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
DUFFY LANE
UnknownOver: INTERSTATE 94
I94 .8M S ILL 22, Lake, IL
Built 1958 ADT: 165,600
ATKINSON ROAD
UnknownOver: INTERSTATE 94
I94 .8M N ILL 176, Lake, IL
Built 1958 ADT: 135,200
I-94 SB
UnknownOver: OLD SKOKIE HWY
I94 1.2M N ILL 173, Lake, IL
Built 1958 ADT: 1,300
I-94 NB
UnknownOver: OLD SKOKIE HWY
I94 1.2M N ILL 173, Lake, IL
Built 1958 ADT: 1,300
I-94 SB
UnknownOver: WASHINGTON STREET
I94 1.3M S ILL 132, Lake, IL
Built 1958 ADT: 20,100
I-94 NB
UnknownOver: WASHINGTON STREET
I94 1.3M S ILL 132, Lake, IL
Built 1958 ADT: 21,300
I-94 SB
UnknownOver: ILLINOIS 176
I94 2.3M S OF ILL 13, Lake, IL
Built 1958 ADT: 16,700
I-94 NB
UnknownOver: ILLINOIS 176
I94 2.3M S OF ILL 13, Lake, IL
Built 1958 ADT: 15,800
TRI-STATE I-294
UnknownOver: DEERFIELD RD/RMP F
1/3 MI S LAKE COOK, Lake, IL
Built 2001 ADT: 2,800
O'PLAINE ROAD
UnknownOver: INTERSTATE 94
I94 .7M SE ILL 120, Lake, IL
Built 2009 ADT: 126,200
SKOKIE VALLEY BKPA
UnknownOver: DEERPATH ROAD
0.02M E OF US 41, Lake, IL
Built 1900 ADT: 15,000
C.N.W. R.R.
UnknownOver: DEERPATH ROAD
0.01 M E OF US 41, Lake, IL
Built 1936 ADT: 15,000
SOO (WICT) AMTK.RR
UnknownOver: DEERFIELD ROAD
1.2 M E OF I-94, Lake, IL
Built 1900 ADT: 16,600
RR - ABANDONED
UnknownOver: WESTLEIGH RD
1.23 M E OF US 41, Lake, IL
Built 1941 ADT: 5,750
CMSTP&P RR
UnknownOver: OLD GRAND AVE
0.7 MI W OF US 41, Lake, IL
Built 1900 ADT: 3,100
C&NW RR
UnknownOver: ILL-22
0.1M W OF US-41, Lake, IL
Built 1982 ADT: 19,300
EJ&E RR
UnknownOver: US-45
0.3 M.N.OFILL 60, Lake, IL
Built 1984 ADT: 26,500
UP RR
UnknownOver: Woodland Rd
.01M E of Western Av, Lake, IL
ADT: 4,650
Pedestrian Overpas
UnknownOver: Woodland RD
0.03 M E of Western, Lake, IL
ADT: 4,650
Lake Forest Oasis
UnknownOver: I94
.9M N of IL60, Lake, IL
Built 1958 ADT: 144,700
TWP RD TR 4
UnknownOver: FAI 80
9.12 MI W ILL 47, LaSalle, IL
Built 1960 ADT: 27,600
FAI-80 EB
UnknownOver: E 3rd Road (MS 6100A)
1.1 MI E JCT IL 251, LaSalle, IL
Built 1961 ADT: 950
FAI-80 WB
UnknownOver: E 3rd Road (MS 6100A)
1.1 MI E JCT IL 251, LaSalle, IL
Built 1961 ADT: 950
B. N. RR
UnknownOver: US 52 & ILL 251
0.51 MI S OF US 34, LaSalle, IL
Built 1936 ADT: 5,000
US 6/FAU 6088/FAP6
UnknownOver: ILL 251 FAP 46
JCT US 6 & ILL 251, LaSalle, IL
Built 1960 ADT: 9,700
BN RR
UnknownOver: ILL 23 (FAP68)
0.4 MI. N. OF US 34, LaSalle, IL
Built 1929 ADT: 1,300
ILL 251 (SB)
UnknownOver: I 80
JC ILL 251 & I-80, LaSalle, IL
Built 1961 ADT: 25,600
ILL 251 (NB)
UnknownOver: I 80
JCT IL 251 & I-80, LaSalle, IL
Built 1961 ADT: 25,600
IL 251
UnknownOver: IL RV/WATER ST/RR
0.1 MI S OF US 6, LaSalle, IL
Built 1958 ADT: 1,200
FAU6046 E18TH RD
UnknownOver: FAI 80
1.0 MI E OF ILL 23, LaSalle, IL
Built 1959 ADT: 27,400
CH 13 FAS 260
UnknownOver: I-80
3.2 ME JC 51 & I 80, LaSalle, IL
Built 1961 ADT: 28,400
CH 25/FAS 271
UnknownOver: FAI 80
4.5 MI E MARSEIL. RD, LaSalle, IL
Built 1960 ADT: 27,600
MS 6460 (E 6TH RD)
UnknownOver: FAI 80
4.4 MI E OF IL 251, LaSalle, IL
Built 1961 ADT: 30,700
TWP RD 170
UnknownOver: FAI 80
2.0 MI E OF ILL 178, LaSalle, IL
Built 1961 ADT: 29,300
TWP RD TR 244
UnknownOver: FAI 80
6.0 MI E OF ILL 178, LaSalle, IL
Built 1962 ADT: 29,300
TWP RD TR 284
UnknownOver: FAI 80
8.1 MI E OF ILL 178, LaSalle, IL
Built 1961 ADT: 29,300
TWP RD TR 366
UnknownOver: FAI 80
1.8 MI E OF ILL 71, LaSalle, IL
Built 1960 ADT: 25,100
TWP RD TR 416
UnknownOver: FAI 80
0.8 MI E MARSEILLES, LaSalle, IL
Built 1960 ADT: 27,600
TWP RD TR 434
UnknownOver: FAI 80
1.8 MI E MARSEIL RD, LaSalle, IL
Built 1960 ADT: 27,600
TWP RD TR 448
UnknownOver: FAI 80
3 MI E MARSEILLES RD, LaSalle, IL
Built 1960 ADT: 27,600
TWP RD TR 456
UnknownOver: FAI 80
3.9 MI E MARSEIL. RD, LaSalle, IL
Built 1960 ADT: 27,600
FAU 6087 SEVENTH S
UnknownOver: ILL 251
0.2 MI N OF US 6, LaSalle, IL
Built 1961 ADT: 9,700
FAS 269 (CH 12)
UnknownOver: FAI 39, US 51
3 MI N OF US 34, LaSalle, IL
Built 1977 ADT: 16,400
US 34 FAP 587
UnknownOver: I-39/US 51
INTCHG US 34 & 1-39, LaSalle, IL
Built 1977 ADT: 16,400
TR 105
UnknownOver: I-39/US 51
1 MI S OF US 34, LaSalle, IL
Built 1977 ADT: 18,700
US 52
UnknownOver: I-39/US 51
TROY GROVE, LaSalle, IL
Built 1977 ADT: 18,700
TR 205
UnknownOver: I-39/US 51
1 MI S OF US 52, LaSalle, IL
Built 1977 ADT: 18,600
FAS 1365 - CH 33
UnknownOver: I-39/US 51
3 MI N OF I-80, LaSalle, IL
Built 1977 ADT: 18,600
N 31ST RD (MS1998)
UnknownOver: I-39/US 51
1 MILE NORTH OF I-80, LaSalle, IL
Built 1977 ADT: 18,600
I-39NB/US 51NB
UnknownOver: I-80
2.55 MI W OF FAS 256, LaSalle, IL
Built 1979 ADT: 30,700
Showing 2,351-2,400 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 |