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
UPRR
UnknownOver: US 50
SALEM, Marion, IL
Built 1987 ADT: 6,800
OAK STREET 6900
UnknownOver: FAP-805 (ILL-161)
CENTRALIA, Marion, IL
Built 1954 ADT: 7,100
IC RR
UnknownOver: SBI-2B
2MI S SANDOVAL, Marion, IL
Built 1930 ADT: 700
UNION PACIFIC RR
UnknownOver: FAS-2701 (ILL-37)
KINMUNDY, Marion, IL
Built 1900 ADT: 2,000
ICG RR
UnknownOver: FAS-795
.5 MI W CLAY CL, Marion, IL
Built 1900 ADT: 1,000
ICG RR
UnknownOver: TR-323
.5 MI W CLAY CL, Marion, IL
Built 1900 ADT: 10
ICG RR
UnknownOver: TR-528
4.5 MI E IUKA, Marion, IL
Built 1900 ADT: 25
SOUTHERN,IC,&CB&Q
UnknownOver: FAP-805 (ILL-161)
CENTRALIA, Marion, IL
Built 1954 ADT: 7,100
ATCH TOP & SAN FE
UnknownOver: IL 251
1.04 MI S OF ILL 17, Marshall, IL
Built 1963 ADT: 1,200
ILL 18
UnknownOver: ILL RIVER, CROMWELL DR
1.22 MI E OF ILL 29, Marshall, IL
Built 1934 ADT: 125
I-39/US 51(SB)
UnknownOver: TR 39 (FRTG RD WEST)
3.36 MI S OF ILL 18, Marshall, IL
Built 1991 ADT: 50
I-39/US 51(NB)
UnknownOver: TR 39 (FRTG RD WEST)
3.37 MI S OF ILL 18, Marshall, IL
Built 1991 ADT: 50
CH 14
UnknownOver: I-39/US 51
2.19 MI N OF ILL 17, Marshall, IL
Built 1990 ADT: 16,500
TR 69C
UnknownOver: I-39/US 51
1 MI N OF ILL 17, Marshall, IL
Built 1991 ADT: 16,500
IL 17/FAP 649
UnknownOver: I-39/US 51
.45 MI W OF IL 251, Marshall, IL
Built 1989 ADT: 16,500
CH 4 (500 N)
UnknownOver: I-39/US 51
2.02 MI S 0F ILL 17, Marshall, IL
Built 1989 ADT: 16,000
FAS 369 (400 N)
UnknownOver: I-39/US 51
3 MI S OF IL 17, Marshall, IL
Built 1990 ADT: 16,000
TR 121A (200 N)
UnknownOver: I-39/US 51
5 MI S OF IL 17, Marshall, IL
Built 1990 ADT: 16,000
PEDESTRIAN WALKWAY
UnknownOver: MAIN STREET
HAVANA, Mason, IL
Built 1996 ADT: 25
C&NW RR
UnknownOver: TR 125
2 M NE MASON CITY, Mason, IL
Built 1931 ADT: 25
TR 9 RICE HILL RD
UnknownOver: INTERSTATE 24
1 MI S OF JOHNSON CO, Massac, IL
Built 1971 ADT: 21,200
FAS 957 BIG BAY
UnknownOver: INTERSTATE 24
2 MI S OF JOHNSON CO, Massac, IL
Built 1971 ADT: 21,200
TR 45 BENTON RD
UnknownOver: INTERSTATE 24
5 MI S JOHNSON CO, Massac, IL
Built 1971 ADT: 21,200
FAS 959 ROSEBUD RD
UnknownOver: INTERSTATE 24
7 MI S OF JOHNSON CO, Massac, IL
Built 1971 ADT: 21,200
I 24 WB
UnknownOver: TR 86 MASSAC CR RD
4 MI N OF US 45, Massac, IL
Built 1970 ADT: 100
I 24 EB
UnknownOver: TR 86 MASSAC CR RD
4 MI N OF US 45, Massac, IL
Built 1970 ADT: 100
US 45-FAP 889
UnknownOver: INTERSTATE 24
3.5 MI E METROPOLIS, Massac, IL
Built 1970 ADT: 31,200
I 24
UnknownOver: OR 4 FT MASSAC ST PK
1.4 MI S OF US 45, Massac, IL
Built 1970 ADT: 125
I-24 EB
UnknownOver: COUNTRY CLUB ROAD
2 MI N OF US 45, Massac, IL
Built 2019 ADT: 2,000
I-24 WB
UnknownOver: COUNTRY CLUB
2 MI N OF US 45, Massac, IL
Built 2020 ADT: 2,000
I.C.G.R.R.
UnknownOver: US 45
METROPOLIS, Massac, IL
Built 1962 ADT: 7,900
BN
UnknownOver: TR 67
0.1 MI. W. US 45, Massac, IL
Built 1900 ADT: 25
ICG RR
UnknownOver: TR 89
2 MI. S. ROUND KNOB, Massac, IL
Built 1900 ADT: 125
ICG RR
UnknownOver: TR 105
3 MI. N. METROPOLIS, Massac, IL
Built 1900 ADT: 10
ICG RR
UnknownOver: TR 105
3 MI. N. METROPOLIS, Massac, IL
Built 1900 ADT: 10
BN RR
UnknownOver: FAU 9765
W. OF METROPOLIS, Massac, IL
Built 1900 ADT: 325
ICG RR
UnknownOver: FAU 9765
W. OF METROPOLIS, Massac, IL
Built 1900 ADT: 325
US 136EB/WB
UnknownOver: IL 336
app 2mi w of Macomb, McDonough, IL
Built 2013 ADT: 1,600
ADAMS ST
UnknownOver: IL 336
1 Mi N. US 136, McDonough, IL
Built 2012 ADT: 1,600
IL 336
UnknownOver: CH 14
2.06MI N US 136, McDonough, IL
Built 2016 ADT: 475
TOWNSHIP RD 950E
UnknownOver: IL 336
2.92MI N of US 136, McDonough, IL
Built 2015 ADT: 1,600
SPRING LAKE RD/CH
UnknownOver: IL 336
2.06MI W of US 67, McDonough, IL
Built 2016 ADT: 1,600
TOWNSHIP RD 1100E
UnknownOver: IL 336
1.08MI W of US 67, McDonough, IL
Built 2015 ADT: 1,600
BNSF RR
UnknownOver: IL 336 NB & SB
SW MACOMB, McDonough, IL
Built 2007 ADT: 3,800
BNSF RR
UnknownOver: IL 336 RP 7.57
SW MACOMB, McDonough, IL
Built 2007 ADT: 1,250
BNSF RR
UnknownOver: IL 336 East Ramp
SW OF MACOMB, McDonough, IL
Built 2008 ADT: 1,300
US 14
UnknownOver: RR - UP & MCCOOB ST
0.2 M N OF ILL 173, McHenry, IL
Built 1940 ADT: 350
CHIGO MIL RR
UnknownOver: US 12
US 12 S OF RICHMOND, McHenry, IL
Built 1900 ADT: 11,600
CHIGO NORTH WESTER
UnknownOver: ILL 47
ILL 47 WOODSTOCK, McHenry, IL
Built 1936 ADT: 13,200
CHIGO NORTH WESTER
UnknownOver: ILL 176
ILL 176 & CNWRR, McHenry, IL
Built 1940 ADT: 12,800
Showing 2,801-2,850 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.
| Publisher | Kiznis Studio |
| Sources | FHWA National Bridge Inventory, public U.S. government datasets |