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
CONSL RR
UnknownOver: FAS 781/ACADEMY ST
1.09M S US 40, Bond, IL
Built 1943 ADT: 1,000
CONRAIL RR
UnknownOver: TR 112
2.75 M NE POCAHONTAS, Bond, IL
Built 1900 ADT: 100
BURL'TON NORTHERN
UnknownOver: WEST STREET
WEST CORP LIM. SOREN, Bond, IL
Built 1940 ADT: 200
US 20 EB
UnknownOver: I-90
.11 MI E WHEELER RD, Boone, IL
Built 1964 ADT: 50,600
US 20 EB
UnknownOver: S APPLETON RD
SW EDGE BELVIDERE, Boone, IL
Built 1966 ADT: 5,050
US 20 WB
UnknownOver: S APPLETON RD
SW EDGE BELVIDERE, Boone, IL
Built 1966 ADT: 5,050
UP RR
UnknownOver: US 20 BR
E EDGE OF BELVIDERE, Boone, IL
Built 1986 ADT: 11,100
POPLAR GROVE RD
UnknownOver: US 20 BR
NE OF BELVIDERE, Boone, IL
Built 1986 ADT: 8,650
US 20 WB
UnknownOver: I-90
.13 MI E WHEELER RD, Boone, IL
Built 1958 ADT: 50,600
UP RR
UnknownOver: I-90
1 MI E WINN CO, Boone, IL
Built 1958 ADT: 50,600
GENOA RD- FAS 37
UnknownOver: I 90
.6 MI S OF US 20, Boone, IL
Built 2014 ADT: 54,300
JOHNSON RD
UnknownOver: I 90
.5 MI S CHRYSLER DR, Boone, IL
Built 2014 ADT: 54,300
SHATTUCK RD
UnknownOver: I 90
2.5 MI W MCHENRY CO, Boone, IL
Built 2014 ADT: 54,300
COUNTY LINE RD
UnknownOver: I 90
MC HENRY CO LINE, Boone, IL
Built 2014 ADT: 54,300
IRENE RD
UnknownOver: I 90
.5 MI S US 20, Boone, IL
Built 2013 ADT: 49,600
STONE QUARRY RD
UnknownOver: I 90
.5 MI S US 20, Boone, IL
Built 2013 ADT: 49,600
TOWNHALL RD
UnknownOver: I 90
2 MI E OF US 20, Boone, IL
Built 2014 ADT: 49,600
PEARL ST
UnknownOver: I 90
4 MI E OF US 20, Boone, IL
Built 2014 ADT: 49,600
SPRING CENTER RD
UnknownOver: I 90
3 MI W MCHENRY CO, Boone, IL
Built 2016 ADT: 54,300
TRIPP RD
UnknownOver: I-90
.5 MI S OF US 20, Boone, IL
Built 2016 ADT: 49,600
Garden Prairie Roa
UnknownOver: I-90
1 Mi W. of Co. Line, Boone, IL
Built 2015 ADT: 54,300
Belvidere Oasis
UnknownOver: I-90
4.4 Mi E of US20, Boone, IL
Built 1960 ADT: 49,600
C & NW RAILROAD
UnknownOver: I-80
0.1 MI. E. OF IL 40, Bureau, IL
Built 1963 ADT: 19,000
I-80 EB
UnknownOver: US 34/FAU 5637
2.8 MI W JCT I-180, Bureau, IL
Built 1963 ADT: 1,500
I-80 WB
UnknownOver: US 34/FAU 5637
2.8 MI W JCT I-180, Bureau, IL
Built 1963 ADT: 1,500
I-180 NB
UnknownOver: I-80
4 MI E. OF PRINCETON, Bureau, IL
Built 1968 ADT: 22,900
I-180 SB
UnknownOver: I-80
4 MI E. OF PRINCETON, Bureau, IL
Built 1968 ADT: 22,900
I-180 SB
UnknownOver: IL 26 FAP 615
2 MI NW BUREAU JCT, Bureau, IL
Built 1968 ADT: 2,350
I-180 NB
UnknownOver: IL 26 FAS 2245
2 MI NW BUREAU JCT, Bureau, IL
Built 1967 ADT: 625
I-180 SB
UnknownOver: BOTTOM RD FAS 246
1.4 MI S JCT ILL26, Bureau, IL
Built 1968 ADT: 350
I-180 NB
UnknownOver: BOTTOM RD FAS 246
1.4 MI S JCT ILL 26, Bureau, IL
Built 1968 ADT: 350
I-180 EB/SB
UnknownOver: I-180 NB Ent Ramp
3.8 MI W IL 26, Bureau, IL
Built 1968 ADT: 2,200
I-180 EB/SB
UnknownOver: I-180NB/WB Exit Ramp
3.6 MI W IL 26, Bureau, IL
Built 1968 ADT: 400
I-180 EB
UnknownOver: IL29(SBI29A)&IAIS RR
2 MI SW BUREAU JCT., Bureau, IL
Built 1968 ADT: 350
I-180 WB
UnknownOver: IL29(SBI29A)&IAIS RR
2 MI. SW BUREAU JCT., Bureau, IL
Built 1968 ADT: 350
I-180 WB
UnknownOver: IL 26 & BUREAU CRK.
1.5 MI W HENNEPIN, Bureau, IL
Built 1968 ADT: 600
I-180 EB
UnknownOver: IL 26 & BUREAU CRK.
1.5 MI W HENNEPIN, Bureau, IL
Built 1968 ADT: 600
US 6
UnknownOver: FAI 180
3.58 MI. E OF IL 26, Bureau, IL
Built 1968 ADT: 2,600
IL 29to I-180NB Ra
UnknownOver: I-180NB Ramp to IL29
1.21 M N of IL 29, Bureau, IL
Built 1968 ADT: 400
IL 40 FAP 646
UnknownOver: I-80
3.5 MI. N OF BUDA, Bureau, IL
Built 1963 ADT: 19,000
CH 8 FAS 188
UnknownOver: I-80
2 MI N US6 @ WYANET, Bureau, IL
Built 1963 ADT: 19,000
CH 10 FAS 253
UnknownOver: I-80 & STREAM
1.25 E OF HENRY CO L, Bureau, IL
Built 1962 ADT: 17,900
Backbone Rd FAS 24
UnknownOver: I-80
1.8 MI W JCT IL 26, Bureau, IL
Built 1963 ADT: 19,000
TR 60-B / 470 E St
UnknownOver: I-80
4.78 E/HENRY CO LN, Bureau, IL
Built 1962 ADT: 17,900
TR 40
UnknownOver: I-80 & STREAM
6 MI W OF IL 40, Bureau, IL
Built 1963 ADT: 17,900
TR 148
UnknownOver: I-80
3.0 MI. E. OF IL 40, Bureau, IL
Built 1963 ADT: 19,000
TR 188
UnknownOver: I-80
4.3 MI W JCT IL 26, Bureau, IL
Built 1963 ADT: 19,000
TR 241
UnknownOver: FAI 180
0.9 MI S JCT FAI 80, Bureau, IL
Built 1968 ADT: 3,300
TR 281
UnknownOver: FAI 180
1.4 MI N ILL 26, Bureau, IL
Built 1968 ADT: 2,600
TR 322 (2600E)
UnknownOver: I-80
1.6 MI E JCT I-180, Bureau, IL
Built 1963 ADT: 22,900
Showing 51-100 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 |