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

DESPLAINES ST

Unknown

Over: RR TRACKS-WAYMAN ST.

630W.&400N.TO 320N., Cook, IL

Built 1981 ADT: 550

COLUMBUS DR

Unknown

Over: LOWER E NORTH WATER ST

300E& 400N.TO 500N., Cook, IL

Built 1982 ADT: 2,100

STETSON AVENUE

Unknown

Over: LOWER LEVEL STETSON

154E 200N TO 300N, Cook, IL

Built 1986 ADT: 400

I294 RAMP

Unknown

Over: IL19

294SB TO IL19EB, Cook, IL

Built 2006 ADT: 33,600

I-90 Cash Toll Lan

Unknown

Over: Des Plaines River Rd

0.40 MI E of I-294, Cook, IL

Built 2006 ADT: 28,600

Coffey Rd

Unknown

Over: US12/45

.6M S of IL72, Cook, IL

Built 2018 ADT: 28,700

Englewood Line

Unknown

Over: S. Damen Ave.

0.07 MI N of 59th St, Cook, IL

Built 1903 ADT: 12,900

Englewood Line

Unknown

Over: S. Winchester Ave.

0.07 MI N OF 59th St., Cook, IL

Built 1903 ADT: 5,000

Englewood Line

Unknown

Over: S. Wolcott Ave.

0.07 MI N OF 59th St., Cook, IL

Built 1903 ADT: 4,500

Englewood Line

Unknown

Over: S. Honore St.

0.07 MI N OF 59th St., Cook, IL

Built 1903 ADT: 4,300

Englewood Line

Unknown

Over: S. Wood St.

0.07 MI N OF 59th St., Cook, IL

Built 1903 ADT: 4,200

Englewood Line

Unknown

Over: S. Paulina St.

0.07 MI N OF 59th St., Cook, IL

Built 1903 ADT: 4,200

Englewood Line

Unknown

Over: S. Ashland Ave.

S Ashland N W 59th, Cook, IL

Built 1903 ADT: 19,900

Englewood Line

Unknown

Over: S. Justine St.

S Justine N W 59th, Cook, IL

Built 1903 ADT: 4,200

Englewood Line

Unknown

Over: S. Laflin St.

S Laflin N W 59th St, Cook, IL

Built 1903 ADT: 4,600

Englewood Line

Unknown

Over: S. Bishop St.

S Bishop N W 59th St, Cook, IL

Built 1903 ADT: 3,800

I-90 SKYWAY

Unknown

Over: M L KING DR

0.15 MINW KEEFE AVE, Cook, IL

Built 1958 ADT: 7,950

I-90 SKYWAY

Unknown

Over: KEEFE AVE

AT 69TH P7C, Cook, IL

Built 1958 ADT: 9,550

I-90 SKYWAY

Unknown

Over: 73RD ST

1.5 M SE I94 P7C, Cook, IL

Built 1958 ADT: 2,100

I-90 SKYWAY

Unknown

Over: STONY ISLAND AVE

0.1 M S 79TH P7C, Cook, IL

Built 1958 ADT: 33,700

I-90 SKYWAY

Unknown

Over: ELLIOTT AVE

0.5 M SE 79TH P7C, Cook, IL

Built 1958 ADT: 1,300

I-90 SKYWAY

Unknown

Over: 86TH ST

0.2 M SE 85TH P7C, Cook, IL

Built 1958 ADT: 700

I-90 SKYWAY EB

Unknown

Over: 87TH ST

0.1 M W S CHGO AVE P, Cook, IL

Built 1958 ADT: 7,800

I-90 SKYWAY WB

Unknown

Over: 87TH ST

0.1 W S CHGO AVE P7C, Cook, IL

Built 1958 ADT: 7,800

I-90 SKYWAY

Unknown

Over: EXCHANGE AVE

AT 93RD P8C, Cook, IL

Built 1958 ADT: 2,250

TO I-90 SKYWAY WB

Unknown

Over: STATE ST

AT 66TH P7C, Cook, IL

Built 1961 ADT: 8,050

I-90 SKYWAY

Unknown

Over: COMMERCIAL AVE

AT COMMERCIAL AVE, Cook, IL

Built 1958 ADT: 7,600

I-90 SKYWAY

Unknown

Over: 95TH ST(US12 & 20)

0.22 M SE COMM AV, Cook, IL

Built 1958 ADT: 6,150

I-90 SKYWAY

Unknown

Over: 96TH ST & BRC RR

0.36 M SE COMM AV, Cook, IL

Built 1958 ADT: 500

I-90 SKYWAY

Unknown

Over: AVE "M"

0.11 M NW 100TH, Cook, IL

Built 1958 ADT: 1,950

I-90 SKYWAY

Unknown

Over: EWING,100TH & AVE"L"

AT 100TH ST, Cook, IL

Built 1958 ADT: 16,300

TO I-90 SKYWAY

Unknown

Over: US12,20,41 INDIANAPO

0.03 M NW 106TH, Cook, IL

Built 1958 ADT: 16,300

I-90 SKYWAY

Unknown

Over: MARQUETTE RD(67TH)

0.4 M E I94 P7C, Cook, IL

Built 1958 ADT: 15,300

I-90 SKYWAY

Unknown

Over: 75TH ST & GRNWOOD AV

2 M SE I94 P7C, Cook, IL

Built 1958 ADT: 8,300

I-90 SKYWAY

Unknown

Over: 76TH ST,NI PL & ICRR

0.18 M SE 75TH P7C, Cook, IL

Built 1958 ADT: 7,600

I-90 SKYWAY

Unknown

Over: AVALON ST

0.28 M SE 75TH P7C, Cook, IL

Built 1958 ADT: 225

I-90 SKYWAY

Unknown

Over: GROUND SE AVALON ST

0.33 M SE 75TH P7C, Cook, IL

Built 1958 ADT: 225

I-90 SKYWAY

Unknown

Over: DANTE AVE

0.49 M SE 75TH, Cook, IL

Built 1958 ADT: 1,450

I-90 SKYWAY

Unknown

Over: 79TH ST

0.1 M W OF STONY ISL, Cook, IL

Built 1958 ADT: 9,100

STONY ISL SB TO E

Unknown

Over: STONY 79TH,S CHGO

AT STONY,79TH&S CHI, Cook, IL

Built 1958 ADT: 33,700

STONY ISL SB TO E

Unknown

Over: I-90,STONY IS & RR

0.14 M S 79TH P7C, Cook, IL

Built 1958 ADT: 28,700

STONY ISL SB TO E

Unknown

Over: EAST END AV

0.04 M E CORNELL P, Cook, IL

Built 1958 ADT: 900

I-90WB TO NB STONY

Unknown

Over: STONY, 79TH & S. CHG

AT STONY,79TH&S CHI, Cook, IL

Built 1958 ADT: 9,100

I-90WB TO NB STONY

Unknown

Over: EAST END AVE

0.04 M SE CORNELL, Cook, IL

Built 1958 ADT: 900

LAKE SHORE DR

Unknown

Over: WACKER DRIVE

500E.& 340N., Cook, IL

Built 1986 ADT: 13,650

LAKE SHORE DR NB

Unknown

Over: RANDOLPH ST.& LAND

500E.& 340N.TO 130N., Cook, IL

Built 1986 ADT: 12,200

SB-LSD

Unknown

Over: RANDOLPH ST & LAND

500E.& 340N.TO 130N., Cook, IL

Built 1986 ADT: 12,200

LAKE ST E

Unknown

Over: INT LEVEL-LAKE STR

200N.&151E.TO 300E., Cook, IL

Built 1986 ADT: 1,900

NORTH WATER ST

Unknown

Over: LwerLevel N WATER ST

400 N & 301E TO 341E, Cook, IL

Built 1992 ADT: 2,100

NORTH WATER ST

Unknown

Over: L.L.NORTH WATER ST

COLUMBUS TO ST.CLAIR, Cook, IL

Built 1992 ADT: 2,100

Showing 1,251-1,300 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.