State profile · Near median Poor share

Illinois bridge safety

Condition ratings, load ratings, and Poor-condition data for every public highway bridge in Illinois, based on the FHWA National Bridge Inventory.

27,743
Public bridges
41.2%
Good condition
7.9%
Poor condition

Data updated May 2026

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 whose lowest applicable component is rated 0-4

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 - Poor-condition share 26.3%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.

Condition Distribution

Illinois48.2%42.6%9.2%GoodFairPoor
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 by Poor-condition share (lower share = better)

States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below Illinois on the same metric.

RI

Rhode Island

7.69% top marginal rate
Structure
Progressive
Burden @ $100K
$78

NE

Nebraska

7.73% top marginal rate
Structure
Progressive
Burden @ $100K
$15,571
Selected

IL

Illinois

7.88% top marginal rate
Structure
Progressive
Burden @ $100K
$27,743

MA

Massachusetts

7.96% top marginal rate
Structure
Progressive
Burden @ $100K
$5,314

MO

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 the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

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

Poor

Over: WILSON CREEK

NE-35-T3NR2E, Fulton, IL

Built 1935 Load: 1.3 t ADT: 10

TR 10-B

Poor

Over: KING CREEK

W EDGE OF MINERAL, Bureau, IL

Built 1899 Load: 1.6 t ADT: 10

TR-6

Poor

Over: DRAINAGE DITCH

3.5 MI NE DIETERICH, Effingham, IL

Built 1909 Load: 1.6 t ADT: 25

TR208K(TWIN BRIDGE

Poor

Over: BIG CREEK

NE EDGE MT ZION, Macon, IL

Built 1967 Load: 1.9 t ADT: 375

All Bridges in Illinois

TR 154

Good

Over: STREAM

W.CTR.-23-T11NR2E, Knox, IL

Built 1983 Load: 32.4 t ADT: 250

TR 56A

Good

Over: HENDERSON CREEK

SW-34-T13NR1E, Knox, IL

Built 1985 Load: 32.4 t ADT: 25

TR 15

Good

Over: MUD RUN CREEK

NE-12-T13NR3E, Knox, IL

Built 1984 Load: 32.4 t ADT: 25

CO HWY 2

Good

Over: POPE CREEK TRIB.

NE-20-T13NR2E, Knox, IL

Built 1985 Load: 32.4 t ADT: 150

TR 114

Good

Over: TRIB TO POPE CREEK

NW-9-T13NR2E, Knox, IL

Built 1986 Load: 32.4 t ADT: 25

TR 320

Good

Over: WALNUT CREEK

E1/2-2-T12NR4E, Knox, IL

Built 1986 Load: 32.4 t ADT: 25

TR 76

Good

Over: POPE CREEK

SW-1-T13NR1E RIO TWP, Knox, IL

Built 1986 Load: 32.4 t ADT: 50

TR 250

Good

Over: HICKORY CREEK

SW-11-T9NR3E, Knox, IL

Built 1986 Load: 32.4 t ADT: 25

TR 359

Good

Over: TRIB TO SPOON RIVER

NE-33-T9NR2E, Knox, IL

Built 1987 Load: 32.4 t ADT: 10

CH 19

Good

Over: FRENCH CREEK

W.CTR-32-T10NR4E, Knox, IL

Built 1988 Load: 32.4 t ADT: 100

TR 318

Good

Over: FRENCH CREEK

SE-35-T11NR4E, Knox, IL

Built 1993 Load: 32.4 t ADT: 125

TR 305

Good

Over: TRIB TO FRENCH CREEK

NW-5-T9NR4E, Knox, IL

Built 1988 Load: 32.4 t ADT: 100

TR 175

Good

Over: MIDDLE CREEK

E1/2-11-T11NR2E, Knox, IL

Built 1995 Load: 32.4 t ADT: 225

TR 8

Good

Over: INDIAN CREEK

CTR-18-T9NR1E, Knox, IL

Built 1990 Load: 32.4 t ADT: 25

TR 56A

Good

Over: TRIB. S HENDERSON CR

NE-15-T12NR1E, Knox, IL

Built 1989 Load: 32.4 t ADT: 75

TR 152

Good

Over: HAW CREEK

W1/2-14-T10NR2E, Knox, IL

Built 1990 Load: 32.4 t ADT: 50

FAS 394 - CH 12

Good

Over: FOREMAN CREEK

SE-4-T12NR3E, Knox, IL

Built 1993 Load: 32.4 t ADT: 250

TR 240

Good

Over: COURT CREEK

NE-22-T11NR3E, Knox, IL

Built 1989 Load: 32.4 t ADT: 10

TR 94

Good

Over: STREAM

SW-29-T9NR2E, Knox, IL

Built 1990 Load: 32.4 t ADT: 10

TR 192A

Good

Over: FOREMAN CREEK

S1/2-6-T12NR3E, Knox, IL

Built 1994 Load: 32.4 t ADT: 250

FAS 394 - CH 12

Good

Over: TRIB. COURT CREEK

SE-16-T11NR3E, Knox, IL

Built 1993 Load: 32.4 t ADT: 900

CH 19

Good

Over: TRIB. FRENCH CREEK

SW-32-T10NR4E, Knox, IL

Built 1992 Load: 32.4 t ADT: 100

FAS 1395-CH 6

Good

Over: POPE CREEK

SW-5-T13NR2E, Knox, IL

Built 1992 Load: 32.4 t ADT: 125

TR 324

Good

Over: SWAB RUN CREEK

SW-36-T10NR4E, Knox, IL

Built 1992 Load: 32.4 t ADT: 125

TR 83

Good

Over: HENDERSON CREEK

NE-7-T12NR1E, Knox, IL

Built 1994 Load: 32.4 t ADT: 75

CH 16

Good

Over: TRIB TO WALNUT CREEK

E.CTR-29-T13NR4E, Knox, IL

Built 1994 Load: 32.4 t ADT: 100

TR 267

Good

Over: FRENCH CREEK

SE-22-T10NR4E, Knox, IL

Built 1993 Load: 32.4 t ADT: 50

FAS 401 - CH 25

Good

Over: TRIB TO BRUSH CREEK

E.CTR-3-T10NR1E, Knox, IL

Built 1994 Load: 32.4 t ADT: 950

CH 39

Good

Over: TRIB TO SPOON RIVER

NE-21-T9NR2E, Knox, IL

Built 2006 Load: 32.4 t ADT: 125

COUNTY HIGHWAY 05

Good

Over: BRUSH CREEK

NE-36-T10NR1E, Knox, IL

Built 1997 Load: 32.4 t ADT: 425

TR 166

Good

Over: COURT CREEK

SW-24-T11NR2E, Knox, IL

Built 1995 Load: 32.4 t ADT: 75

TR 192

Good

Over: STREAM

S1/2-19-T13NR3E, Knox, IL

Built 1995 Load: 32.4 t ADT: 75

COUNTY HIGHWAY 12

Good

Over: TRIB TO SUGAR CREEK

S.CTR-9-T11NR3E, Knox, IL

Built 1998 Load: 32.4 t ADT: 850

COUNTY HIGHWAY 19

Good

Over: TRIB TO FRENCH CREEK

SW-32-T10NR4E, Knox, IL

Built 1997 Load: 32.4 t ADT: 100

CH 19

Good

Over: TRIB TO FRENCH CREEK

NW-5-T9NR4E, Knox, IL

Built 1997 Load: 32.4 t ADT: 100

TR 6CO LINE RD

Good

Over: SOUTHHENDERSON CREEK

NW-19-T12NR1E, Knox, IL

Built 1995 Load: 32.4 t ADT: 75

TR 338

Good

Over: FRENCH CREEK

SE-1-T10NR4E, Knox, IL

Built 1996 Load: 32.4 t ADT: 25

TR 44

Good

Over: INDIAN CREEK

SE-9-T9NR1E, Knox, IL

Built 1997 Load: 32.4 t ADT: 25

TR 136

Good

Over: MIDDLE CREEK

R2E-4THPM-SEC 3, Knox, IL

Built 1996 Load: 32.4 t ADT: 75

TR 134

Good

Over: STREAM

SW-3-T13NR2E, Knox, IL

Built 1998 Load: 32.4 t ADT: 25

FAS 237 (CH 3)

Good

Over: TRIB. TO WALNUT CRK

SW1/4 SEC 24 T13NR2E, Knox, IL

Built 1997 Load: 32.4 t ADT: 375

TR 236

Good

Over: FLEA CREEK

SW-23-T9NR3E, Knox, IL

Built 1998 Load: 32.4 t ADT: 50

OAK RUN ROAD

Good

Over: TRIB TO SPOON LAKE

NE-4-T11NR3E, Knox, IL

Built 1998 Load: 32.4 t ADT: 425

TR 206

Good

Over: NORTH CREEK

SW-17-T11NR3E, Knox, IL

Built 1999 Load: 32.4 t ADT: 75

TR 289

Good

Over: TRIB TO FRENCH CREEK

S.CTR-29-T10NR4E, Knox, IL

Built 2000 Load: 32.4 t ADT: 25

TR 324B

Good

Over: KICKAPOO CREEK

SW-13-T9NR4E, Knox, IL

Built 1999 Load: 32.4 t ADT: 650

TR 236

Good

Over: LITTLERS CREEK

NW-35-T9NR3E, Knox, IL

Built 2001 Load: 32.4 t ADT: 50

TR 15

Good

Over: WALNUT CREEK

CTR-9-T13NR3E, Knox, IL

Built 1999 Load: 32.4 t ADT: 75

TR 301

Good

Over: BRUSH CREEK

NE-6-T9NR2E, Knox, IL

Built 2000 Load: 32.4 t ADT: 25

TR 84

Good

Over: TRIB HENDERSON CR

SW-30-T13NR2E, Knox, IL

Built 2000 Load: 32.4 t ADT: 50

Showing 18,451-18,500 of 27,743 bridges

Related

All states → | National rankings → | Understanding conditions → | Retired SD term explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.

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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.

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.

Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.