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-179

Fair

Over: CRABAPPLE CREEK

1 MI SW SUMNER, Lawrence, IL

Built 1909 Load: 24.3 t ADT: 150

CH 8 STEWARD RD

Fair

Over: BRANCH OF STEWARD CR

3.0 MI N STEWARD, Lee, IL

Built 1962 Load: 24.3 t ADT: 600

ST MARY'S ROAD

Fair

Over: STREAM

7.5 MI S OF AMBOY, Lee, IL

Built 1971 Load: 24.3 t ADT: 25

NACHUSA RD

Fair

Over: CHAMBERLAN CREEK

1.2 MI N OF ILL 38, Lee, IL

Built 1971 Load: 24.3 t ADT: 75

KILGORE ROAD

Fair

Over: KEMPER'S CREEK

3 MI W OF DIXON, Lee, IL

Built 1927 Load: 24.3 t ADT: 325

INLET ROAD

Fair

Over: BR OF GREEN RIVER

0.4 M N OF US RT 52, Lee, IL

Built 1961 Load: 24.3 t ADT: 550

CH 20 LAMOILLE RD

Fair

Over: DRAINAGE DITCH

1.7 MI N BUREAU CO L, Lee, IL

Built 1931 Load: 24.3 t ADT: 600

BROOKLYN RD

Fair

Over: DRAINAGE DITCH

4.2 M N OF US 30, Lee, IL

Built 1962 Load: 24.3 t ADT: 250

NAUMAN RD

Fair

Over: TRIB GREEN RIVER

0.3 E OF US 52, Lee, IL

Built 1969 Load: 24.3 t ADT: 25

HILLISON ROAD

Fair

Over: UNNAMED CREEK

0.1 M W FRANKLIN RD, Lee, IL

Built 1966 Load: 24.3 t ADT: 25

RED BRICK RD

Fair

Over: 5-MILE BRANCH

0.5 MI N OF US 30, Lee, IL

Built 1959 Load: 24.3 t ADT: 325

FAS 343 CH-3

Fair

Over: CREEK

2.6 MI N OF CHATSWTH, Livingston, IL

Built 1931 Load: 24.3 t ADT: 575

TR 2

Fair

Over: MOON CREEK

3005 N, 00 E, Livingston, IL

Built 1928 Load: 24.3 t ADT: 50

TR 2

Fair

Over: DIAMOND CREEK

2270 N, 00 E, Livingston, IL

Built 1931 Load: 24.3 t ADT: 10

TR 2

Fair

Over: DRAINAGE DITCH

1015 N, 00E, Livingston, IL

Built 1935 Load: 24.3 t ADT: 10

TR 4C

Fair

Over: DRAINAGE DITCH

1015 N, 100 E, Livingston, IL

Built 1935 Load: 24.3 t ADT: 25

TR 44

Fair

Over: SHORT POINT CREEK

2480N, 750E, Livingston, IL

Built 1921 Load: 24.3 t ADT: 25

TR 119

Fair

Over: TRIB SHORT POINT CR

355 E, 1900 N, Livingston, IL

Built 1924 Load: 24.3 t ADT: 275

TR 248A

Fair

Over: CREEK

670 N, 3000 E, Livingston, IL

Built 1929 Load: 24.3 t ADT: 50

TR 251

Fair

Over: CREEK

3265 E, 300 N, Livingston, IL

Built 1927 Load: 24.3 t ADT: 25

TR 141 1600 N

Fair

Over: TRIB N FORK VERMILLI

2225 E, 1600 N, Livingston, IL

Built 1900 Load: 24.3 t ADT: 75

FAS 343 CH 3

Fair

Over: WATERWAY

860N, 3300E, Livingston, IL

Built 1936 Load: 24.3 t ADT: 850

BEASON-CHESTNUT RD

Fair

Over: SALT CK TRIB

1.5 MI N CHESTNUT, Logan, IL

Built 1945 Load: 24.3 t ADT: 350

NEW HOLLAND-SAN JO

Fair

Over: LOCAL DRAINAGE

4 N OF NEW HOLLAND, Logan, IL

Built 1960 Load: 24.3 t ADT: 150

TR 121

Fair

Over: LOCAL DRAINAGE

2 MI NE MIDDLETOWN, Logan, IL

Built 1955 Load: 24.3 t ADT: 50

TR 253

Fair

Over: N FORK LAKE FORK CR

3 S 1 MI W NARITA, Logan, IL

Built 1963 Load: 24.3 t ADT: 50

TR 286

Fair

Over: S FORK LAKE FORK CK

3.5 MI S NARITA, Logan, IL

Built 1965 Load: 24.3 t ADT: 50

TR 3

Fair

Over: LOCAL DRAINAGE

1.5 MI N EMDEN, Logan, IL

Built 1900 Load: 24.3 t ADT: 50

MOUND RD(FAU 7359)

Fair

Over: STREAM

MOUND & GREENSWITCH, Macon, IL

Built 1966 Load: 24.3 t ADT: 2,775

TR 215(ELWIN RD)

Fair

Over: STREAM

1.8 MI S LINCOLN TR, Macon, IL

Built 1979 Load: 24.3 t ADT: 50

FAS 731

Fair

Over: NASSA CR.

3 MI. E. MODESTO, Macoupin, IL

Built 1927 Load: 24.3 t ADT: 300

CH 33

Fair

Over: JOES CRK

5 SW OF HETTICK, Macoupin, IL

Built 1900 Load: 24.3 t ADT: 20

FAS 623

Fair

Over: SUGAR CREEK

1.5 MI NW OF VIRDEN, Macoupin, IL

Built 1961 Load: 24.3 t ADT: 150

TR 64C Sage Rd

Fair

Over: GOOSE CREEK

2.0W 1.5N HETTICK, Macoupin, IL

Built 1900 Load: 24.3 t ADT: 25

TR 148

Fair

Over: CREEK

2 MI S 3.5 MI W BUNK, Macoupin, IL

Built 1900 Load: 24.3 t ADT: 150

TR 303

Fair

Over: CREEK

1.5 MI N MEDORA, Macoupin, IL

Built 1916 Load: 24.3 t ADT: 20

TR 453

Fair

Over: INDIAN CRK.

.5 MI S .5 MI W BUNK, Macoupin, IL

Built 1914 Load: 24.3 t ADT: 75

TR 455

Fair

Over: PADDOCK CREEK

.5 S BUNKER HILL, Macoupin, IL

Built 1916 Load: 24.3 t ADT: 125

TR 451

Fair

Over: CREEK

4.3 MI E BRIGHTON, Macoupin, IL

Built 1975 Load: 24.3 t ADT: 200

OLIVE RD/ TR 324

Fair

Over: TRIB TO SUGAR FK

0.3MI E ALHAMBRA, Madison, IL

Built 1918 Load: 24.3 t ADT: 50

ALBY RD/ FAU 8988

Fair

Over: COAL BR

N CORP LIMALTON, Madison, IL

Built 1979 Load: 24.3 t ADT: 7,800

KIN LOU RD-FAS 270

Fair

Over: LOST FORK

4 MI W CLAY CO LN, Marion, IL

Built 1909 Load: 24.3 t ADT: 575

CH-38

Fair

Over: PERKINS BRANCH

3 MI E VERNON, Marion, IL

Built 1909 Load: 24.3 t ADT: 75

CH-40

Fair

Over: HORSE CREEK

3.5 MI E KELL, Marion, IL

Built 1909 Load: 24.3 t ADT: 100

TR-6

Fair

Over: LOUSE CREEK

2 MI SW PATOKA, Marion, IL

Built 1971 Load: 24.3 t ADT: 175

TR-58A

Fair

Over: NORTH FORK

1 MI N PATOKA, Marion, IL

Built 1960 Load: 24.3 t ADT: 25

TR-120

Fair

Over: FLAT CREEK

1.5 MI NE VERNON, Marion, IL

Built 1909 Load: 24.3 t ADT: 50

TR-170

Fair

Over: NORTH FORK

3.5 MI ESE VERNON, Marion, IL

Built 1921 Load: 24.3 t ADT: 25

TR-176

Fair

Over: NORTH FORK

4 MI ESE VERNON, Marion, IL

Built 1909 Load: 24.3 t ADT: 25

TR-201

Fair

Over: DUMS CREEK

3.5 MI E SALEM, Marion, IL

Built 1909 Load: 24.3 t ADT: 75

Showing 5,401-5,450 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.