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-57 NB
UnknownOver: IL 50
I-57 & IL 50 INTRCHG, Kankakee, IL
Built 2012 ADT: 24,000
6000 N RD
UnknownOver: I-57 SB & NB
3.2 M. N. of IL 50, Kankakee, IL
Built 2017 ADT: 27,400
Indian Oak 5000N C
UnknownOver: I-57
2.2 MI N IL 50, Kankakee, IL
Built 2019 ADT: 27,400
Larry Power Rd/400
UnknownOver: I-57 NB & SB
1.2 MI N./IL 50 JCT, Kankakee, IL
Built 2020 ADT: 27,400
Waldron Rd
UnknownOver: I-57
3.4 M N US 45&54, Kankakee, IL
Built 2023 ADT: 23,300
I-57 NB
UnknownOver: Grinnell Rd 1000Rd N
0.95mi N of IL 17, Kankakee, IL
Built 2023 ADT: 2,700
IC RR
UnknownOver: BROOKMOUNT BLVD
N120-E045, Kankakee, IL
Built 1925 ADT: 9,000
PCT RR
UnknownOver: KKK RIV & BIRCHWOOD
0.08 MI E OF BRIDGE, Kankakee, IL
Built 1900 ADT: 300
ICG RR
UnknownOver: FAU 6179 BROADWAY ST
1 BLOCK W SCHULYER, Kankakee, IL
Built 1925 ADT: 4,900
ICG RR
UnknownOver: FAU 6179 BROADWAY ST
1 BLOCK W SCHULYER, Kankakee, IL
Built 1925 ADT: 4,900
ICG RR
UnknownOver: HAWKINS STMS # 2500
KANKAKEE SOUTH SIDE, Kankakee, IL
Built 1900 ADT: 350
Pedestrian Bridge
UnknownOver: IL 113
0.2 M. N. of IL 17, Kankakee, IL
Built 2002 ADT: 11,000
CON-RAIL CORP.
UnknownOver: ILL 113
0.1 MI N OF ILL 17, Kankakee, IL
Built 2004 ADT: 11,000
BNSF-Mendota RR
UnknownOver: ILL RTE 47
1.78 Mi N of US 34, Kendall, IL
Built 1935 ADT: 15,400
BN RR
UnknownOver: FAS276/FOX RVR RD
4.33 MI S OF US 34, Kendall, IL
Built 1954 ADT: 2,600
B.N. RR
UnknownOver: IL 25 & RIVER
.49 MI S OF US 30, Kendall, IL
Built 1938 ADT: 7,900
B.N. RR
UnknownOver: ILL RTE 25
1.82 MI S OF US 30, Kendall, IL
Built 1935 ADT: 7,900
EB I-74
UnknownOver: IL 17 & BNSF-EXEMPT
0.5 MI W OF WOODHULL, Knox, IL
Built 1967 ADT: 3,550
WB I-74
UnknownOver: IL 17 & BNSF-EXEMPT
0.5 MI W OF WOODHULL, Knox, IL
Built 1967 ADT: 3,200
TR 399-100N
UnknownOver: I-74
1 MI SW OF WOODHULL, Knox, IL
Built 1965 ADT: 15,000
EB I-74
UnknownOver: MAIN (FAU 6800)
GALESBURG INERCH, Knox, IL
Built 1963 ADT: 4,900
WB I-74
UnknownOver: E. MAIN ST
GALESBURG INTERCH, Knox, IL
Built 1963 ADT: 4,900
WB I-74
UnknownOver: TR 205
1 MI W JCT US 150, Knox, IL
Built 1963 ADT: 200
EB I-74
UnknownOver: TR 205
1 MI W OF US 150, Knox, IL
Built 1963 ADT: 200
WB US 34
UnknownOver: I-74
NE OF GALESBURG, Knox, IL
Built 1965 ADT: 16,300
EB US 34
UnknownOver: I-74
NE OF GALESBURG, Knox, IL
Built 1965 ADT: 16,300
US 34 WB
UnknownOver: US 150
N CL OF GALESBURG, Knox, IL
Built 1965 ADT: 9,500
US 34 EB
UnknownOver: US 150
N CL OF GALESBURG, Knox, IL
Built 1965 ADT: 6,300
US 150
UnknownOver: INTERSTATE 74
1 MI E OF KNOXVILLE, Knox, IL
Built 1963 ADT: 15,400
APPLETON ROAD
UnknownOver: I-74
6 MI E OF KNOXVILLE, Knox, IL
Built 1967 ADT: 15,400
FAS 396-CH 18
UnknownOver: I-74
3 MI E OF SPOON R, Knox, IL
Built 1968 ADT: 15,400
ONTARIO ROAD
UnknownOver: I-74
.5 MI N HENDERSON CR, Knox, IL
Built 1966 ADT: 16,300
RIO ROAD
UnknownOver: I-74
5 MI S WOODHULL, Knox, IL
Built 1966 ADT: 16,300
CH 21
UnknownOver: I-74
3 MI E OF KNOXVILLE, Knox, IL
Built 1967 ADT: 15,400
BRICKYARD RD (650
UnknownOver: I-74
1 MI NW KNOXVILLE, Knox, IL
Built 1963 ADT: 19,000
MARKET ST (825 E)
UnknownOver: I-74
IN KNOXVILLE, Knox, IL
Built 1962 ADT: 16,800
TR 235
UnknownOver: I-74
8 MI E OF KNOXVILLE, Knox, IL
Built 1968 ADT: 15,400
WB I-74
UnknownOver: SPOON R & TR 238A
9 MI E OF KNOXVILLE, Knox, IL
Built 1968 ADT: 25
EB I-74
UnknownOver: SPOON RIVER & TR238A
9 MI E OF KNOXVILLE, Knox, IL
Built 1968 ADT: 25
TR 253
UnknownOver: I-74
6 MI E SPOON RIVER, Knox, IL
Built 1967 ADT: 15,400
KNOX ST
UnknownOver: I-74
S OF GALESBURG INTER, Knox, IL
Built 1964 ADT: 19,000
CH 7
UnknownOver: I-74
1 MI N GALESBURG INT, Knox, IL
Built 1963 ADT: 17,700
TR 121 (2000N)
UnknownOver: I-74
1.5 MI N US-34 INTER, Knox, IL
Built 1965 ADT: 16,300
HENDERSON RD (CH 3
UnknownOver: I-74
2.5 MI W OF WATAGA, Knox, IL
Built 1965 ADT: 16,300
TR 89
UnknownOver: I-74
2.5 MI S HENDERSON C, Knox, IL
Built 1965 ADT: 16,300
TR 21
UnknownOver: I-74
4 MI SW OF WOODHULL, Knox, IL
Built 1965 ADT: 16,300
TR 74 FARNHAM ST
UnknownOver: US 34 BYPASS
W OF I-74&34 INTERCH, Knox, IL
Built 1965 ADT: 14,500
BNSF(065601P)
UnknownOver: US 34 BYPASS
1.5 MI E OF US 150, Knox, IL
Built 1965 ADT: 14,500
SEMINARY ST
UnknownOver: US 34 BYPASS
1 MI E OF US 150, Knox, IL
Built 1972 ADT: 12,900
LINCOLN PARK DR
UnknownOver: US 34 BYPASS
0.6 MI E OF US 150, Knox, IL
Built 1965 ADT: 12,900
Showing 2,201-2,250 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 |