, Vermilion, IL

Built 1964 ADT: 1,050

I-74 (WB)

Unknown

Over: CSX CorpRR & FR1563 &161

IN TILTON, Vermilion, IL

Built 1964 ADT: 75

I-74 (EB)

Unknown

Over: CSX CorpRR & FR1563 &161

IN TILTON, Vermilion, IL

Built 1964 ADT: 75

I-74 (EB)

Unknown

Over: GRIFFIN ST(FAU 7046)

IN DANVILLE, Vermilion, IL

Built 1964 ADT: 525

I-74 (WB)

Unknown

Over: GRIFFIN ST(FAU 7046)

IN DANVILLE, Vermilion, IL

Built 1964 ADT: 525

CMStP&Pac RR (aban

Unknown

Over: I-74

2 MI SE OF DANVILLE, Vermilion, IL

Built 1961 ADT: 18,300

I-74(WB)&RAMP21.70

Unknown

Over: CSX RR & MS9010 (CR2100E

W OF LYNCH SPUR, Vermilion, IL

Built 1964 ADT: 275

I-74(EB)

Unknown

Over: CSX RR & MS9010 (CR2100E

W OF LYNCH SPUR, Vermilion, IL

Built 1964 ADT: 275

I-74 (WB)

Unknown

Over: LYNCH RD.

E OF DANVILLE, Vermilion, IL

Built 1961 ADT: 3,900

Showing 3,601-3,650 of 27,743 bridges

Related

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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.