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

FAI 280 WB

Unknown

Over: US RT 67

IN MILAN, Rock Island, IL

Built 1967 ADT: 10,100

27TH ST - MOLINE

Unknown

Over: ROCK RIVER, SIDE RD

S EDGE MOLINE, Rock Island, IL

Built 1938 ADT: 275

IL 92 SB (CENT FRW

Unknown

Over: W. 27TH ST R.I.

.6 MI S 31ST ST R.I., Rock Island, IL

Built 1963 ADT: 50

IL 92 NB (CENT FRW

Unknown

Over: W. 27TH ST R.I.

.6 MI S 31ST ST R.I., Rock Island, IL

Built 1963 ADT: 50

IL 5 WB (J DEERE R

Unknown

Over: 27TH ST-MOLINE

S EDGE MOLINE, Rock Island, IL

Built 1966 ADT: 9,100

IL 5 EB (J DEERE R

Unknown

Over: 27TH ST-MOLINE

S EDGE MOLINE, Rock Island, IL

Built 1966 ADT: 9,100

IL 5 WB (J DEERE R

Unknown

Over: FAI 74

S EDGE MOLINE, Rock Island, IL

Built 1970 ADT: 39,500

IL 5 EB (J DEERE R

Unknown

Over: FAI 74

S EDGE MOLINE, Rock Island, IL

Built 1970 ADT: 31,500

23RD AVE-MOLINE

Unknown

Over: FAI 74

1.5 MI S ILL 92, Rock Island, IL

Built 1970 ADT: 39,500

27TH ST SB-MOLINE

Unknown

Over: FAI 74

.5 MI S 23RD AVE, Rock Island, IL

Built 1971 ADT: 39,500

19TH ST NB-MOLINE

Unknown

Over: FAI 74

.6 MI S 23RD AVE, Rock Island, IL

Built 1971 ADT: 39,500

FAI 74 SB

Unknown

Over: 36TH AVE - MOLINE

S EDGE MOLINE, Rock Island, IL

Built 1973 ADT: 14,000

FAI 74 NB

Unknown

Over: COALTOWN RD-MOLINE

S EDGE MOLINE, Rock Island, IL

Built 1973 ADT: 14,000

MOLINE RD (FAS 120

Unknown

Over: I-88

0.7 MI. E. OF I-80, Rock Island, IL

Built 1976 ADT: 18,900

226 ST N

Unknown

Over: I-88

1.7 MI E FAI 80, Rock Island, IL

Built 1976 ADT: 18,900

248 ST N

Unknown

Over: I-88

2.3 MI SW JCT ILL 92, Rock Island, IL

Built 1976 ADT: 18,900

265 ST N CH 4

Unknown

Over: I-88

0.9 MI SW JCT ILL 92, Rock Island, IL

Built 1976 ADT: 18,900

FAS 1204 ILL 92

Unknown

Over: I-88

8.0 MI. E. SILVIS, Rock Island, IL

Built 1975 ADT: 18,900

CH 25

Unknown

Over: I-88

5.MI. SW. HILLSDALE, Rock Island, IL

Built 1976 ADT: 13,500

TR 232 /300 TH ST

Unknown

Over: I-88

2.5 M. SW. HILLSDALE, Rock Island, IL

Built 1976 ADT: 13,500

PORT BYRON RD

Unknown

Over: I-88

1.5 MI. W.HILLSDALE, Rock Island, IL

Built 1975 ADT: 12,500

317TH ST N

Unknown

Over: I-88

1.0 MI. N.HILLSDALE, Rock Island, IL

Built 1976 ADT: 12,500

122ND AVE N

Unknown

Over: I-88

.2 MI W WHITESIDE CO, Rock Island, IL

Built 1976 ADT: 12,500

PEDESTRIAN WALKWAY

Unknown

Over: IL5-JOHN DEERE EXWY

E OF 7TH ST MOLINE, Rock Island, IL

Built 1987 ADT: 26,800

IL 5 WB (J DEERE R

Unknown

Over: OLD COALTOWN RD

AT THE S EDGE SIVIS, Rock Island, IL

Built 1999 ADT: 325

I-280 EB

Unknown

Over: AIRPORT ROAD

E. EDGE OF MILAN, Rock Island, IL

Built 2003 ADT: 9,000

I-280 WB

Unknown

Over: AIRPORT ROAD

E. EDGE OF MILAN, Rock Island, IL

Built 2004 ADT: 9,000

PEDESTRIAN OVERPAS

Unknown

Over: IL 5

IN BLACKHAWK ST. PK., Rock Island, IL

Built 1995 ADT: 7,400

MILAN BELTWAY

Unknown

Over: I-280

S. OF ROCK ISLAND, Rock Island, IL

Built 2006 ADT: 20,800

MILAN BELTWAY

Unknown

Over: AIRPORT RD

S. OF ROCK ISLAND, Rock Island, IL

Built 2006 ADT: 6,000

52ND AVE

Unknown

Over: MILAN BELTWAY

.04MI S JOHN DEER RD, Rock Island, IL

Built 2006 ADT: 19,400

FAI 74 SB

Unknown

Over: FAI 280

I74 OVR I280 S OF RR, Rock Island, IL

Built 2002 ADT: 20,800

27TH ST. - MOLINE

Unknown

Over: FAI 280

S EDGE MOLINE, Rock Island, IL

Built 2005 ADT: 20,800

IL 5/IL 92

Unknown

Over: IL 84

SILVIS INTERCHANGE, Rock Island, IL

Built 2008 ADT: 4,300

ILL 92

Unknown

Over: 18TH AVE-ROCK ISLAND

CENTENNIAL FRWY R.I., Rock Island, IL

Built 2009 ADT: 2,200

ILL 92 S.B.

Unknown

Over: 31ST ST-ROCK ISLAND

CENTENNIAL FRWY R.I., Rock Island, IL

Built 2008 ADT: 2,700

ILL 92 N.B.

Unknown

Over: 31ST ST-ROCK ISLAND

CENTENNIAL FRWY R.I., Rock Island, IL

Built 2009 ADT: 2,700

41ST ST. CONNECTOR

Unknown

Over: IL 5

.14MI W OF 38TH ST, Rock Island, IL

Built 2014 ADT: 38,900

I 74 NB

Unknown

Over: IL 92EB&WB(1-7TH AV)

APPROACH TO MISS RIV, Rock Island, IL

Built 2019 ADT: 8,000

I 74 SB

Unknown

Over: IL 92EB&WB(1-7TH AV)

APPROACH TO MISS RIV, Rock Island, IL

Built 2015 ADT: 200

I-74 WB

Unknown

Over: 19TH ST-MOLINE

0.5 MI N OF 23RD AVE, Rock Island, IL

Built 2019 ADT: 8,400

I-74 N.B. OFF RAMP

Unknown

Over: 19TH ST-MOLINE

1.1 MI S IOWA LINE, Rock Island, IL

Built 2019 ADT: 8,400

I-74 NB WB(NB)

Unknown

Over: 12TH AVE-MOLINE

0.7 MI N OF 23RD AVE, Rock Island, IL

Built 2019 ADT: 6,600

I-74 EB (SB)

Unknown

Over: 12TH AVE-MOLINE

0.7 MI N OF 23RD AVE, Rock Island, IL

Built 2020 ADT: 6,600

FAI 74 WB

Unknown

Over: 19TH ST S.B.-MOLINE

.2 MI N 23RD AVE, Rock Island, IL

Built 2019 ADT: 5,200

FAI 74 EB

Unknown

Over: 19TH ST S.B.-MOLINE

.2 MI S 23RD AVE, Rock Island, IL

Built 2019 ADT: 5,200

RAMP6THC

Unknown

Over: BNSF RR & 4TH AVE

IN MOLINE, Rock Island, IL

Built 2020 ADT: 6,500

RAMP 6TH D

Unknown

Over: BNSF RR & 4TH AVE

.75 mi S of Iowa Sta, Rock Island, IL

Built 2019 ADT: 8,000

IL 92 SB (CENT FRW

Unknown

Over: FAI 280

CENTENNIAL FRWY R.I., Rock Island, IL

Built 2012 ADT: 28,100

IL 92 NB (CENT FRW

Unknown

Over: FAI 280

CENTENNIAL FRWY R.I., Rock Island, IL

Built 2012 ADT: 19,700

Showing 3,201-3,250 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.