State profile · Near national median SD

Illinois bridge safety

Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Illinois — drawn straight from the FHWA National Bridge Inventory.

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

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 rated 0-4

Structurally Deficient

7.9%

2,186 bridges flagged for repair priority

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 — Structurally deficient share 26.3%
National avg

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

Condition Distribution

Bridge inventory deck-condition mix — Illinois (FHWA NBI)

Illinois41.185163825109036%36.47046101719353%7.879465090293047%7.879465090293047%GoodFairPoorStructurally Deficient
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 on the structurally deficient leaderboard (lower share = better)

States are ranked by share of bridges flagged structurally deficient — the FHWA classification for any span where deck, superstructure, or substructure carries a condition rating of 4 or below. Lower percentages indicate stronger maintenance funding and inspection follow-through. States here sit immediately above and below Illinois on the same metric.

44

Rhode Island

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

31

Nebraska

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

17

Illinois

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

25

Massachusetts

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

29

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 composite NBI rating. Each is inspected at least every 24 months.

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

Structurally Deficient

Over: WILSON CREEK

NE-35-T3NR2E, Fulton, IL

Built 1935 Load: 1.3 t ADT: 10

TR 10-B

Structurally Deficient

Over: KING CREEK

W EDGE OF MINERAL, Bureau, IL

Built 1899 Load: 1.6 t ADT: 10

TR-6

Structurally Deficient

Over: DRAINAGE DITCH

3.5 MI NE DIETERICH, Effingham, IL

Built 1909 Load: 1.6 t ADT: 25

TR208K(TWIN BRIDGE

Structurally Deficient

Over: BIG CREEK

NE EDGE MT ZION, Macon, IL

Built 1967 Load: 1.9 t ADT: 375

All Bridges in Illinois

FAI 280 EB

Unknown

Over: west 4TH ST MILAN

.2 MI W OF US 67, Rock Island, IL

Built 2012 ADT: 6,800

FAI 80 SB

Unknown

Over: BARSTOW ROAD

1.3 MI S ILL 5 & 92, Rock Island, IL

Built 2014 ADT: 375

16TH STREET

Unknown

Over: 3RD&4TH AV15TH ST&RR

NW CORNER OF MOLINE, Rock Island, IL

Built 1982 ADT: 2,200

12TH AVE

Unknown

Over: 15TH STREET

IN MOLINE, Rock Island, IL

Built 1991 ADT: 4,600

US 67

Unknown

Over: ILL 92, RR & MISS R

Btwn. Davenport & R.I., Rock Island, IL

Built 1940 ADT: 10,200

ILL 92

Unknown

Over: 11TH ST-ROCK ISLAND

CENTENNIAL FRWY R.I., Rock Island, IL

Built 1962 ADT: 450

ILL 92

Unknown

Over: 7TH ST-ROCK ISLAND

CENTENNIAL FRWY R.I., Rock Island, IL

Built 1962 ADT: 425

PEDESTRIAN OVERPAS

Unknown

Over: ILL 92 WB-38TH ST

AUGUSTANA COLLEGE RI, Rock Island, IL

Built 1975 ADT: 8,150

ICG RR

Unknown

Over: CH 16

SE CORNER STONEFORT, Saline, IL

Built 1900 ADT: 250

ICG RR

Unknown

Over: TR 243

3.5M W CARRIER MILLS, Saline, IL

Built 1900 ADT: 175

ILLINOIS CENTRAL R

Unknown

Over: I-55 / I-72 / US 36

.75M E 6TH ST, Sangamon, IL

Built 1962 ADT: 52,500

CWLP Private Road

Unknown

Over: I-55 / I-72 / US 36

.1M S STEVENSON INT, Sangamon, IL

Built 1963 ADT: 52,500

I-55 (NB)/ I-72 (E

Unknown

Over: IL 29 / SO GRAND AVE

I-55/IL 29 INT E SPI, Sangamon, IL

Built 1963 ADT: 16,700

I-55 (SB)/ I-72 (W

Unknown

Over: IL 29 / SO GRAND AVE

I-55/IL29 INT E SPI, Sangamon, IL

Built 1963 ADT: 16,700

NORFOLK SOUTHERN R

Unknown

Over: I-55

.3M S SANGAMON AV, Sangamon, IL

Built 1962 ADT: 39,300

I-55 (SB)

Unknown

Over: SANGAMON AVE / IL 54

I-55/IL54 INT NE SPI, Sangamon, IL

Built 1963 ADT: 16,700

I-55 (NB)

Unknown

Over: SANGAMON AVE / IL 54

I-55/IL54 INT NE SPI, Sangamon, IL

Built 1963 ADT: 10,700

I-55 (NB)

Unknown

Over: BL 55 & UP RR

SHERMAN INTERCHANGE, Sangamon, IL

Built 1962 ADT: 8,300

I-55 (SB)

Unknown

Over: BL 55 & UP RR

SHERMAN INTERCHANGE, Sangamon, IL

Built 1962 ADT: 8,300

6TH ST / BL 55 (NB

Unknown

Over: I-55 (SB)

.25M S I-72, Sangamon, IL

Built 1963 ADT: 39,400

ILLINOIS CENTRAL R

Unknown

Over: BUS 55 SB / 5TH ST.

S 5TH&STANFORD-SPFLD, Sangamon, IL

Built 1962 ADT: 14,100

11TH STREET

Unknown

Over: I-55 / I-72 / US 36

.45M E 6TH ST., Sangamon, IL

Built 1997 ADT: 40,900

IC&G RR

Unknown

Over: FAU 7985

.07MI E OF 18TH ST., Sangamon, IL

Built 1933 ADT: 6,200

CLEAR LAKE AVE (EB

Unknown

Over: I-55

CLEAR LK AVE E SPFLD, Sangamon, IL

Built 1963 ADT: 39,300

CLEAR LAKE/ I-72(W

Unknown

Over: I-55

I-55-CLR LK - E SPFD, Sangamon, IL

Built 1963 ADT: 39,300

OLD US 36

Unknown

Over: 7TH ST. RAMP (NB)

S EDGE RIVERTON, Sangamon, IL

Built 1958 ADT: 1,300

NORFOLK SOUTHERN R

Unknown

Over: OLD US 36 (FAS 631)

W EDGE ILLIOPOLIS, Sangamon, IL

Built 1952 ADT: 750

I-72 / US 36 (WB)

Unknown

Over: 6TH ST / BUS 55

S EDGE SPRINGFIELD, Sangamon, IL

Built 1963 ADT: 23,100

I-72 / US 36 (EB)

Unknown

Over: 6TH ST / BUS 55

S EDGE SPRINGFIELD, Sangamon, IL

Built 1963 ADT: 23,100

I-72 / US 36 (EB)

Unknown

Over: I-55 (SB)

.25M E 6TH ST., Sangamon, IL

Built 1962 ADT: 39,400

NEW CITY RD / CH 4

Unknown

Over: I-55/ PALM ROAD

1.8M S LK SPFLD BRDG, Sangamon, IL

Built 1969 ADT: 1,850

STEVENSON DR (EB)

Unknown

Over: I-55 / I-72 / US 36

SE EDGE SPFLD, Sangamon, IL

Built 1963 ADT: 52,500

STEVENSON DR (WB)

Unknown

Over: I-55 / I-72 / US 36

SE EDGE SPFLD, Sangamon, IL

Built 1963 ADT: 50,800

CH 1 / SHERMAN RD.

Unknown

Over: I-55

.5M S SHERMAN INTCHG, Sangamon, IL

Built 1963 ADT: 29,200

W LAKE SHORE DR

Unknown

Over: I-55 / I-72 / US 36

.8M SW STEVENSON INT, Sangamon, IL

Built 1963 ADT: 52,500

SOUTHWIND RD

Unknown

Over: I-55

1M S I-72/US 36, Sangamon, IL

Built 1968 ADT: 39,400

SUDDUTH RD. FAU 80

Unknown

Over: I-55

.5M N SHERMAN INTCHG, Sangamon, IL

Built 1962 ADT: 29,200

BISSELL ROAD

Unknown

Over: I-55

1.1M N SANGAMON AVE, Sangamon, IL

Built 1963 ADT: 29,200

RIDGELY RD

Unknown

Over: I-55

.5M S SANG AV/IL 54, Sangamon, IL

Built 1963 ADT: 39,300

MUN 2110E (Cook St

Unknown

Over: I-55 / I-72 / US 36

.45 E FAP 75 Dirksen, Sangamon, IL

Built 1963 ADT: 51,900

S SECOND ST RD

Unknown

Over: I-72 / US 36

.5M W I-55/6TH ST, Sangamon, IL

Built 1966 ADT: 40,900

DIVERNON RD/ FAS 6

Unknown

Over: I-55

3M N MONTGOMERY CO., Sangamon, IL

Built 1972 ADT: 31,100

I-55 (NB)

Unknown

Over: IL 104 / I & M RR

1.5M N DIVERNON INT, Sangamon, IL

Built 1972 ADT: 5,450

I-55 (SB)

Unknown

Over: IL 104 / I & M RR

1.5M N DIVERNON INT, Sangamon, IL

Built 1972 ADT: 6,800

HORSE FARM RD.

Unknown

Over: I-55

1.8M N IL 104, Sangamon, IL

Built 1972 ADT: 35,700

PULLIAM RD/TR 355

Unknown

Over: I-55

2.2M N GLENARM INTCH, Sangamon, IL

Built 1971 ADT: 1,200

E LAKE SHORE DR

Unknown

Over: I-55

.5M S LK SPFLD BRG, Sangamon, IL

Built 1969 ADT: 43,800

TORONTO RD

Unknown

Over: I-55

1M N LK SPFLDBRIDGE, Sangamon, IL

Built 1968 ADT: 39,400

UPRR

Unknown

Over: I-72

.5 M W IL 4, Sangamon, IL

Built 1969 ADT: 20,300

COCKRELL LN

Unknown

Over: I-72 / US 36

.7M W IL 4/VETERANS, Sangamon, IL

Built 1969 ADT: 20,300

Showing 3,251-3,300 of 27,743 bridges

Related

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

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). A "structurally deficient" rating is a repair-priority signal, not a closure or unsafe-to-cross designation. Consult a qualified civil engineer before making decisions based on this data.

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.