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
FAS 456
FairOver: LAKE FORK CREEK
7 MI W MAROA, Macon, IL
Built 2013 Load: 32.4 t ADT: 300
CH 36(Baker Rd)
FairOver: Dry Creek
1.8 Mi. SW of Macon, Macon, IL
Built 2016 Load: 32.4 t ADT: 100
FAS 546(CH 21)
FairOver: ILLINI DRAIN DITCH
1 MI E HEMAN, Macon, IL
Built 1980 Load: 32.4 t ADT: 425
TR 65A
FairOver: STREAM
2 MI N OF OAKLEY, Macon, IL
Built 1992 Load: 32.4 t ADT: 125
TR 1A(LAKE FORK RD
FairOver: STREAM
5.3 MI NW OF ARGENTA, Macon, IL
Built 1991 Load: 32.4 t ADT: 75
TR 263
FairOver: FINLEY CREEK
5 MI E OF MACON, Macon, IL
Built 1993 Load: 32.4 t ADT: 50
FAU 7355 CH 24
FairOver: Lake Decatur Trib
4.3 Miles North East, Macon, IL
Built 1986 Load: 32.4 t ADT: 2,200
SEIBERLINGST(MS170
FairOver: MOSQUITO CREEK
E EDGE OF BLUE MOUND, Macon, IL
Built 1982 Load: 32.4 t ADT: 575
FAU 7437(ML KING D
FairOver: SPRING CREEK
N NE OF DECATUR, Macon, IL
Built 1994 Load: 32.4 t ADT: 7,100
BALTIMORE FAU7449
FairOver: BIG CREEK
1 MI N MT ZION, Macon, IL
Built 2012 Load: 32.4 t ADT: 6,750
TR 939-PARK DR
FairOver: STEVENS CREEK
FAIRVIEW PARK, Macon, IL
Built 2012 Load: 32.4 t ADT: 400
TR-5
FairOver: W FRK OTTER CR
5 M NE MODESTO, Macoupin, IL
Built 2006 Load: 32.4 t ADT: 20
TR 113
FairOver: Otter Creek
0.22 mi E CH 24A, Macoupin, IL
Built 2015 Load: 32.4 t ADT: 50
TR 447
FairOver: HONEYCUT CREEK
2.5 MI E OF BRIGHTON, Macoupin, IL
Built 1982 Load: 32.4 t ADT: 375
TR 263
FairOver: SHAW POINTBRANCH
8E 2S CARLINVILLE, Macoupin, IL
Built 1983 Load: 32.4 t ADT: 20
CH 18
FairOver: NASSA CREEK
0.5 MI SE HETTICK, Macoupin, IL
Built 1983 Load: 32.4 t ADT: 275
TR 151
FairOver: CREEK
3 MI NE STANDARD CTY, Macoupin, IL
Built 1987 Load: 32.4 t ADT: 50
TR 305
FairOver: MACOUPIN BRANCH
4.0 MI NE MEDORA, Macoupin, IL
Built 1985 Load: 32.4 t ADT: 20
TR328
FairOver: HONEY CREEK
2 MI S CARLINVILLE, Macoupin, IL
Built 1994 Load: 32.4 t ADT: 225
CH 23
FairOver: MACOUPIN CREEK
2MI SW CHESTERFIELD, Macoupin, IL
Built 1990 Load: 32.4 t ADT: 50
TR 195
FairOver: MACOUPIN CR
1.5 MI SE STANDRD CT, Macoupin, IL
Built 2003 Load: 32.4 t ADT: 125
TR 132A
FairOver: LICK CREEK
3.5 MI S HETTICK, Macoupin, IL
Built 2000 Load: 32.4 t ADT: 35
TR 186
FairOver: OTTER CREEK
4S .5 E PALMYRA, Macoupin, IL
Built 1989 Load: 32.4 t ADT: 20
TR 201
FairOver: BEAR CREEK
3.3MI NW CARLINVILLE, Macoupin, IL
Built 1990 Load: 32.4 t ADT: 20
TR 233
FairOver: SHAWSPOINT CREEK
3S 1E STANDARD CITY, Macoupin, IL
Built 1988 Load: 32.4 t ADT: 50
TR 471
FairOver: PADDOCK CREEK
1 M S BUNKER HILL, Macoupin, IL
Built 1988 Load: 32.4 t ADT: 175
TR 477C
FairOver: CAHOKIA CRK.
1 MI W STAUTON, Macoupin, IL
Built 2002 Load: 32.4 t ADT: 250
TR 480
FairOver: SHEARLESS BRANCH
1.7 MI S GIRARD, Macoupin, IL
Built 2000 Load: 32.4 t ADT: 100
TR 483A
FairOver: BRANCH SILVER CREEK
2.5 M E STAUNTON, Macoupin, IL
Built 1988 Load: 32.4 t ADT: 250
TR-494
FairOver: MACOUPIN CR
2.5 E STAND. CITY, Macoupin, IL
Built 1997 Load: 32.4 t ADT: 75
EMERSON AIRLINE RD
FairOver: E. FK. OTTER CREEK
3.5 MI W..GIRARD, Macoupin, IL
Built 1939 Load: 32.4 t ADT: 1,150
TR 109
FairOver: Taylor Creek
5.0 MI S SCOTTVILLE, Macoupin, IL
Built 1971 Load: 32.4 t ADT: 20
I-55/70 EB
FairOver: A&SRR
0.75 mi E of IL 111, Madison, IL
Built 1980 Load: 32.4 t ADT: 26,800
ILL 160
FairOver: BUCKEYE BRANCH
3.1MI S OF HIGHLAND, Madison, IL
Built 2004 Load: 32.4 t ADT: 5,350
IL 160
FairOver: Tr to E Fk Silver Cr
350' N of Pokey Road, Madison, IL
Built 1936 Load: 32.4 t ADT: 1,850
WAFFLER RD/ TR 399
FairOver: SPANKER BR
4.5 MI SE HIGHLAND, Madison, IL
Built 1978 Load: 32.4 t ADT: 125
CH 49 WIESEMAN RD
FairOver: CAHOKIA CREEK
2.5 NW OF WORDEN, Madison, IL
Built 1988 Load: 32.4 t ADT: 275
TR 36/WOODSTATION
FairOver: W FORK WOOD RIVER CR
1.0 MI NE ALTON, Madison, IL
Built 1980 Load: 32.4 t ADT: 375
SEILER RD TR 45
FairOver: PADDOCK CK
2.0 MI E DORSEY, Madison, IL
Built 1979 Load: 32.4 t ADT: 150
IBERG RD/ TR 355
FairOver: SUGAR CREEK
1.3 MI SE HIGHLAND, Madison, IL
Built 1982 Load: 32.4 t ADT: 475
CH 23 QUERCUS GROV
FairOver: CAHOKIA CREEK
1.5M N OF CARPENTER, Madison, IL
Built 1984 Load: 32.4 t ADT: 100
KECK ROAD/ TR 319
FairOver: E FK SILVER CK
1.75 MI NW ST JAC, Madison, IL
Built 1980 Load: 32.4 t ADT: 125
TR 17
FairOver: SILVER CK
0.25 MI EAST BINNEY, Madison, IL
Built 1981 Load: 32.4 t ADT: 100
VFW RD/ TR 3
FairOver: CAHOKIA CREEK
1.9 M W OFSTAUNTON, Madison, IL
Built 1984 Load: 32.4 t ADT: 150
FAS 766/POCAHONTAS
FairOver: LITTLE SILVER CK
0.5 MI E GRANTFORK, Madison, IL
Built 1983 Load: 32.4 t ADT: 425
YORKVILLE RD/ TR 9
FairOver: PADDOCK CK
1 MI NE MIDWAY, Madison, IL
Built 1982 Load: 32.4 t ADT: 200
FAS 771/ ST JAMES
FairOver: PADDOCK CK
2.0 MI SE MIDWAY, Madison, IL
Built 1982 Load: 32.4 t ADT: 2,500
CH 14 SHERRY CREEK
FairOver: TRIB TO SHERRY CREEK
3.0 M WESTOF WORDEN, Madison, IL
Built 1984 Load: 32.4 t ADT: 100
CH 19 POAG RD
FairOver: COUNTY DITCH
1.3 MI SW POAG, Madison, IL
Built 1982 Load: 32.4 t ADT: 300
FAS 771/ MORO RD.
FairOver: PADDOCK CREEK
1/2 MI S. MIDWAY, Madison, IL
Built 1991 Load: 32.4 t ADT: 1,200
Showing 8,801-8,850 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.