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
FAS1045-BAXTER RD
UnknownOver: I-39 & US 51
1.0 MI N OF OGLE CO, Winnebago, IL
Built 1980 ADT: 29,000
ALPINE ROAD
UnknownOver: US 20 BY-PASS
SOUTH EDGE ROCKFORD, Winnebago, IL
Built 1984 ADT: 30,400
PRAIRIE HILL RD
UnknownOver: I-90
2 MI S WISCONSIN LN, Winnebago, IL
Built 2000 ADT: 51,000
US 51 & IL 75
UnknownOver: I-90
E. EDGE SOUTH BELOIT, Winnebago, IL
Built 2000 ADT: 51,000
US 20 E B
UnknownOver: ILL 2
1 MI S OF ROCKFORD, Winnebago, IL
Built 2019 ADT: 15,500
US 20 W B
UnknownOver: ILL 2
1 MI S OF ROCKFORD, Winnebago, IL
Built 2019 ADT: 15,500
20TH ST
UnknownOver: US 20
0.7 MI E OF ILL 251, Winnebago, IL
Built 2021 ADT: 36,000
ILL 251
UnknownOver: SPRING CREEK RD
1.4 MI N WHITMAN ST, Winnebago, IL
Built 2012 ADT: 27,600
PERRYVILLE ROAD
UnknownOver: I-39
.75 S HARRISON AVE, Winnebago, IL
Built 2023 ADT: 50,900
LINDEN RD
UnknownOver: I 39 SB RAMP
OVER 39 SB RAMP, Winnebago, IL
Built 2023 ADT: 5,950
ALPINE RD
UnknownOver: FOREST HILLS RD
0.2 MI S WINDSOR RD, Winnebago, IL
Built 1972 ADT: 11,200
JEFFERSON ST
UnknownOver: ROCK RIV& MADISON ST
0.1 MI E OF N MAIN, Winnebago, IL
Built 1925 ADT: 2,700
WHITMAN ST
UnknownOver: MADISON ST & RR
0.25 MI E OF MAIN ST, Winnebago, IL
Built 1961 ADT: 3,100
N 2ND ST
UnknownOver: WHITMAN ST
WHITMAN INTERCHANGE, Winnebago, IL
Built 1963 ADT: 7,900
N 3RD ST EXT TO 2N
UnknownOver: SB RAMP TO N 6TH ST
WHITMAN INTERCHANGE, Winnebago, IL
Built 1963 ADT: 6,000
I-90 S B
UnknownOver: BURR OAK RD
1 MI E OF ROSCOE, Winnebago, IL
Built 1958 ADT: 1,850
I-90 N B
UnknownOver: BURR OAK RD
1 MI E OF ROSCOE, Winnebago, IL
Built 1958 ADT: 1,850
I-90 RAMP
UnknownOver: I-90
.25 MI N OF 20 BR, Winnebago, IL
Built 1958 ADT: 70,600
ELEVATOR RD
UnknownOver: I-90
1 MI E OF ROSCOE, Winnebago, IL
Built 1958 ADT: 57,100
SPRING CREEK RD
UnknownOver: I-90
2 MI N RT 20 BR, Winnebago, IL
Built 1958 ADT: 66,300
BELVIDERE RD
UnknownOver: I-90
2.5 MI N ILL 173, Winnebago, IL
Built 1958 ADT: 57,100
HARLEM RD
UnknownOver: I-90
2 MI S OF ILL 173, Winnebago, IL
Built 1958 ADT: 61,400
ROCKTON RD
UnknownOver: I-90
2.5 MI S OF ILL 75, Winnebago, IL
Built 1958 ADT: 57,100
SWANSON RD
UnknownOver: I-90
1.5 MI N ILL 173, Winnebago, IL
Built 1958 ADT: 57,100
ROTE RD
UnknownOver: I-90
2 MI E ROCKFORD, Winnebago, IL
Built 1958 ADT: 66,300
UNION PACIFIC RR
UnknownOver: ILL 2
S EDGE RKFD CBD, Winnebago, IL
Built 1900 ADT: 8,650
DM&E RR
UnknownOver: GLEASMAN RD
1.5 MI SW ROSCOE, Winnebago, IL
Built 1900 ADT: 1,400
ICE RR
UnknownOver: PRAIRIE HILL RD
0.4 MI SE S. BLUFF, Winnebago, IL
Built 1966 ADT: 4,200
CMST P&P RR
UnknownOver: GOEKE RD
.5 MI N OF ILL 75, Winnebago, IL
Built 1900 ADT: 35
ICE RR
UnknownOver: ATWOOD FOR PRES RD
1.5 MI E OF ILL 2, Winnebago, IL
Built 1900 ADT: 100
UNION PACIFIC RR
UnknownOver: TAY ST & KENT CREEK
SW ROCKFORD, Winnebago, IL
Built 1900 ADT: 750
UP RR
UnknownOver: 9TH STREET
SE ROCKFORD, Winnebago, IL
Built 1890 ADT: 2,100
UNION PACIFIC RR
UnknownOver: BROADWAY
SE ROCKFORD, Winnebago, IL
Built 1900 ADT: 8,700
UP RR
UnknownOver: 20TH STREET
SE ROCKFORD, Winnebago, IL
Built 1900 ADT: 6,950
RIVERSIDE RD
UnknownOver: I-90
2 MI E LOVES PARK, Winnebago, IL
Built 2009 ADT: 66,300
Pedestrian Walkway
UnknownOver: I-90
07320219621 004, Winnebago, IL
ROCK CUT ST. PK. R
UnknownOver: I-90 (NW TOLLWAY)
1.5 MI. S. OF IL 173, Winnebago, IL
Built 1989 ADT: 61,400
I-90 NB
UnknownOver: ILL RTE 173
3 MI S OF ROSCOE, Winnebago, IL
Built 2007 ADT: 10,300
I-90 SB
UnknownOver: ILL RTE 173
3 MI S OF ROSCOE, Winnebago, IL
Built 2007 ADT: 10,300
MCCURRY RD
UnknownOver: I-90 (N & W)
1 MI E OF ROSCOE, Winnebago, IL
Built 2006 ADT: 57,100
NEWBURG RD
UnknownOver: I-90
.10 W OF I-39, Winnebago, IL
Built 2008 ADT: 70,600
RAMP I-39NB TO I90
UnknownOver: I-90
.42MI E NEWBURG RD, Winnebago, IL
Built 2009 ADT: 4,850
I-90 N B
UnknownOver: US 20 BR
2 MI E ROCKFORD, Winnebago, IL
Built 2009 ADT: 26,100
I-90 S B
UnknownOver: US 20 BR
1.2M W OF NEWBURG RD, Winnebago, IL
Built 2009 ADT: 26,100
I 90 WB TO I 39 SB
UnknownOver: I-90
.5 MI N US 20, Winnebago, IL
Built 2009 ADT: 50,600
MILL RD
UnknownOver: I 90
.5 MI N OF CHERRY VA, Winnebago, IL
Built 2013 ADT: 50,600
EB I-74
UnknownOver: CONGERVILLE ROAD
3.85 MI E OF ILL 117, Woodford, IL
Built 1964 ADT: 350
WB I-74
UnknownOver: CONGERVILLE ROAD
3.85 MI E OF ILL 117, Woodford, IL
Built 1964 ADT: 350
US 150
UnknownOver: I-74
2.95 MI W OF ILL 117, Woodford, IL
Built 1964 ADT: 26,200
ILL 117
UnknownOver: I-74
JCT I-74 & ILL 117, Woodford, IL
Built 1964 ADT: 28,400
Showing 3,951-4,000 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 |