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

ILL 72

Good

Over: STREAM

0.64 MI E SHANNON ST, Carroll, IL

Built 2007 Load: 32.4 t ADT: 3,100

IL 72

Good

Over: DRAINAGE

0.14 MI E GOLD MINE, Carroll, IL

Built 2007 Load: 32.4 t ADT: 3,100

W CAMP CREEK ROAD

Good

Over: CAMP CREEK

6.5 M N OF SAVANNA, Carroll, IL

Built 1982 Load: 32.4 t ADT: 25

N ELIZABETH ROUTE

Good

Over: BRANCH OF PLUM R

6 MI NW MT.CARROLL, Carroll, IL

Built 1965 Load: 32.4 t ADT: 275

N ELIZABETH ROUTE

Good

Over: PLUM RIVER

4MILES NW MT.CARROLL, Carroll, IL

Built 1961 Load: 32.4 t ADT: 450

W POLSGROVE ROAD

Good

Over: BR OF PLUM RIVER

5 MI NW MT CARROLL, Carroll, IL

Built 1979 Load: 32.4 t ADT: 75

N BLUE MOUNTAIN RD

Good

Over: BRNCH OF PLUM RIVER

5.5 MI N MT. CARROLL, Carroll, IL

Built 2004 Load: 32.4 t ADT: 10

N OAKTON RD

Good

Over: CAMP CR

3 MI NE SAVANNA, Carroll, IL

Built 1986 Load: 32.4 t ADT: 50

SPUR ROAD

Good

Over: PLUM RIVER

5 MI. NW MT CARROLL, Carroll, IL

Built 1996 Load: 32.4 t ADT: 10

N LORAN ROUTE

Good

Over: E FORK PLUM RIVER

4 MI NE MT CARROLL, Carroll, IL

Built 1954 Load: 32.4 t ADT: 200

ZIER ROAD

Good

Over: FORK OF E PLUM RIVER

4 MI NW OF LANARK, Carroll, IL

Built 2000 Load: 32.4 t ADT: 900

N BROWNING ROAD

Good

Over: BRANCH E PLUM RIVER

3 MI. NW. OF LANARK, Carroll, IL

Built 2007 Load: 32.4 t ADT: 225

LOVERS SPRING RD

Good

Over: BR E FORK PLUM RIVER

2.25 MI. N. LANARK, Carroll, IL

Built 1996 Load: 32.4 t ADT: 25

NORTH OGLE ROAD

Good

Over: BR OF ELKHORN CREEK

7.5 MI E OF LANARK, Carroll, IL

Built 1980 Load: 32.4 t ADT: 50

ASHBY RD

Good

Over: BRANCH OF PLUM RIVER

5 MI. SE OF SAVANNA, Carroll, IL

Built 1997 Load: 32.4 t ADT: 175

W VINEGAR HILL ROA

Good

Over: JOHNSON CREEK

1.2 MILE N ARGO FAY, Carroll, IL

Built 2004 Load: 32.4 t ADT: 25

S. DAGGERT RD (TR8

Good

Over: JOHNSON CREEK

.5 MI SE MT CARROLL, Carroll, IL

Built 1989 Load: 32.4 t ADT: 25

N CENTER DRIVE

Good

Over: BR STRADDLE CREEK

1 MI E OF LANARK, Carroll, IL

Built 1987 Load: 32.4 t ADT: 200

WILLOW RD

Good

Over: ROCK CREEK

2 MI. S. OF LANARK, Carroll, IL

Built 1998 Load: 32.4 t ADT: 50

DIMON ROAD

Good

Over: ROCK CREEK

2.5MI NE CHADWICK, Carroll, IL

Built 2008 Load: 32.4 t ADT: 20

WILLOW RD

Good

Over: OTTER CREEK

3.0 MI SE LANARK, Carroll, IL

Built 2016 Load: 32.4 t ADT: 75

SOUTH GRANGE RD

Good

Over: BR OF MIDDLE CREEK

7 MI. SE. OF LANARK, Carroll, IL

Built 1995 Load: 32.4 t ADT: 25

E ELM RD

Good

Over: MIDDLE CREEK

3MI SW OF BROOKVILLE, Carroll, IL

Built 2014 Load: 32.4 t ADT: 25

ARGO FAY RTE

Good

Over: SAND CREEK

4.5 MI. W. CHADWICK, Carroll, IL

Built 1989 Load: 32.4 t ADT: 300

CREAMERY RD

Good

Over: OTTER CREEK

5 MI S OF ARGO FAY, Carroll, IL

Built 1993 Load: 32.4 t ADT: 50

TR-34 ThomsonRdSpu

Good

Over: Branch Johnson Creek

2.5M E of Thomson, Carroll, IL

Built 1997 Load: 32.4 t ADT: 50

OIL VALLEY SHOOL R

Good

Over: SAND CREEK

N EDGE OF ARGO FAY, Carroll, IL

Built 2011 Load: 32.4 t ADT: 200

SO SCHOOL ROAD

Good

Over: BR OF ROCK CREEK

2.5 M S OF CHADWICK, Carroll, IL

Built 1984 Load: 32.4 t ADT: 50

SOUTH DAMBMAN ROAD

Good

Over: BRANCH ROCK CREEK

4 MI W MILLEDGEVILLE, Carroll, IL

Built 1987 Load: 32.4 t ADT: 25

DUTCH TOWN ROAD

Good

Over: OTTER CREEK

2 M NW MILLEDGEVILLE, Carroll, IL

Built 1977 Load: 32.4 t ADT: 475

E FAIRHAVEN ROAD

Good

Over: ROCK CREEK

4 M SW MILLEDGEVILLE, Carroll, IL

Built 1980 Load: 32.4 t ADT: 100

E FAIRHAVEN ROAD

Good

Over: OTTER CREEK

3 M SW MILLEDGEVILLE, Carroll, IL

Built 1983 Load: 32.4 t ADT: 100

TELEGRAPH RD-TR 13

Good

Over: OTTER CREEK

3 MI N MILLEDGEVILLE, Carroll, IL

Built 1993 Load: 32.4 t ADT: 225

DUCK ROAD

Good

Over: ELKHORN CREEK

1 MI NE MILLEDGEVILL, Carroll, IL

Built 2000 Load: 32.4 t ADT: 50

THOMPSON RD. TR 19

Good

Over: ROCK CREEK

4 MI W MILLEDGEVILLE, Carroll, IL

Built 2006 Load: 32.4 t ADT: 25

S LOVERS LANE

Good

Over: ELKHORN CREEK

2 MI SE MILLEDGEVILL, Carroll, IL

Built 2014 Load: 32.4 t ADT: 50

FAS 1084 / CH 8

Good

Over: BNSF RR

2 MI NW MILLEDGEVILL, Carroll, IL

Built 2021 Load: 32.4 t ADT: 450

SOUTH EAGLE ROAD

Good

Over: EAGLE CREEK

2 M NE MILLIDGEVILLE, Carroll, IL

Built 1981 Load: 32.4 t ADT: 25

E. MILLEDGEVILLE R

Good

Over: BRANCH OF ELKHORN CR

3 MI E MILLEDGEVILLE, Carroll, IL

Built 1988 Load: 32.4 t ADT: 850

BARCLAY RD

Good

Over: GOOSE CREEK

5MI. ESE MILLEDGEVIL, Carroll, IL

Built 1998 Load: 32.4 t ADT: 50

EAGLE POINT RD

Good

Over: EAGLE CREEK

4.5 M NE MILLEDGEVIL, Carroll, IL

Built 2003 Load: 32.4 t ADT: 125

TR199, SUNSHINE RD

Good

Over: BNSF LINE IL LS3

2MI E MILLEDGEVILLE, Carroll, IL

Built 2012 Load: 32.4 t ADT: 100

CH 11

Good

Over: COX CREEK

2.75 MI W NEWMANSVIL, Cass, IL

Built 2001 Load: 32.4 t ADT: 100

CH 11

Good

Over: PANTHER CREEK

5 MI SW NEWMANSVILLE, Cass, IL

Built 2001 Load: 32.4 t ADT: 75

FAS1576

Good

Over: PRAIRIE CREEK

3 MI NE ARENZVILLE, Cass, IL

Built 2005 Load: 32.4 t ADT: 350

FAS 580

Good

Over: INDIAN CR

SWCL ARENZVILLE, Cass, IL

Built 2009 Load: 32.4 t ADT: 525

TR 20

Good

Over: COX CREEK

2.3M SE CHANDLERVILL, Cass, IL

Built 1998 Load: 32.4 t ADT: 75

TR-105

Good

Over: CLEAR CREEK

3 MI W HAGENER, Cass, IL

Built 1997 Load: 32.4 t ADT: 100

TR 163

Good

Over: LITTLE INDIAN CR

0.60 mi E TR 118, Cass, IL

Built 2015 Load: 32.4 t ADT: 125

TR 142

Good

Over: LTL INDIAN CR

.67 mi N TR 143, Cass, IL

Built 2013 Load: 32.4 t ADT: 25

Showing 15,401-15,450 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.