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
TR 82 SWEATMAN RD
FairOver: LOST CREEK
3.7 MI NW VIRGINIA, Cass, IL
Built 1987 Load: 45.0 t ADT: 25
I-74(WB)
FairOver: W FORK SALINE BRANCH
N OF URBANA, Champaign, IL
Built 1956 Load: 45.0 t ADT: 20,950
I-74(EB)
FairOver: W FORK SALINE BRANCH
N OF URBANA, Champaign, IL
Built 1956 Load: 45.0 t ADT: 20,950
MT AUBURN RD
FairOver: BUCKHART CREEK
4.2M S CH2,MT AUBURN, Christian, IL
Built 1987 Load: 45.0 t ADT: 600
FAP-828 (CC-MONT B
FairOver: LITTLE WABASH RIVER
1.5 MI N CLAY CITY, Clay, IL
Built 1954 Load: 45.0 t ADT: 1,850
GLENVIEW RD
FairOver: M F N BR CHI RIV
1.3 M E ILL43 P14, Cook, IL
Built 1932 Load: 45.0 t ADT: 7,150
US 12,20 EB RMP IL
FairOver: RR - CSXT & RICHARD
0.1 M NW IL 43, Cook, IL
Built 1961 Load: 45.0 t ADT: 4,000
55TH ST
FairOver: FLAG CREEK
2 M W US 45, Cook, IL
Built 1958 Load: 45.0 t ADT: 16,600
111TH ST
FairOver: STONEY CREEK
1.0 M W OF IL 7, Cook, IL
Built 1989 Load: 45.0 t ADT: 12,300
IL 62 (OAKTON ST)
FairOver: DES PLAINES RIVER
0.4 M W I-294, Cook, IL
Built 1995 Load: 45.0 t ADT: 13,400
I-294
FairOver: CRYSTAL CREEK
0.1 M S IL-19, Cook, IL
Built 1959 Load: 45.0 t ADT: 173,100
US 30 (LINCOLN HWY
FairOver: LANSING DRNAGE DITCH
0.2 M SE US 30/IL83, Cook, IL
Built 2003 Load: 45.0 t ADT: 26,600
I-294 NB
FairOver: W.C.RR
1 M N ILL 19 P9, Cook, IL
Built 1958 Load: 45.0 t ADT: 96,850
US 51 (NB)(FAP 322
FairOver: SALT CREEK
2 MI S OF CLINTON, De Witt, IL
Built 1986 Load: 45.0 t ADT: 9,450
I 70 EB
FairOver: KASKASKIA RIV
.5 MI E VANDAL INT, Fayette, IL
Built 2016 Load: 45.0 t ADT: 11,350
US 136
FairOver: GRAHAM BRANCH
2 MI E JCT US136&24, Fulton, IL
Built 2000 Load: 45.0 t ADT: 1,700
IL 82
FairOver: S. BR EDWARDS RIVER
2.4 MI N OF IL 17, Henry, IL
Built 1989 Load: 45.0 t ADT: 350
FAP 322-US 51
FairOver: BIG MUDDY RIVER
1.8 MI S DESOTO, Jackson, IL
Built 2001 Load: 45.0 t ADT: 6,250
FAP 650 - IL 78
FairOver: S FORK APPLE RIVER
4.2 MI. N. US 20, Jo Daviess, IL
Built 1991 Load: 45.0 t ADT: 1,550
ASHLAND AVENUE
FairOver: W BRANCH OF FOX RV
400 FT W ILL RTE 25, Kane, IL
Built 1961 Load: 45.0 t ADT: 6,600
ILL 113
FairOver: WILEY CREEK
4.7 MI N OF IL 17, Kankakee, IL
Built 2006 Load: 45.0 t ADT: 3,550
IL 251
FairOver: BUREAU CREEK
.9 MI N LASALLE CO, Lee, IL
Built 1994 Load: 45.0 t ADT: 1,400
TR 91
FairOver: DEER CREEK
1695 E, 2300N, Livingston, IL
Built 1922 Load: 45.0 t ADT: 25
I-55 NB
FairOver: KICKAPOO CREEK
3.6 N BUS55 LAWNDALE, Logan, IL
Built 1974 Load: 45.0 t ADT: 11,600
I-55 SB
FairOver: KICKAPOO CREEK
3.6 N BUS55 LAWNDALE, Logan, IL
Built 1974 Load: 45.0 t ADT: 11,600
ILL 4
FairOver: CAHOKIA CREEK
1.0 M N STAUNTON, Macoupin, IL
Built 1921 Load: 45.0 t ADT: 2,800
US 67
FairOver: SHORT FORK TRIBUTARY
0.5 MI N GOOD HOPE, McDonough, IL
Built 1994 Load: 45.0 t ADT: 4,850
IL 31
FairOver: EDGEWOOD RAVINE
0.5 M S OF IL 62, McHenry, IL
Built 1925 Load: 45.0 t ADT: 21,200
US 136
FairOver: DITCH
4.3 M E US 136 & 150, McLean, IL
Built 1933 Load: 45.0 t ADT: 1,000
TR129
FairOver: DONOHUE RUN
CTR-3-T14NR2W, Mercer, IL
Built 1974 Load: 45.0 t ADT: 100
ILL 64
FairOver: ROCK RIVER
E. OF IL 2 IN OREGON, Ogle, IL
Built 1998 Load: 45.0 t ADT: 9,350
US 24 & IL 9
FairOver: PEYTON CREEK
2 MI W GLASFORD JCT, Peoria, IL
Built 2000 Load: 45.0 t ADT: 7,900
IL 26/FAS 2370
FairOver: TRIB TO ILL RIVER
3.76 MI S OF IL 71, Putnam, IL
Built 2001 Load: 45.0 t ADT: 800
FAP 325 (IL 16)
FairOver: SWAFFORD BRANCH
.75 MI W SHELBYVILLE, Shelby, IL
Built 1991 Load: 45.0 t ADT: 8,200
US 20 BR
FairOver: SMALL CREEK
1.5 MI E FREEPORT, Stephenson, IL
Built 1956 Load: 45.0 t ADT: 7,000
E. CEDARVILLE RD.
FairOver: BROWN CREEK
2.0 MI SE DAKOTA, Stephenson, IL
Built 1940 Load: 45.0 t ADT: 950
IL 1 (FAP 332)
FairOver: N FORK VERMILION RIV
2.8 MI S ROSSVILLE, Vermilion, IL
Built 1939 Load: 45.0 t ADT: 4,550
TR 427
FairOver: FAYETTE CREEK
2.5 MI NE INDIANOLA, Vermilion, IL
Built 2010 Load: 45.0 t ADT: 75
IL 40
FairOver: ELKHORN CREEK
2 MI N STERLING, Whiteside, IL
Built 2012 Load: 45.0 t ADT: 3,400
SPRING VALLEY ROAD
FairOver: BRANCH OTTER CREEK
6 MI NE OF FULTON, Whiteside, IL
Built 1963 Load: 45.0 t ADT: 175
FAU 5063 - STATE S
FairOver: ROCK RIVER
DOWNTOWN ROCKFORD, Winnebago, IL
Built 1948 Load: 45.0 t ADT: 6,000
IL 251 SB
FairOver: KILBUCK CREEK
.6 MI N. OGLE CO.LN., Winnebago, IL
Built 1989 Load: 45.0 t ADT: 4,450
IL 2
FairOver: DRAINAGE DITCH
0.6 MI NE OGLE CO LN, Winnebago, IL
Built 1994 Load: 45.0 t ADT: 6,200
ILL 3 - FAP 14
FairOver: LAKE CR
0.5 MI S OF ILL 127, Alexander, IL
Built 1986 Load: 45.4 t ADT: 1,950
ILL 143
FairOver: ROCKY FORD CREEK
IN PIERRON, Bond, IL
Built 1921 Load: 45.4 t ADT: 2,200
TOWNSHIP ROAD 74
FairOver: MASTERS CREEK
6.0 MI WEST LAMOILLE, Bureau, IL
Built 1961 Load: 45.4 t ADT: 125
I-57(SB)
FairOver: COPPER SLOUGH
SW OF CHAMPAIGN, Champaign, IL
Built 1963 Load: 45.4 t ADT: 12,900
I-57(NB)
FairOver: COPPER SLOUGH
SW OF CHAMPAIGN, Champaign, IL
Built 1963 Load: 45.4 t ADT: 12,900
IL 49(FAP 832)
FairOver: POLECAT CREEK
1 MI S OF IL 16, Coles, IL
Built 1987 Load: 45.4 t ADT: 1,050
FAP 824(US 45)
FairOver: STREAM
1.5 MI N OF HUMBOLDT, Coles, IL
Built 1997 Load: 45.4 t ADT: 2,900
Showing 12,851-12,900 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.