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
US 14
UnknownOver: IL 31
US 14 & ILL 31 INCHG, McHenry, IL
Built 1999 ADT: 27,300
IL 31
UnknownOver: ALGONQUIN RD
2.1 M E Randall Rd, McHenry, IL
Built 2013 ADT: 33,600
IL 23
UnknownOver: I- 90 Jane Adams
I-90 @ IL23, McHenry, IL
Built 2017 ADT: 57,000
SOUTH STREET
UnknownOver: US 14
2.8 M W OF IL 47, McHenry, IL
Built 1958 ADT: 13,700
ANTHONY RD
UnknownOver: I 90
I 90 2.8 MI W ILL 23, McHenry, IL
Built 2015 ADT: 57,000
CHI.& NW. R.R.
UnknownOver: HILLSIDE ROAD
STATE LN 1 M E IL 47, McHenry, IL
Built 1901 ADT: 150
CHICAGO N.W. R.R.
UnknownOver: PLEASANT HILL
1 M W OF ILL 31, McHenry, IL
Built 1906 ADT: 1,800
PRAIRIE TRAIL
UnknownOver: HUNTLEY/ALGONQUIN RD
.4MI E PYOTT, McHenry, IL
Built 1990 ADT: 31,600
Getty Road
UnknownOver: Interstate 90
0.5 M N of Dekalb CO, McHenry, IL
Built 2013 ADT: 57,000
Harmony Riley Road
UnknownOver: Interstate 90
I-90 1M W of ILL 23, McHenry, IL
Built 2014 ADT: 57,000
I-55/I-74 NB
UnknownOver: SIX PTS RD/FAU 6369
1.9 MI S JCT ILL 9, McLean, IL
Built 1963 ADT: 2,300
I-55/I-74 SB
UnknownOver: SIX PTS.RD/FAU 6369
1.9 MI S JCT ILL 9, McLean, IL
Built 1963 ADT: 2,300
I-55/I-74 NB
UnknownOver: WASH.ST/FAU 6360
0.4 MI S ILL RT 9, McLean, IL
Built 1962 ADT: 5,350
I-55/I-74 SB
UnknownOver: WASH.ST/FAU 6360
0.4 MI S OF ILL RT 9, McLean, IL
Built 1962 ADT: 5,350
I-55/I-74 NB
UnknownOver: NS Railway & White Oak R
3.8 MI SW OF RT 51, McLean, IL
Built 1963 ADT: 4,250
I-55/I-74 SB
UnknownOver: NS Railway & White Oak R
3.8 M SW OF RT 51, McLean, IL
Built 1963 ADT: 4,250
I-55 NW BLOOMINGTO
UnknownOver: I-74
I-55NB OVER I-74, McLean, IL
Built 1962 ADT: 26,700
I-55 NW BLOOMINGTO
UnknownOver: I-74
I-55SB OVER I-74, McLean, IL
Built 1962 ADT: 26,700
I-55 NB
UnknownOver: US 51B (Main St)
INTER I 55 & US 51B, McLean, IL
Built 1962 ADT: 13,300
I-55 SB & CD#2279
UnknownOver: US 51B (Main St)
INTER I-55 & US 51B, McLean, IL
Built 1962 ADT: 13,300
I-74 EB
UnknownOver: US 51/S.OF BLOOMNGTN
US 51 INTERCHANGE, McLean, IL
Built 1963 ADT: 14,600
I-74 WB
UnknownOver: US 51/S.OF BLOOMNGTN
US 51 INTERCHANGE, McLean, IL
Built 1963 ADT: 12,700
I-55 BUSN LOOP
UnknownOver: US 51 AT BLOOMINGTON
JCT BUSN 55 & US 51, McLean, IL
Built 1939 ADT: 14,900
I-55 BUSN LOOP
UnknownOver: BUNN STREET
0.58 MI E OF US 51, McLean, IL
Built 1940 ADT: 2,800
I-55 BUSN LOOP
UnknownOver: Union Pacific RR & Old 6
2.8 MI N OF ILL 9, McLean, IL
Built 1939 ADT: 3,100
US 150
UnknownOver: FAI 74
OVER I-74 NW NORMAL, McLean, IL
Built 1964 ADT: 26,700
ILL 9
UnknownOver: I-55/I-74
INTERCHANGE ILL 9, McLean, IL
Built 1964 ADT: 42,100
CARLOCK ROAD
UnknownOver: I-74
7.70 MI E OF ILL 117, McLean, IL
Built 1964 ADT: 29,600
FAS 1473
UnknownOver: I-74
1 MILE W OF I-55, McLean, IL
Built 1963 ADT: 26,700
WEST OAKLAND CH RD
UnknownOver: I-55/I-74
1.3 M S I-55 & IL 9, McLean, IL
Built 1963 ADT: 43,100
TR 90
UnknownOver: I-74
8.3 MI E OF ILL 117, McLean, IL
Built 1964 ADT: 29,600
COUNTY ROAD TR 76
UnknownOver: I-74
6.65 MI E OF ILL 117, McLean, IL
Built 1964 ADT: 28,400
TR 104
UnknownOver: I-74
6 MILES W OF I-55, McLean, IL
Built 1964 ADT: 29,600
TR 201
UnknownOver: I-74
4 MILES W OF I-55, McLean, IL
Built 1964 ADT: 29,600
TR 210
UnknownOver: I-74/S.OF BLOOMNGTN
1 MILE E OF BUSN 55, McLean, IL
Built 1964 ADT: 21,800
TOWANDA AVE(FAU641
UnknownOver: I-55/N OF NORMAL
1.75 MI E OF US 51, McLean, IL
Built 1962 ADT: 31,700
FAU 6374 CH 30
UnknownOver: I-74/SE OF BLOOMNGTN
2.1 MI E OF US 51, McLean, IL
Built 1968 ADT: 19,000
TR 296
UnknownOver: I-74/SE OF BLOOMNGTN
3.53 MI E OF US 51, McLean, IL
Built 1968 ADT: 19,000
FAU 6431 CH 29
UnknownOver: I-74/SE OF BLOOMNGTN
5.39 MI E OF US 51, McLean, IL
Built 1968 ADT: 19,000
FAU 6437 CH 36
UnknownOver: I-74 NEAR DOWNS
6.91 MI E OF US 51, McLean, IL
Built 1968 ADT: 21,600
TR 366A
UnknownOver: I-74
8.87 MI E OF US 51, McLean, IL
Built 1968 ADT: 21,600
TR 390
UnknownOver: I-74/2 MI W OF LEROY
2 MI NW OF LEROY, McLean, IL
Built 1970 ADT: 21,600
FAS 1478
UnknownOver: I-74 AT LEROY
13.63 MI E OF US 51, McLean, IL
Built 1970 ADT: 21,500
US 136
UnknownOver: I-74
2.75 MI SE OF LEROY, McLean, IL
Built 1970 ADT: 21,200
I-55 SB
UnknownOver: US 24/FAP 317
0.44 MI W OF OLD 66, McLean, IL
Built 1977 ADT: 5,350
I-55 NB
UnknownOver: US 24/FAP 317
0.41 MI W OF OLD 66, McLean, IL
Built 1977 ADT: 5,350
I-55 SB
UnknownOver: US 136/FAP 315
MCLEAN, McLean, IL
Built 1975 ADT: 4,300
I-55 NB
UnknownOver: US 136/FAP 315
MCLEAN, McLean, IL
Built 1975 ADT: 2,350
TR 539
UnknownOver: I-55
1 MI S OF FUNKSGROVE, McLean, IL
Built 1975 ADT: 22,100
I-55 SB
UnknownOver: RAMPS & CH36
FUNKS GROVE SEC 16, McLean, IL
Built 1975 ADT: 75
Showing 2,851-2,900 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 |