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
I-55 SB
FairOver: Toledo Peoria & Westrn R
.25 MI N OF US 24, McLean, IL
Built 1977 Load: 32.4 t ADT: 10,500
I-55 NB
FairOver: Toledo Peoria & Westrn R
.25 MI N OF US 24, McLean, IL
Built 1977 Load: 32.4 t ADT: 10,500
FAS 472 CH 12
FairOver: SIX MILE CREEK
0.5 MI W HUDSON, McLean, IL
Built 1989 Load: 32.4 t ADT: 775
TR 239B
FairOver: BRANCH MACKINAW R
3.5 MI SE ANCHOR, McLean, IL
Built 1983 Load: 32.4 t ADT: 100
FAS 492 CH 7
FairOver: MACKINAW RIVER
0.5 MI S ANCHOR, McLean, IL
Built 1985 Load: 32.4 t ADT: 525
Fox Creek Rd(FAU64
FairOver: SOUTHERN PAC RR
1 MI NNW 55 & 74, McLean, IL
Built 1982 Load: 32.4 t ADT: 5,800
CH 30
FairOver: LITTLE KICKAPOO CR
1.0 MI SE 51 & 74, McLean, IL
Built 1990 Load: 32.4 t ADT: 900
TR 161A
FairOver: LITTLE CROOKED CR
4.0 MI SE LEXINGTON, McLean, IL
Built 1990 Load: 32.4 t ADT: 50
TR 602
FairOver: SANGAMON R
1.5 MI SE SAYBROOK, McLean, IL
Built 1978 Load: 32.4 t ADT: 25
TR 608
FairOver: SANGAMON RIVER
2.5 MI SE SAYBROOK, McLean, IL
Built 1982 Load: 32.4 t ADT: 75
FAS 487 CH 36
FairOver: SANGAMON RIVER
W SIDE SAYBROOK, McLean, IL
Built 1989 Load: 32.4 t ADT: 500
TR 23A
FairOver: BROOKS CREEK TRIB
3000N, 2991E, McLean, IL
Built 2003 Load: 32.4 t ADT: 75
TR 562
FairOver: HENLINE CREEK
2.0 MI NE COLFAX, McLean, IL
Built 1980 Load: 32.4 t ADT: 25
TR 56
FairOver: ROCK CREEK
2.0 MI NW CARLOCK, McLean, IL
Built 1980 Load: 32.4 t ADT: 100
TR 36
FairOver: ROCK CREEK
5.0 MI WNW CARLOCK, McLean, IL
Built 1988 Load: 32.4 t ADT: 150
FAS360 CH55
FairOver: W.FORK SUGARCREEK
0.5 MI W DANVERS, McLean, IL
Built 1994 Load: 32.4 t ADT: 550
TR 118A
FairOver: KINGS MILL CREEK
1.3 MI NW TWIN GROVE, McLean, IL
Built 1978 Load: 32.4 t ADT: 150
FAS 494, CH 21
FairOver: N FORK SALT CREEK
1.5 MI SE LEROY, McLean, IL
Built 1982 Load: 32.4 t ADT: 775
TR 483
FairOver: TIMBER CREEK
1.2 MI W FUNKS GROVE, McLean, IL
Built 1980 Load: 32.4 t ADT: 75
TR 98
FairOver: SUGAR CREEK
2.0 MI N FUNKS GROVE, McLean, IL
Built 1980 Load: 32.4 t ADT: 50
CH 37/FAS 480
FairOver: SIX MILE CR
1.0 MI SE HUDSON, McLean, IL
Built 1989 Load: 32.4 t ADT: 2,550
TR 496
FairOver: MACKINAW RIVER
3.5 MI W COLFAX, McLean, IL
Built 1980 Load: 32.4 t ADT: 75
FAS 479 CH 59
FairOver: SUGAR CREEK
1.5 MI NNW MCLEAN, McLean, IL
Built 1975 Load: 32.4 t ADT: 425
TR 345
FairOver: BR KICKAPOO CREEK
3.5 MI NE DOWNS, McLean, IL
Built 1981 Load: 32.4 t ADT: 25
TR 546
FairOver: BRANCH SALT CREEK
3.5 MI NW BELLFLOWER, McLean, IL
Built 1959 Load: 32.4 t ADT: 75
TR 512
FairOver: ROOKS CREEK TR 512
2.0 MI WNW WESTON, McLean, IL
Built 1982 Load: 32.4 t ADT: 75
TR 522
FairOver: ROOKS CREEK
1.0 MI W WESTON, McLean, IL
Built 1982 Load: 32.4 t ADT: 75
TR 548 A
FairOver: ROOKS CREEK
3.8 MI SSE WESTON, McLean, IL
Built 1983 Load: 32.4 t ADT: 75
HERSHEY RD FAU 641
FairOver: BROOKRIDGE CREEK
1.5 MI ENE 55 & 150, McLean, IL
Built 1981 Load: 32.4 t ADT: 2,675
FAU6363 OAKLAND AV
FairOver: SOUTHERN PACIFIC RR
1.2 MI SE 74 & 150, McLean, IL
Built 1991 Load: 32.4 t ADT: 4,750
ADELAIDE ST-FAU 63
FairOver: PHEASANT CREEK
1.4 MI NNW 150 & 51, McLean, IL
Built 1955 Load: 32.4 t ADT: 2,250
HOVEY AVE FAU 6353
FairOver: PHEASANT CREEK
1.2 MI NNW 51 & 150, McLean, IL
Built 1964 Load: 32.4 t ADT: 7,850
BLAIR DR
FairOver: SUGAR CREEK
1.7 MI NNW BUS55 & 9, McLean, IL
Built 1991 Load: 32.4 t ADT: 1,400
TOWANDA AVE
FairOver: SOUTHERN PACIFIC RR
2.4 MI NNW BUS55 & 9, McLean, IL
Built 1994 Load: 32.4 t ADT: 13,700
COLLEGE AVE
FairOver: N FORK SUGAR CR
1.8 MI NE 9/BUS51, McLean, IL
Built 2008 Load: 32.4 t ADT: 12,200
CH 11
FairOver: INDIAN CREEK
2.5 MI N ATHENS, Menard, IL
Built 1953 Load: 32.4 t ADT: 175
TR 122
FairOver: HALLIS BRANCH
1.5 MI W ATHENS, Menard, IL
Built 1984 Load: 32.4 t ADT: 200
TR 120
FairOver: SALT CR
3.0 MI NW GREENVIEW, Menard, IL
Built 1984 Load: 32.4 t ADT: 50
TR 69
FairOver: LITTLE GROVE CREEK
1.5 MI SW ATTERBERRY, Menard, IL
Built 2006 Load: 32.4 t ADT: 25
TR 133
FairOver: ROCK CREEK
4 MI SW ATHENS, Menard, IL
Built 1996 Load: 32.4 t ADT: 325
FAS 575
FairOver: TAR CREEK
2.5 MI E OAKFORD, Menard, IL
Built 2000 Load: 32.4 t ADT: 225
TR-96
FairOver: CRAWFORD BRANCH
2.5 MI NE PETERSBURG, Menard, IL
Built 2000 Load: 32.4 t ADT: 75
FAS 575
FairOver: LOCAL DITCH
0.5 WEST OAKFORD, Menard, IL
Built 1947 Load: 32.4 t ADT: 600
FAS 573
FairOver: CABINESS CK
1 MI SW GREENVIEW, Menard, IL
Built 2002 Load: 32.4 t ADT: 450
TR 30
FairOver: LITTLE GROVE CK
3.8 M W PETERSBURG, Menard, IL
Built 2002 Load: 32.4 t ADT: 25
FAS 1574
FairOver: DRAINAGE DITCH
NW EDGE OF GRNVIEW, Menard, IL
Built 2003 Load: 32.4 t ADT: 250
TR 27
FairOver: Cabiness Creek
1 mi W Greenview, Menard, IL
Built 2013 Load: 32.4 t ADT: 75
FAS 573 (CH 1)
FairOver: TRIB PIKE CREEK
5.1 M E GREENVIEW, Menard, IL
Built 2012 Load: 32.4 t ADT: 325
ILL 94
FairOver: POPE CREEK
3.9 MI S OF ILL 17, Mercer, IL
Built 1924 Load: 32.4 t ADT: 1,900
FAS 1216-CH 3
FairOver: NORTH HENDERSON CR
SW-20-T13NR2W, Mercer, IL
Built 1972 Load: 32.4 t ADT: 25
Showing 8,951-9,000 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.