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

IL 31 NB EXIT RAM

Good

Over: CRYSTAL CREEK

0.1 M S Algonquin Rd, McHenry, IL

Built 2013 Load: 46.3 t ADT: 1,200

OLD & OLD OLD US 6

Good

Over: BURLINGTN NORTHRN RR

1M N IL 16, Montgomery, IL

Built 1998 Load: 46.3 t ADT: 2,550

RIVER RD

Good

Over: UNNAMED CREEK

3.5 MI SW BYRON, Ogle, IL

Built 1956 Load: 46.3 t ADT: 2,100

RICHWOODS BLVD

Good

Over: BIG HOLLOW CREEK

W1/2-25-KICKAPOO, Peoria, IL

Built 2019 Load: 46.3 t ADT: 100

US 150 (FAS 1517)

Good

Over: Norfolk Southern Railway

MANSFIELD, Piatt, IL

Built 2010 Load: 46.3 t ADT: 1,400

TR 105

Good

Over: STREAM

CO. FARM RD., Piatt, IL

Built 1991 Load: 46.3 t ADT: 125

ILL 96

Good

Over: BOYD DITCH

2.0 MI SE KINDERHOOK, Pike, IL

Built 2000 Load: 46.3 t ADT: 1,350

IL 150

Good

Over: LITTLE MARY'S RIVER

1.8MI N. OF CHESTER, Randolph, IL

Built 1999 Load: 46.3 t ADT: 5,450

I-55 (NB)

Good

Over: FANCY CREEK

1M N SHERMAN INTCHG, Sangamon, IL

Built 1962 Load: 46.3 t ADT: 14,600

FAS 1581 (CH13)

Good

Over: Horney Branch Creek

3.0 MI West of US 24, Schuyler, IL

Built 2018 Load: 46.3 t ADT: 125

TR-425

Good

Over: Green Creek

2.5 Mi. NW Sigel, Shelby, IL

Built 2018 Load: 46.3 t ADT: 150

TR 271A

Good

Over: Drake Creek

4.5 Mi. E Strasburg, Shelby, IL

Built 2019 Load: 46.3 t ADT: 75

IL 161

Good

Over: Metrolink

0.1mi W of IL 159, St. Clair, IL

Built 1935 Load: 46.3 t ADT: 14,700

IL 127

Good

Over: Locust Creek

5.5 mi S of Nashville, Washington, IL

Built 1980 Load: 46.3 t ADT: 4,350

FAP-332 (ILL-1/14)

Good

Over: MCHENRY SLOUGH

2 MI N CARMI, White, IL

Built 2014 Load: 46.3 t ADT: 4,100

MOLINE ROAD

Good

Over: DRAINAGE DITCH

0.06 MI E WILMOT RD, Whiteside, IL

Built 2002 Load: 46.3 t ADT: 1,000

US 6

Good

Over: MARLEY CREEK

1.1 M W OF COOK CO, Will, IL

Built 2020 Load: 46.3 t ADT: 14,200

PERRYVILLE ROAD

Good

Over: N KISHWAUKEE RVR

0.4 MI N BLACKHAWK, Winnebago, IL

Built 1971 Load: 46.3 t ADT: 3,200

I 90 WB

Good

Over: MOSQUITO CRK

3 MI SE OF BELVIDERE, Boone, IL

Built 2013 Load: 46.7 t ADT: 27,150

I-80 WB

Good

Over: Hennepin Canal

0.9 Mi. W. of IL 40, Bureau, IL

Built 2015 Load: 46.7 t ADT: 8,950

ILL 96

Good

Over: WEST PANTHER CREEK

2.7MI N OF MOZIER, Calhoun, IL

Built 1999 Load: 46.7 t ADT: 550

CHGO RD-S PARK AVE

Good

Over: LITTLE CAL RIVER

0.5 M N US 6, Cook, IL

Built 1927 Load: 46.7 t ADT: 7,800

I-90 (EB)

Good

Over: WCL RR

0.8 Mi. W. of Il 59, Cook, IL

Built 2016 Load: 46.7 t ADT: 133,400

I-90 (WB)

Good

Over: WCL RR

0.8 Mi. W. of Il 59, Cook, IL

Built 2016 Load: 46.7 t ADT: 133,400

IL 10 (FAP 717)

Good

Over: CREEK

W HALLSVILLE, De Witt, IL

Built 2010 Load: 46.7 t ADT: 1,300

31ST STREET

Good

Over: SALT CREEK

0.6MI E OF IL-83, DuPage, IL

Built 2002 Load: 46.7 t ADT: 11,800

TR 283

Good

Over: LIMESTONE CREEK

1.5 MI NW EDGEWOOD, Effingham, IL

Built 2012 Load: 46.7 t ADT: 50

TR 34A

Good

Over: Fulfer Creek

3.5 Mi. W. Edgewood, Effingham, IL

Built 2019 Load: 46.7 t ADT: 25

TR 312

Good

Over: Flat Creek

5 Mi. ESE Shobonier, Fayette, IL

Built 2021 Load: 46.7 t ADT: 100

KEARNEY RD

Good

Over: CARLTON CREEK

0.5 MI E OF MACEDONIA RD, Franklin, IL

Built 2023 Load: 46.7 t ADT: 50

IL 14

Good

Over: STREAM

0.2 MI E OF IL 142, Hamilton, IL

Built 2018 Load: 46.7 t ADT: 4,300

US 136 WB

Good

Over: LAMOINE RIVER

7.9MI W JCT61, Hancock, IL

Built 2007 Load: 46.7 t ADT: 3,700

IL 1

Good

Over: Gay Creek

3.2 M N of IL 9, Iroquois, IL

Built 2019 Load: 46.7 t ADT: 2,200

TR 121

Good

Over: Garfield Creek

1mi S, .5mi W of Iroquois, Iroquois, IL

Built 2023 Load: 46.7 t ADT: 75

FAS 1870-CH 7

Good

Over: BRANCH CREEK

2 MI W IL 4-SEC 7, Jackson, IL

Built 1995 Load: 46.7 t ADT: 1,100

IL 37

Good

Over: STREAM

N PART OF INA, Jefferson, IL

Built 2020 Load: 46.7 t ADT: 3,700

IL 72

Good

Over: HAMPSHIRE CREEK TRIB

4 M W OF IL 47, Kane, IL

Built 2022 Load: 46.7 t ADT: 10,600

BURR ROAD

Good

Over: FERSON CREEK

0.6M S of Silver Gle, Kane, IL

Built 2012 Load: 46.7 t ADT: 4,750

ILL 17

Good

Over: BULL CREEK

5.0 M SE OF JCT 1&17, Kankakee, IL

Built 2002 Load: 46.7 t ADT: 4,900

IL 83 (ANTIOCK RD

Good

Over: RR - CN

0.9 M N OF IL 132, Lake, IL

Built 2005 Load: 46.7 t ADT: 11,900

ILL 351 FAP 619

Good

Over: I & M CANAL Buzzi RR

0.20 MI S OF US 6, LaSalle, IL

Built 1953 Load: 46.7 t ADT: 5,250

WAYNESVILLE RD

Good

Over: LOCAL DRAINAGE

3.5 MI SE ATLANTA, Logan, IL

Built 1997 Load: 46.7 t ADT: 325

TR 5 (SCHOOL RD)

Good

Over: STREAM

6.5 MI NW WARRENSBUR, Macon, IL

Built 2022 Load: 46.7 t ADT: 100

FAU8902 GOVS PKWY

Good

Over: TRIB TO DUNLAP CRK

EDWARDSVILLE, Madison, IL

Built 2008 Load: 46.7 t ADT: 8,950

Lebanon Rd (CH 32)

Good

Over: Mill Creek

7 Mi E Collinsville, Madison, IL

Built 2020 Load: 46.7 t ADT: 350

TR 293

Good

Over: South Creek

1.5 Mi. S. Salem, Marion, IL

Built 2022 Load: 46.7 t ADT: 35

IL 173

Good

Over: PISCASAW CR OVERFLOW

1.88 M E OF CO. LINE, McHenry, IL

Built 2007 Load: 46.7 t ADT: 4,550

ILL 128(FAP 770)

Good

Over: CREEK

3.1 MI S DALTON CITY, Moultrie, IL

Built 1981 Load: 46.7 t ADT: 1,950

FAS 1254-CH 16

Good

Over: ILL RIVER TRIB

1360N, 1415E, Putnam, IL

Built 2020 Load: 46.7 t ADT: 3,000

TR 437

Good

Over: BECKS CREEK

2.5 MI NW HERRICK, Shelby, IL

Built 2008 Load: 46.7 t ADT: 175

Showing 24,401-24,450 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.