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

COUNTY RD-TR 134

Unknown

Over: I-74

2.9 MI E OF ILL 117, Woodford, IL

Built 1964 ADT: 28,400

CH 2 (2200 N)

Unknown

Over: I-39, US 51

.49 MI W OF IL 251, Woodford, IL

Built 1989 ADT: 16,000

TR 41 (2100 N)

Unknown

Over: I-39, US 51

3 MI N OF ILL 116, Woodford, IL

Built 1990 ADT: 15,900

FAP673 ILL 116

Unknown

Over: I-39, US 51

8 MI N OF US 24, Woodford, IL

Built 1990 ADT: 15,900

TR 95 (1600 N)

Unknown

Over: I-39, US 51

2 MI S OF ILL 116, Woodford, IL

Built 1990 ADT: 16,200

TR 103 (1500 N)

Unknown

Over: I-39, US 51

3.0 MI S OF ILL 116, Woodford, IL

Built 1989 ADT: 16,200

FAS 359 ROANOKE RD

Unknown

Over: I-39/US 51

3.5 MI N OF US24, Woodford, IL

Built 1990 ADT: 16,200

TR 165

Unknown

Over: I-39, US 51

1 MI N OF US 24, Woodford, IL

Built 1990 ADT: 16,200

I-39, US 51 SB

Unknown

Over: US 24 & TP&W RR

.5 MI W OF IL 251, Woodford, IL

Built 1989 ADT: 5,450

I-39, US 51 NB

Unknown

Over: US 24 & TP&W RR

.5 MI W OF IL 251, Woodford, IL

Built 1989 ADT: 8,250

TR 207

Unknown

Over: I-39, US 51

2 MI S OF US 24, Woodford, IL

Built 1990 ADT: 18,700

CH 9 KAPPA RD

Unknown

Over: 1-39, US 51

4.1 MI S OF US 24, Woodford, IL

Built 1989 ADT: 18,700

TR 229

Unknown

Over: I-39, US 51

5.2 MI S OF US 24, Woodford, IL

Built 1990 ADT: 18,700

DIVISION ST

Fair

Over: N BR CHICAGO RIV CAN

829 W DIVISION, Cook, IL

Built 1903 ADT: 13,400

NB I-294

Fair

Over: CC&P RR

0.15M N ILL 56, Cook, IL

Built 2022 ADT: 21,700

DORCHESTER AVE

Fair

Over: WINFIELD CRK

0.2 MI N IL-38, DuPage, IL

Built 1983 ADT: 1,000

CHILDS STREET

Fair

Over: WINFIELD CREEK

KNOLLWOOD AND CHILDS, DuPage, IL

Built 1955 ADT: 1,300

MILE LOAD RD-TR 42

Fair

Over: BN RR (063478L)

NE-1-T4NR2E, Fulton, IL

Built 1900 ADT: 50

TR 39

Fair

Over: BRANCH OF TILTON CR.

1.0 MI W DURHAM, Hancock, IL

Built 1914 ADT: 25

FAS-795

Fair

Over: SKILLET FORK CREEK

1 MI W HELM, Marion, IL

Built 1946 ADT: 1,000

FAS-795

Fair

Over: POPLAR CREEK

0.5 MI N HELM, Marion, IL

Built 1940 ADT: 1,000

TR-46

Fair

Over: FLAT CREEK

1 MI NW VERNON, Marion, IL

Built 1961 ADT: 50

OR 4 (CEMETERY RD.

Fair

Over: ASA CREEK

T3S R5W SEC 1, Moultrie, IL

Built 1960 ADT: 12

PARK ROAD

Fair

Over: DRY RUN CR

NW-5-T8NR8E, Peoria, IL

Built 1930 ADT: 550

PYATT-CUTLER RD/CH

Fair

Over: PIPESTONE CREEK

1.2 MI E OF CH 5, Perry, IL

Built 2023 ADT: 450

E. MCCONNELL RD.

Fair

Over: CEDAR CREEK

2.5 MI N DAKOTA, Stephenson, IL

Built 1958 ADT: 700

FULFS RD. (CH 18)

Fair

Over: TRIB. ELKHORN CREEK

3 MI. N. OF STERLING, Whiteside, IL

Built 1965 ADT: 800

TR-379

Fair

Over: VILLAGE CREEK

4 MI NE GOLDEN GATE, Wayne, IL

Built 1988 Load: 0.3 t ADT: 25

TR 186

Fair

Over: BRANCH OF TILTON CR.

1.0 MI W DURHAM, Hancock, IL

Built 1919 Load: 1.9 t ADT: 50

TR 210

Fair

Over: MILL CREEK

2.0 MI N PAYSON, Adams, IL

Built 1923 Load: 2.9 t ADT: 100

TR 111 A

Fair

Over: PAPER MILL BRANCH

4 MI N TAYLORVILLE, Christian, IL

Built 1956 Load: 3.2 t ADT: 125

TR 52A

Fair

Over: MCCRANEY CREEK TRIB.

1.5 MI N KINDERHOOK, Pike, IL

Built 1930 Load: 3.2 t ADT: 50

TR 113

Fair

Over: WILLEYS BRANCH

3.5 N TAYLORVILLE, Christian, IL

Built 1963 Load: 3.9 t ADT: 35

TR 321

Fair

Over: UNION DR DIS #3 MAIN

2 MI N HARVEL, Christian, IL

Built 1962 Load: 3.9 t ADT: 50

TR-427

Fair

Over: RACCOON CREEK

2.5 MI SW VANDALIA, Fayette, IL

Built 1925 Load: 4.2 t ADT: 75

TR-1

Fair

Over: CREEK

3.5 MI NW LANCASTER, Wabash, IL

Built 1971 Load: 4.5 t ADT: 35

TR 225

Fair

Over: CLEAR CREEK

5MI NW MORRISONVILLE, Christian, IL

Built 1963 Load: 4.9 t ADT: 10

TR-506

Fair

Over: HOG CREEK

2.5 MI N WRIGHTS CN, Fayette, IL

Built 1950 Load: 4.9 t ADT: 75

OLD DAD JOE TRAIL

Fair

Over: BUREAU CREEK

0.5 MI W JCT ILL 26, Bureau, IL

Built 1863 Load: 5.2 t ADT: 275

TR 950

Fair

Over: SANGAMON RIVER

1.2 MI NE MAHOMET, Champaign, IL

Built 1965 Load: 5.2 t ADT: 400

TR 399

Fair

Over: THE BLUFF CANAL

6.5 S WARSAW, Hancock, IL

Built 1906 Load: 5.8 t ADT: 75

TR 62

Fair

Over: BAPIST CREEK

NW-4-T6NR4W, McDonough, IL

Built 1921 Load: 5.8 t ADT: 400

TR 191

Fair

Over: CEDAR CREEK

CTR-6-T5NR4W, McDonough, IL

Built 1900 Load: 5.8 t ADT: 10

TR 328

Fair

Over: DONICA CREEK

6.5 MI SE OAKLAND, Coles, IL

Built 1940 Load: 6.2 t ADT: 25

COFFIN ROAD

Fair

Over: BUFFALO CREEK

.5 M N 53 1.0 M W 83, Lake, IL

Built 1925 Load: 6.2 t ADT: 2,500

TR 217 A

Fair

Over: LONG BRANCH

4 MI W ASSUMPTION, Christian, IL

Built 1958 Load: 6.5 t ADT: 100

TR 218

Fair

Over: BRONSON CREEK

3.5 SE BENTLEY, Hancock, IL

Built 1906 Load: 6.5 t ADT: 25

TR 320

Fair

Over: STREAM

3.0 MI SW STRASBURG, Shelby, IL

Built 1909 Load: 6.5 t ADT: 50

TR 81

Fair

Over: BEAN CREEK

3 MI NE POTOMAC, Vermilion, IL

Built 1944 Load: 6.5 t ADT: 50

TR 152

Fair

Over: CEDAR CR

NW-24-T11NR2W, Warren, IL

Built 1900 Load: 6.5 t ADT: 25

Showing 4,001-4,050 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.