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 255 SB

Unknown

Over: FAI 64

.75 MI SO BUNKUM RD, St. Clair, IL

Built 1981 ADT: 91,400

BUNKUM RD/ FAU 916

Unknown

Over: FAI 255

0.2MI N OF FAI 64, St. Clair, IL

Built 1985 ADT: 43,500

FOREST BLVD/FAU 91

Unknown

Over: FAI 255/HARDING DITH

1.4MI N FAI 64, St. Clair, IL

Built 1985 ADT: 43,500

I-255 SB

Unknown

Over: Black Lane, CSXRR, CSXRR

1.2 mi S of I-55/70, St. Clair, IL

Built 1985 ADT: 2,500

I-255 NB

Unknown

Over: CSXRR, CSXRR, Black Lane

1.2 mi S of I-55/70, St. Clair, IL

Built 1985 ADT: 2,500

I-55/64EB mainlne"

Unknown

Over: UPRR,IL 3 ramp,UPRR,UPRR

PIER BC1 TO ABUT C31, St. Clair, IL

Built 1967 ADT: 23,900

I-55/64WB mainlne"

Unknown

Over: UPRR,IL 3 Ramp,UPRR,UPRR

PIER BC1-> ABUT B31, St. Clair, IL

Built 1967 ADT: 5,300

I-55/64 CD WB "G"

Unknown

Over: Trendley Avenue

PIER G1 TO ABUT G14, St. Clair, IL

Built 1968 ADT: 275

IL15 Ramp G to SB2

Unknown

Over: IL 163

0.2mi S of IL 15, St. Clair, IL

Built 1979 ADT: 2,150

81ST ST/CH35

Unknown

Over: FAI 64/CD 360-361

1 MI WEST OF ILL 157, St. Clair, IL

Built 1969 ADT: 91,400

255NB Ramp E to IL

Unknown

Over: IL 163

0.2mi S of IL 15, St. Clair, IL

Built 1980 ADT: 2,150

US 50

Unknown

Over: CH 50/SUMERFIELD RD

.5M N OF SUMMERFIELD, St. Clair, IL

Built 1984 ADT: 375

Rieder Road TR 222

Unknown

Over: FAI 64

1.64 MI E OF ILL 158, St. Clair, IL

Built 2017 ADT: 41,900

MLK RAMP 1 EB

Unknown

Over: IL 3,TRRA,UPRR,MoAv,55-6

EAST APPROACH MLK, St. Clair, IL

Built 2000 ADT: 10

MLK RAMP 2 WB

Unknown

Over: IL 3,TRRA,UPRR,MoAv,55-6

WEST APPROACH MLK, St. Clair, IL

Built 1999 ADT: 1,800

IL 161 NB

Unknown

Over: DutchHollow,Metrolink,cr

2.2 mi SE of IL 157, St. Clair, IL

Built 1992 ADT: 475

IL 161 SB

Unknown

Over: DutchHollow,Metrolink,cr

2.2mi SE of IL 157, St. Clair, IL

Built 1992 ADT: 475

ILL 15 (WB)

Unknown

Over: STATE ST/FAU 9281

0.5M E OF IL 158, St. Clair, IL

Built 1995 ADT: 1,700

ILL 15 (EB)

Unknown

Over: STATE ST/FAU 9281

0.5 M E IL 158, St. Clair, IL

Built 1995 ADT: 1,700

FAI 64 EB

Unknown

Over: ILL 157

CASEYVILLE, St. Clair, IL

Built 2007 ADT: 11,600

FAI 64 WB

Unknown

Over: ILL 157

CASEYVILLE, St. Clair, IL

Built 2007 ADT: 11,600

I-64 EB

Unknown

Over: OLD COLLINSVILLE RD

1.01MI E IL 159, St. Clair, IL

Built 2007 ADT: 9,900

I-64 WB

Unknown

Over: OLD COLLINSVILLE RD

1.02MI E OF ILL 159, St. Clair, IL

Built 2007 ADT: 9,900

RELOCATED I-70 EB

Unknown

Over: 1ST STREET in E St L

0.4 mi N of I-55/64, St. Clair, IL

Built 2013 ADT: 900

RELOCATED I-70 WB

Unknown

Over: 1ST STREET in E ST L

0.4 mi N of I-55/64, St. Clair, IL

Built 2013 ADT: 900

I-70 EB

Unknown

Over: NSRR,TRRA,Industrial Ave

1.4 mi N of I-55/64, St. Clair, IL

Built 2013 ADT: 200

I-70 WB

Unknown

Over: NSRR,TRRA,Industrial Ave

1.4 mi N of I-55/64, St. Clair, IL

Built 2013 ADT: 200

EB I-70 Flyover Ra

Unknown

Over: I-55,64,Ramps,KCSRR, CSX

4th level of Quad-Level, St. Clair, IL

Built 2014 ADT: 2,950

EB 70 Ramp to EB 6

Unknown

Over: I-55 and ramps

Flyover ramp to EB64, St. Clair, IL

Built 2014 ADT: 74,500

WB 64 Ramp to WB 7

Unknown

Over: I-55/70,Ramps,CSXRR,KCSR

QuadLevel Flyover to 70WB, St. Clair, IL

Built 2014 ADT: 2,950

9TH STREET

Unknown

Over: FAI 64

East St. Louis, St. Clair, IL

Built 2013 ADT: 74,500

REL IL 3 -Packers

Unknown

Over: I-70

0.8 mi N of I-55/64, St. Clair, IL

Built 2013 ADT: 44,300

Rel. IL 3 (Packers

Unknown

Over: St. Clair Ave, TRRA

0.8 mi N of I-55/64, St. Clair, IL

Built 2013 ADT: 3,800

N GREENMOUNT RD

Unknown

Over: FAI 64

.87 MI S OF US 50, St. Clair, IL

Built 2001 ADT: 58,600

IL 158 NB

Unknown

Over: Trail,NSRR,Metrolink,Rd

0.5 mi W of Scott AFB, St. Clair, IL

Built 2001 ADT: 25

MLK EB to I-55/64

Unknown

Over: Reloc IL Rt 3/RR

0.7 mi E of Miss. River, St. Clair, IL

Built 2015 ADT: 1,600

MLK Bridge E Appr.

Unknown

Over: IL3,TRRA(UPRR),1st,MO Av

0.75 E Mississippi River, St. Clair, IL

Built 2018 ADT: 10

15TH ST-FAU 9155

Unknown

Over: FAI 64 in E ST Louis

0.79 E OF FAI 70, St. Clair, IL

Built 2012 ADT: 74,500

EXCHANGE AVENUE

Unknown

Over: I-55/70

E ST L AT BOWMAN YD, St. Clair, IL

Built 2011 ADT: 67,300

E ST L PED BRIDGE

Unknown

Over: INTERSTATE 64

W of 15th STREET, St. Clair, IL

Built 2010 ADT: 74,500

IL 157

Unknown

Over: creek,Metrolink,St Clair

1.2 mi S. of I-64, St. Clair, IL

Built 2017 ADT: 19,600

FAU 9212

Unknown

Over: UPPER CAHOKIA RD.

CAHOKIA AT PARKS AIR, St. Clair, IL

Built 1980 ADT: 250

MLK bridge

Unknown

Over: Miss.River,TRRA,Front,8t

East St. Louis, St. Clair, IL

Built 1950 ADT: 975

MLK BR APPR EB & W

Unknown

Over: RAMP TO WB MLK BR

0.1 Mi E 3rd ST EXIT, St. Clair, IL

Built 1961 ADT: 800

FAU 9172

Unknown

Over: CSX RR AND CITY ST

CITY OF O'FALLON, St. Clair, IL

Built 1998 ADT: 50

SCCTD Metro BK Lin

Unknown

Over: GREEN MOUNT FAU 9170

.68 M S of IL 161, St. Clair, IL

Built 2013 ADT: 15,600

SCCTD BIKE/PED TRA

Unknown

Over: IL 161

NEAR SWIC/METRO BR, St. Clair, IL

Built 2014 ADT: 10,400

SCCTD METRO BIKE L

Unknown

Over: FAU 9257 FULLERTON

.2 MI E of IL 161, St. Clair, IL

Built 2012 ADT: 6,850

TERMINAL R.R.

Unknown

Over: 9TH ST FAU 9213

E. ST. LOUIS, St. Clair, IL

Built 1900 ADT: 2,450

RAILROAD

Unknown

Over: FAU 9213 9TH ST

E. ST. LOUIS, St. Clair, IL

Built 1900 ADT: 2,450

Showing 3,451-3,500 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.