Total Bridges
18,630
Public highway bridges in Indiana
State profile · Below national median SD
Indiana bridge safety
Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Indiana — drawn straight from the FHWA National Bridge Inventory.
- 18,630
- Public bridges
- 36.1%
- Good condition
- 4.9%
- Poor condition
- 4.9%
- Structurally deficient
Good Condition
36.1%
6,733 bridges rated 7-9
-13.9pp vs 50% benchmark
Poor Condition
4.9%
920 bridges rated 0-4
Structurally Deficient
4.9%
920 bridges flagged for repair priority
-2.1pp vs national avg 7.0%
Indiana vs national bridge condition
Indiana — Good condition share 36.1%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
Indiana — Structurally deficient share 16.5%
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 — Indiana (FHWA NBI)
Counties (92)
Adams 191 Allen 601 Bartholomew 263 Benton 147 Blackford 56 Boone 235 Brown 34 Carroll 159 Cass 161 Clark 144 Clay 144 Clinton 205 Crawford 117 Daviess 205 DeKalb 147 Dearborn 139 Decatur 141 Delaware 272 Dubois 214 Elkhart 272 Fayette 98 Floyd 144 Fountain 195 Franklin 158 Fulton 82 Gibson 348 Grant 278 Greene 233 Hamilton 440 Hancock 189 Harrison 124 Hendricks 341 Henry 192 Howard 194 Huntington 183 Jackson 308 Jasper 186 Jay 124 Jefferson 151 Jennings 148 Johnson 213 Knox 282 Kosciusko 145 LaGrange 100 LaPorte 229 Lake 488 Lawrence 158 Madison 297 Marion 964 Marshall 185 Martin 104 Miami 165 Monroe 226 Montgomery 241 Morgan 241 Newton 167 Noble 88 Ohio 41 Orange 133 Owen 143 Parke 195 Perry 146 Pike 164 Porter 280 Posey 205 Pulaski 100 Putnam 284 Randolph 253 Ripley 188 Rush 223 Scott 113 Shelby 243 Spencer 241 St. Joseph 228 Starke 85 Steuben 134 Sullivan 208 Switzerland 62 Tippecanoe 329 Tipton 109 Union 58 Vanderburgh 286 Vermillion 125 Vigo 294 Wabash 189 Warren 136 Warrick 183 Washington 173 Wayne 342 Wells 155 White 214 Whitley 112
Indiana 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 Indiana on the same metric.
05
Arkansas
4.71% top marginal rate
53
Washington
4.81% top marginal rate
18
Indiana
4.94% top marginal rate
20
Kansas
5.25% top marginal rate
56
Wyoming
5.41% top marginal rate
Bridges Needing Most Attention in Indiana
Six lowest-condition bridges in Indiana, ranked by composite NBI rating. Each is inspected at least every 24 months.
MOUNT LIBERTY ROAD
Structurally DeficientOver: MOUNT LIBERTY CREEK
00.10 S 4 MILE RD, Brown, IN
Built 1929 Load: 2.7 t ADT: 150
CR 250W
PoorOver: JONES CREEK
00.70 S of CR 250 N, Putnam, IN
Built 1925 Load: 2.7 t ADT: 180
CR 675W
Structurally DeficientOver: BRANCH OF LEATHERMAN CR
00.20 S of CR 125 N, Putnam, IN
Built 1930 Load: 2.7 t ADT: 130
CR 275S
Structurally DeficientOver: CONRAIL RR
00.50 E of CR 600 W, Putnam, IN
Built 1910 Load: 2.7 t ADT: 130
SHAPED CHARGE ROAD
PoorOver: LITTLE OTTER CREEK
1.2 MILES NORTH OF K RD, Ripley, IN
Built 1899 Load: 2.7 t ADT: 2
WONJU ROAD
PoorOver: TRIBUTARY OF BIG CREEK
0.3 MILE NORTH OF G ROAD, Ripley, IN
Built 1990 Load: 2.7 t ADT: 10
All Bridges in Indiana
I-465 NB
UnknownOver: I-69 SB RAMP
00.20 N I-69, Marion, IN
Built 1968 ADT: 34,007
I-465 SB
UnknownOver: I-69 SB RAMP
00.20 N I-69, Marion, IN
Built 1968 ADT: 34,007
ALLISONVILLE ROAD
UnknownOver: I-465 EBL
01.56 W I-69, Marion, IN
Built 2012 ADT: 78,848
W 96TH STREET
UnknownOver: I-465 EB
01.15 W of US 31, Marion, IN
Built 2007 ADT: 61,891
DITCH ROAD
UnknownOver: I-465 EB
01.50 W US 31, Marion, IN
Built 2020 ADT: 57,640
TOWNSHIP LINE ROAD
UnknownOver: I465 EB
01.35 E US 421, Marion, IN
Built 1966 ADT: 61,891
I-465 EB
UnknownOver: US 421 SBL
03.89 W US-31, Marion, IN
Built 1966 ADT: 38,219
I-465 WB
UnknownOver: US 421 SBL
03.89 W US 31, Marion, IN
Built 1966 ADT: 23,103
I-465 EB
UnknownOver: WEST 96TH STREET
01.22 W US 421, Marion, IN
Built 1967 ADT: 9,263
I-465 WB
UnknownOver: WEST 96TH STREET
01.22 W US 421, Marion, IN
Built 1967 ADT: 9,263
I-465 EB
UnknownOver: ZIONSVILLE ROAD
01.71 W US 421, Marion, IN
Built 1967 ADT: 6,016
I-465 WB
UnknownOver: ZIONSVILLE ROAD
01.71 W US 421, Marion, IN
Built 1967 ADT: 6,016
I-465 NB
UnknownOver: 96TH ST EB & WB
04.40 N I-65, Marion, IN
Built 1968 ADT: 6,086
I-465 SB
UnknownOver: 96TH ST EB & WB
04.40 N I-65, Marion, IN
Built 1968 ADT: 6,086
I-465 NB
UnknownOver: WEST 86TH STREET WB
03.39 N I-65, Marion, IN
Built 2005 ADT: 17,969
I-465 SB
UnknownOver: WEST 86TH STREET WB
03.39 N I-65, Marion, IN
Built 2005 ADT: 17,969
NW LOOP RAMP TO I-
UnknownOver: WEST 86TH STREET WB
03.39 N of I-65, Marion, IN
Built 2005 ADT: 17,969
W 79TH STREET
UnknownOver: I-465 NB
02.39 N I-65, Marion, IN
Built 2004 ADT: 50,616
I-465 RAMP to 73RD
UnknownOver: 71ST ST EB
01.39 N I-65, Marion, IN
Built 2007 ADT: 9,941
I-465 NB
UnknownOver: WEST 71ST STREET - EB
01.39 N of I-65, Marion, IN
Built 2005 ADT: 9,667
I-465 SB, NWL RAMP
UnknownOver: EB W 71ST STREET
01.39 N of I-65, Marion, IN
Built 2005 ADT: 12,171
OLD US 52
UnknownOver: I-465 NB
00.17 N I-65, Marion, IN
Built 1959 ADT: 61,744
I-65 NB RAMP
UnknownOver: I-465 SB
00.16 S I-65, Marion, IN
Built 1959 ADT: 17,447
W 56TH ST EB
UnknownOver: I-465 NB
00.79 S I-65, Marion, IN
Built 1995 ADT: 51,179
W 56TH ST WB
UnknownOver: I-465 NB
00.78 S I-65, Marion, IN
Built 1995 ADT: 51,179
RAMP I465NB-I74WB
UnknownOver: I-465 SB EXIT RAMP
03.00 N US 36, Marion, IN
Built 2012 ADT: 7,539
RAMP I465NB-I74WB
UnknownOver: I-465 NB
02.96 N US 36, Marion, IN
Built 2012 ADT: 67,873
RAMP I74EB-I465SB
UnknownOver: I-465 SB EXIT RAMP
02.91 N US 36, Marion, IN
Built 2012 ADT: 7,539
RAMP I74EB-I465NB
UnknownOver: RAMP I-74 EB to US 136
02.75 N US 36, Marion, IN
Built 2012 ADT: 9,946
I-465 NB
UnknownOver: US 136 EB
02.57 N US 36, Marion, IN
Built 2012 ADT: 15,296
I-465 SB
UnknownOver: US 136 WB
02.57 N US 36, Marion, IN
Built 2012 ADT: 15,437
I-465 NB
UnknownOver: SR 67 NB
00.79 S I-70 W Side, Marion, IN
Built 1961 ADT: 14,500
I-465 SB
UnknownOver: SR 67 SB
00.79 S I-70, Marion, IN
Built 1961 ADT: 14,500
MOORESVILLE ROAD
UnknownOver: I-465 WB
00.34 E SR 67, Marion, IN
Built 2022 ADT: 48,138
MANN ROAD
UnknownOver: I-465 WB
01.19 E SR 67, Marion, IN
Built 2022 ADT: 58,560
I-465 WB
UnknownOver: SR 37 NBL
01.58 W SR 135, Marion, IN
Built 1961 ADT: 15,500
I-465 EB
UnknownOver: BLUFF RD NB & SB
00.77 W SR 135, Marion, IN
Built 1962 ADT: 12,665
I-465 WB
UnknownOver: BLUFF RD NB & SB
00.77 W SR 135, Marion, IN
Built 1962 ADT: 12,665
I-465 EB
UnknownOver: MERIDIAN ST NB
01.74 W US 31, Marion, IN
Built 1962 ADT: 7,400
I-465 WB
UnknownOver: MERIDIAN ST SB
01.74 W US 31, Marion, IN
Built 1962 ADT: 8,360
US 31 SB RAMP
UnknownOver: I-465 WB
00.10 W US-31, Marion, IN
Built 1962 ADT: 44,678
US 31 NB RAMP
UnknownOver: I-465 EB
00.10 E US 31, Marion, IN
Built 1962 ADT: 46,611
LOUISVILLE & IN RR
UnknownOver: I-465 EB
00.71 E US 31, Marion, IN
Built 1963 ADT: 46,611
CARSON AVENUE
UnknownOver: I-465 EBL & RAMP
01.96 E US 31, Marion, IN
Built 2022 ADT: 46,611
SERVICE ROAD
UnknownOver: WEST TUNNEL
00.00 STATE FAIRGROUNDS, Marion, IN
Built 1995 ADT: 133
TRACK OF CHAMPIONS
UnknownOver: EAST TUNNEL ROADWAY
00.00 STATE FAIRGROUNDS, Marion, IN
Built 1936 ADT: 118
WESTFIELD BLVD
UnknownOver: I465 WBL
00.82 W SR 431, Marion, IN
Built 2010 ADT: 62,929
W 10TH STREET
UnknownOver: I-465 NB
01.05 N US 36, Marion, IN
Built 2009 ADT: 76,190
I-465 NB
UnknownOver: MINNESOTA ST EB & WB
00.38 S US 40, Marion, IN
Built 2009 ADT: 1,800
I-465 SB
UnknownOver: MINNESOTA ST
00.38 S US 40, Marion, IN
Built 2009 ADT: 1,800
Showing 1,301-1,350 of 18,630 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 |