Total Bridges
27,743
Public highway bridges in Illinois
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
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)
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
31
Nebraska
7.73% top marginal rate
17
Illinois
7.88% top marginal rate
25
Massachusetts
7.96% top marginal rate
29
Missouri
8.53% top marginal rate
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
PoorOver: DRAINAGE CANAL
2.2 MI E MEYER, Adams, IL
Built 1980 Load: 0.6 t ADT: 200
CH 15
PoorOver: 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 DeficientOver: WILSON CREEK
NE-35-T3NR2E, Fulton, IL
Built 1935 Load: 1.3 t ADT: 10
TR 10-B
Structurally DeficientOver: KING CREEK
W EDGE OF MINERAL, Bureau, IL
Built 1899 Load: 1.6 t ADT: 10
TR-6
Structurally DeficientOver: DRAINAGE DITCH
3.5 MI NE DIETERICH, Effingham, IL
Built 1909 Load: 1.6 t ADT: 25
TR208K(TWIN BRIDGE
Structurally DeficientOver: BIG CREEK
NE EDGE MT ZION, Macon, IL
Built 1967 Load: 1.9 t ADT: 375
All Bridges in Illinois
I- 55 EB STEVENSON
UnknownOver: LOOMIS & FULLER STS
0.9 M SW I94, Cook, IL
Built 1964 ADT: 4,800
I- 55 EB STEVENSON
UnknownOver: THROOP ST
0.7 M SW I94, Cook, IL
Built 1963 ADT: 2,350
I- 55 WB STEVENSON
UnknownOver: THROOP ST
0.7 M SW I94, Cook, IL
Built 1963 ADT: 2,350
I- 55 EB STEVENSON
UnknownOver: HALSTED ST
0.2 M SW I94, Cook, IL
Built 1964 ADT: 12,100
I- 55 WB STEVENSON
UnknownOver: HALSTED ST
0.2 M SW I94, Cook, IL
Built 1964 ADT: 12,100
IL 171 WB (ARCHER)
UnknownOver: US 45 SB RMP 2 I294
0.3 M E US 45, Cook, IL
Built 2021 ADT: 17,300
IL 171 EB (ARCHER)
UnknownOver: 79TH ST WB
0.8 M E US 45, Cook, IL
Built 2021 ADT: 19,500
I- 55 S RMP I-90,9
UnknownOver: I- 55 STEVENSON
0.6 M E I94, Cook, IL
Built 1965 ADT: 86,900
GM&O RR
UnknownOver: I-55 RP TO ASHLAND
0.14 M W ASHLD P5C, Cook, IL
Built 1964 ADT: 16,900
I- 57 SB
UnknownOver: I- 80 EB
3.1 M S US 6, Cook, IL
Built 1964 ADT: 83,700
I- 57 NB
UnknownOver: I- 80 EB
3.1 M S US 6, Cook, IL
Built 1964 ADT: 83,700
I- 57 NB
UnknownOver: DIXIE HWY
0.2 M NE IL 83, Cook, IL
Built 1967 ADT: 6,700
I- 57 SB
UnknownOver: DIXIE HWY
0.2 M NE IL 83, Cook, IL
Built 1967 ADT: 6,700
I- 57 NB
UnknownOver: L.CAL.RIV.& THN.RD.
1.5 M NE ILL 83, Cook, IL
Built 1966 ADT: 5,250
I- 57 SB
UnknownOver: L.CAL.RIV.& THN.RD.
1.5 M NE ILL 83, Cook, IL
Built 1966 ADT: 5,250
I- 57 SB
UnknownOver: LITTLE CAL RIV,BROAD
0.75 M S 127TH, Cook, IL
Built 1967 ADT: 4,300
I- 57 NB
UnknownOver: LITTLE CAL RIV,BROAD
0.75 M S 127TH, Cook, IL
Built 1967 ADT: 4,300
I- 57 SB
UnknownOver: VERMONT ST
2.5 NE ILL 83, Cook, IL
Built 1966 ADT: 12,100
I- 57 NB
UnknownOver: VERMONT ST
2.5 NE ILL 83, Cook, IL
Built 1966 ADT: 12,100
RR - METRA
UnknownOver: I- 57
3.7 M SW ILL 1, Cook, IL
Built 1966 ADT: 124,100
BIKE PATH (CLSD.RR
UnknownOver: I- 57
.1 M N OF 107TH ST, Cook, IL
Built 1966 ADT: 140,600
RR - UP
UnknownOver: I- 57
0.5 M E IL 1, Cook, IL
Built 1962 ADT: 139,400
I- 57 NB
UnknownOver: I- 94 SB BF & CTA RR
1 M E IL 1, Cook, IL
Built 1960 ADT: 179,500
I- 80 EB
UnknownOver: IL 50 (CICERO AVE)
0.5 M E I-57, Cook, IL
Built 1966 ADT: 17,100
I- 80 WB
UnknownOver: IL 50 (CICERO AVE)
0.5 M E I-57, Cook, IL
Built 1966 ADT: 17,100
I- 80 WB
UnknownOver: 175TH ST
0.7 M E I-57, Cook, IL
Built 1966 ADT: 7,500
I- 80 EB
UnknownOver: 175TH ST
0.7 M E I-57, Cook, IL
Built 1964 ADT: 7,500
I- 80 EB
UnknownOver: KEDZIE AVE
3.0 M E OF I-57, Cook, IL
Built 1966 ADT: 20,700
I- 80 WB
UnknownOver: KEDZIE AVE
3.0 M E OF I-57, Cook, IL
Built 1966 ADT: 20,700
I-290 WB
UnknownOver: IL 56 (BUTTERFIELD)
1.6 M W US 45, Cook, IL
Built 1959 ADT: 13,800
I-290 EB
UnknownOver: IL 56 (BUTTERFIELD)
1.6 M W US 45, Cook, IL
Built 1959 ADT: 13,800
I-290 EB
UnknownOver: I- 88 EW TOLL-IL 110 CKC
1.5 M W US 45, Cook, IL
Built 1953 ADT: 102,400
I-290 IKE-IL 110 C
UnknownOver: WOLF RD
1 M W US 45, Cook, IL
Built 1952 ADT: 12,500
IHB RR
UnknownOver: I-290 IKE
0.8 M E US 45 P20, Cook, IL
Built 1952 ADT: 160,200
CTA
UnknownOver: I-290 IKE
0.5 M W ILL 43 P20, Cook, IL
Built 1959 ADT: 163,500
B&O RR
UnknownOver: I-290 IKE
0.5 M W ILL 43 P20, Cook, IL
Built 1959 ADT: 163,500
I-290 EB IKE-IL 11
UnknownOver: CENTRAL AVE
1 M W IL 50, Cook, IL
Built 1957 ADT: 15,500
I-290 WB IKE-IL 11
UnknownOver: CENTRAL AVE
1 M W IL 50, Cook, IL
Built 1957 ADT: 15,500
BRC RR
UnknownOver: I-290 IKE & CTA
0.25 M E ILL 50 P4C, Cook, IL
Built 1955 ADT: 181,400
RR - NS & UP
UnknownOver: I-290 - IL 110 & CTA
0.25 MI W OF WESTERN, Cook, IL
Built 1952 ADT: 175,100
PAULINA ST
UnknownOver: I-290 - IL 110 & CTA
1.1 M W IL 1, Cook, IL
Built 1954 ADT: 172,800
I- 94 EDENS
UnknownOver: GOLF RD
GOLF RD, Cook, IL
Built 1949 ADT: 23,000
I- 94 EDENS
UnknownOver: FOREST GLEN AVE
0.7 M N FOSTER, Cook, IL
Built 1949 ADT: 3,300
I- 94 EDENS
UnknownOver: IL 50 (CICERO AVE)
0.5 M N FOSTER, Cook, IL
Built 1948 ADT: 13,800
RR - UP
UnknownOver: I- 94 EDENS
0.4 M N I-90, Cook, IL
Built 1958 ADT: 142,300
I- 94 SB EDENS
UnknownOver: I- 90 WB JFK & CTA
AT MONTROSE, Cook, IL
Built 1957 ADT: 138,300
I- 90,94 NWB JFK
UnknownOver: KOSTNER AVE
0.5 M SE IL 50, Cook, IL
Built 1957 ADT: 2,750
I- 90,94 SEB JFK
UnknownOver: KOSTNER AVE
0.5 M SE IL 50, Cook, IL
Built 1957 ADT: 2,750
I- 90,94 NWB JFK
UnknownOver: KEELER AVE
0.9 M SE IL 50, Cook, IL
Built 1957 ADT: 13,650
I- 90,94 SEB &RV J
UnknownOver: KEELER AVE
0.1 M NW IL 19, Cook, IL
Built 1957 ADT: 13,650
Showing 301-350 of 27,743 bridges
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.
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |