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

FAS 489/CH 21

Good

Over: MONEY CREEK

4.2 MI SW COOKSVILLE, McLean, IL

Built 2000 Load: 32.4 t ADT: 800

TR 580

Good

Over: TRIB SANGAMON RIVER

1.5 MI NNW SAYBROOK, McLean, IL

Built 1980 Load: 32.4 t ADT: 50

TR 2

Good

Over: SANGAMON RIVER

4.0 MI SE SAYBROOK, McLean, IL

Built 1979 Load: 32.4 t ADT: 75

TR 604

Good

Over: TRIB SANGAMON RIVER

2.2 MI NE SAYBROOK, McLean, IL

Built 1984 Load: 32.4 t ADT: 50

TR 596

Good

Over: SANGAMON RIVER

2.0 MI NE SAYBROOK, McLean, IL

Built 1990 Load: 32.4 t ADT: 50

TR 373

Good

Over: STREAM

3.5 MI E SAYBROOK, McLean, IL

Built 1993 Load: 32.4 t ADT: 175

TR 23

Good

Over: BR ROOKS CREEK

2.0 MI SW CHENOA, McLean, IL

Built 1997 Load: 32.4 t ADT: 75

FAS 356 CH 23

Good

Over: TURKEY CREEK

4.5 MI SW CHENOA, McLean, IL

Built 2012 Load: 32.4 t ADT: 575

CH34

Good

Over: SUGAR CREEK

3.0 MI W SHIRLEY, McLean, IL

Built 1986 Load: 32.4 t ADT: 200

TR 293

Good

Over: KINGS MILL CREEK

5.0 NNW SHIRLEY, McLean, IL

Built 1990 Load: 32.4 t ADT: 50

SIX POINTS RD

Good

Over: SUGAR CREEK

SIX PTS RD W I-55, McLean, IL

Built 1991 Load: 32.4 t ADT: 2,200

TR 323

Good

Over: BR SUGAR CREEK

2.5 MI NNW SHIRLEY, McLean, IL

Built 1992 Load: 32.4 t ADT: 1,050

TR 149

Good

Over: BRANCH ROCK CREEK

5.0 MI W CARLOCK, McLean, IL

Built 1978 Load: 32.4 t ADT: 25

TR 20

Good

Over: FUNKS CREEK

6.2 MI WSW CARLOCK, McLean, IL

Built 1978 Load: 32.4 t ADT: 75

TR 173

Good

Over: FUNKS CREEK

7.0 WSW CARLOCK, McLean, IL

Built 1980 Load: 32.4 t ADT: 200

TR 4

Good

Over: WHITTEN BRANCH

5.5 MI SW DANVERS, McLean, IL

Built 1984 Load: 32.4 t ADT: 25

TR 243

Good

Over: PHEASANTCR

4.0 MI SW DANVERS, McLean, IL

Built 1990 Load: 32.4 t ADT: 50

TR 76

Good

Over: BR ROCK CREEK

1.2 MI WS CARLOCK, McLean, IL

Built 1993 Load: 32.4 t ADT: 75

TR 175

Good

Over: BR ROCK CREEK

1.5 MI SW CARLOCK, McLean, IL

Built 1997 Load: 32.4 t ADT: 150

TR 36

Good

Over: TRIB OF ROCK CREEK

5.5 MI W CARLOCK, McLean, IL

Built 2001 Load: 32.4 t ADT: 150

FAS 488

Good

Over: BRANCH ROCK CREEK

2.0 MI W CARLOCK, McLean, IL

Built 2007 Load: 32.4 t ADT: 400

FAS 488

Good

Over: W FORK SUGAR CREEK

N EDGE OF DANVERS, McLean, IL

Built 2007 Load: 32.4 t ADT: 300

FAS 1481 CH 24

Good

Over: WEST FORK SUGAR CR

3 MI N STANFORD, McLean, IL

Built 2004 Load: 32.4 t ADT: 900

TR 394/HOLDER RD

Good

Over: TRIB KICKAPOO CR

5.0 MI WSW ELLSWORTH, McLean, IL

Built 2007 Load: 32.4 t ADT: 200

FAS 1485/HOLDER RD

Good

Over: KICKAPOO CREEK

5.0 MI WNW ELLSWORTH, McLean, IL

Built 2006 Load: 32.4 t ADT: 225

CH 36

Good

Over: Salt Creek

2 MI SSW Ellsworth, McLean, IL

Built 2014 Load: 32.4 t ADT: 100

TR 390A

Good

Over: W FORK SALT CR

4.0 MI SE DOWNS, McLean, IL

Built 1977 Load: 32.4 t ADT: 75

FAS 1480 CH 36

Good

Over: LITTLE KICKAPOO CR

2.0 MI W DOWNS, McLean, IL

Built 1985 Load: 32.4 t ADT: 200

TR 302

Good

Over: LITTLE KICKAPOO CR

3 MI SW DOWNS, McLean, IL

Built 1991 Load: 32.4 t ADT: 50

TR 501

Good

Over: BR SALT CK

3.0 MI SW DOWNS, McLean, IL

Built 1994 Load: 32.4 t ADT: 50

CH 27

Good

Over: WEST FORK SALT CREEK

3.5 MI SSE DOWNS, McLean, IL

Built 2000 Load: 32.4 t ADT: 125

TR 517

Good

Over: UNNAMED STREAM

3.8 MI SW DOWNS, McLean, IL

Built 2003 Load: 32.4 t ADT: 75

TR 330

Good

Over: LITTLE KICKAPOO CR

1 MILE S DOWNS, McLean, IL

Built 2006 Load: 32.4 t ADT: 50

FAU-6431 (CH-29)

Good

Over: Kickapoo Creek

2 MI W OF DOWNS, McLean, IL

Built 2017 Load: 32.4 t ADT: 775

TR 134 / 975E

Good

Over: Kings Mill Creek

1.5 M SW Yutton, McLean, IL

Built 2013 Load: 32.4 t ADT: 75

TR 569

Good

Over: N.FK SALT CREEK

1.0 MI S LEROY, McLean, IL

Built 1981 Load: 32.4 t ADT: 25

TR569

Good

Over: BR. N. FORK SALT CR.

1.0 MI S LEROY, McLean, IL

Built 1980 Load: 32.4 t ADT: 25

TR 462

Good

Over: N. FORK SALT CR.

4.0 MI NNE LEROY, McLean, IL

Built 1980 Load: 32.4 t ADT: 100

TR 449

Good

Over: N FORK SALT CREEK

3.0 MI NE LEROY, McLean, IL

Built 1981 Load: 32.4 t ADT: 50

TR 5 (020 INV.CO)

Good

Over: N.FORK SALT CREEK

4.0 MI S LEROY, McLean, IL

Built 1997 Load: 32.4 t ADT: 75

CH 21

Good

Over: TRIB OF SALT CR

3.0 MI N LEROY, McLean, IL

Built 2005 Load: 32.4 t ADT: 1,450

TR 483

Good

Over: TIMBER CR

0.5 MI W FUNKS GROVE, McLean, IL

Built 1977 Load: 32.4 t ADT: 75

FAS 482 CH 41

Good

Over: TIMBER CREEK

3.0MI NE FUNDS GROVE, McLean, IL

Built 1989 Load: 32.4 t ADT: 225

TR 130

Good

Over: BR KICKPOO CREEK

5.0 MI ESE MCLEAN, McLean, IL

Built 1989 Load: 32.4 t ADT: 25

TR 84

Good

Over: SUGAR CREEK

1.8 MI NW/FUNKS GR, McLean, IL

Built 2002 Load: 32.4 t ADT: 75

FAS 482 CH 41

Good

Over: TIMBER CREEK

3.5MI ENE FUNKSGROVE, McLean, IL

Built 1999 Load: 32.4 t ADT: 225

TR 112

Good

Over: PRAIRIE CREEK

3.0 MI ENE MCLEAN, McLean, IL

Built 2012 Load: 32.4 t ADT: 50

TR 296A

Good

Over: BR MACKINAW RIVER

4.8 MI SW GRIDLEY, McLean, IL

Built 1983 Load: 32.4 t ADT: 75

TR 264

Good

Over: TRIB TO PANTHER CR

4.2 MI W GRIDLEY, McLean, IL

Built 1996 Load: 32.4 t ADT: 100

TR 5

Good

Over: UNNAMED STREAM

2.5 MI W GRIDLEY, McLean, IL

Built 1998 Load: 32.4 t ADT: 75

Showing 19,451-19,500 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.