Total Bridges
12,699
Public highway bridges in Louisiana
State profile · Above national median SD
Louisiana bridge safety
Condition ratings, load ratings, and structural-deficiency data for every public highway bridge in Louisiana - drawn straight from the FHWA National Bridge Inventory.
- 12,699
- Public bridges
- 36.2%
- Good condition
- 11.0%
- Poor condition
- 11.0%
- Structurally deficient
Data updated May 2026
Good Condition
36.2%
4,603 bridges rated 7-9
-13.8pp vs 50% benchmark
Poor Condition
11.0%
1,397 bridges rated 0-4
Structurally Deficient
11.0%
1,397 bridges flagged for repair priority
4.0pp vs national avg 7.0%
Louisiana vs national bridge condition
Louisiana - Good condition share 36.2%
National avg
Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).
Louisiana - Structurally deficient share 36.7%
National avg
Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.0%.
Condition Distribution
Counties (64)
Acadia 282 Allen 178 Ascension 216 Assumption 68 Avoyelles 147 Beauregard 221 Bienville 190 Bossier 270 Caddo 682 Calcasieu 463 Caldwell 124 Cameron 58 Catahoula 70 Claiborne 148 Concordia 42 De Soto 201 East Baton Rouge 548 East Carroll 55 East Feliciana 133 Evangeline 156 Franklin 131 Grant 209 Iberia 143 Iberville 80 Jackson 163 Jefferson 379 Jefferson Davis 240 LaSalle 195 Lafayette 323 Lafourche 130 Lincoln 171 Livingston 253 Madison 104 Morehouse 136 Natchitoches 313 Orleans 382 Ouachita 337 Plaquemines 34 Pointe Coupee 50 Rapides 523 Red River 63 Richland 207 Sabine 195 St. Bernard 47 St. Charles 82 St. Helena 139 St. James 26 St. John the Baptist 40 St. Landry 317 St. Martin 116 St. Mary 124 St. Tammany 360 Tangipahoa 477 Tensas 52 Terrebonne 215 Union 121 Vermilion 261 Vernon 341 Washington 285 Webster 194 West Baton Rouge 73 West Carroll 88 West Feliciana 108 Winn 220
Louisiana 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 Louisiana on the same metric.
PA
Pennsylvania
10.50% top marginal rate
ND
North Dakota
10.84% top marginal rate
LA
Louisiana
11.00% top marginal rate
PR
Puerto Rico
11.98% top marginal rate
ME
Maine
13.23% top marginal rate
Bridges Needing Most Attention in Louisiana
Six lowest-condition bridges in Louisiana, ranked by composite NBI rating. Each is inspected at least every 24 months.
Layton Coco Xing
Structurally DeficientOver: BAYOU DES GLAISES
0.01 MI. EAST OF LA 451, Avoyelles, LA
Built 1986 Load: 0.9 t ADT: 40
LA1077
Structurally DeficientOver: BLACK BAYOU
1.1 M S OF LA 22, St. Tammany, LA
Built 1965 Load: 0.9 t ADT: 1,019
LA0308
Structurally DeficientOver: BAYOU LAFOURCHE
.01 MI NORTH OF LA 1, Lafourche, LA
Built 1970 Load: 1.0 t ADT: 5,198
Ebeneezer Tap Rd
PoorOver: JONES CREEK
0.65 Mi South of LA 500, LaSalle, LA
Built 1989 Load: 1.2 t ADT: 300
Anderson Rd
Structurally DeficientOver: HYDE BR.
2 MI S OF 1054 & 440, Tangipahoa, LA
Built 1960 Load: 1.2 t ADT: 25
Stubblefield Rd
PoorOver: BAYOU ROUGE
APPROX. 1 M. S. OF LA 361, Avoyelles, LA
Built 1975 Load: 2.3 t ADT: 40
All Bridges in Louisiana
LA0098
UnknownOver: I-10
2.13 MI NE of LA 35, Acadia, LA
ADT: 52,800
LA1096
UnknownOver: I-10
1.5 Mi NE of LA 95, Acadia, LA
ADT: 52,800
RIVERSIDE RD
UnknownOver: I0010
1.9 MI EAST OF LA 97, Acadia, LA
ADT: 46,000
Riverside Rd.
UnknownOver: I0010
0.9 Mi S OF LA 97, Acadia, LA
ADT: 46,000
Trumps Rd
UnknownOver: I0010
6.1 MI EAST OF LA 97, Acadia, LA
ADT: 46,000
Sensat Cove Rd
UnknownOver: INTERSTATE 10
0.4 Mi S of LA 91, Acadia, LA
ADT: 35,000
I0010
UnknownOver: LA0013
I-10 OVER LA 13, Acadia, LA
ADT: 10,600
I0010
UnknownOver: LA0013
I-10 OVER LA 13, Acadia, LA
ADT: 10,600
Caffey Rd.
UnknownOver: I-10
1.1 MI EAST OF LA 1111, Acadia, LA
ADT: 40,700
W. JEFF DAVIS AVE
UnknownOver: I-10
4.8 MI EAST OF LA 1111, Acadia, LA
ADT: 40,700
I0010-E
UnknownOver: LA 35
5.7 Mi E of LA 1111, Acadia, LA
ADT: 13,900
I0010-W
UnknownOver: LA 35
4.6 Mi W of LA 95, Acadia, LA
ADT: 13,900
LA0091
UnknownOver: I0010
3.77 MI NORTH OF US 90, Acadia, LA
ADT: 35,000
LA1111
UnknownOver: LA 1111 OVER I-10
0.5 Mi. N. of US 90, Acadia, LA
ADT: 50,700
LA0095
UnknownOver: I0010
1.02 MI NORTH OF I-10, Acadia, LA
ADT: 52,800
LA0074
UnknownOver: I-10
1.9 Mi. E of LA 928, Ascension, LA
ADT: 72,002
I0010
UnknownOver: LA 73
6.0 Mi. E. of LA 42, Ascension, LA
Built 1975 ADT: 14,894
I0010
UnknownOver: LA 73
4.7 Mi. W. of LA 30, Ascension, LA
ADT: 14,894
I0010
UnknownOver: LA429/Cornerview Rd
2.2 Mi. E. of LA 73, Ascension, LA
Built 1957 ADT: 6,587
I0010
UnknownOver: I-10 OVER LA429/NEW RIVE
I0010, Ascension, LA
Built 1957 ADT: 4,300
I0010
UnknownOver: I-10 OVER LA 30
I0010, Ascension, LA
ADT: 9,200
I0010
UnknownOver: I-10 OVER LA 30
I0010, Ascension, LA
ADT: 13,300
I0010
UnknownOver: I-10 OVER LA 44
JCT LA 44 & I-10, Ascension, LA
ADT: 13,700
I0010
UnknownOver: I-10 OVER LA 44
JCT LA 44 & I-10, Ascension, LA
ADT: 13,700
I0010
UnknownOver: I-10 OVER LA 22
2.9 Mi. E. of LA 44, Ascension, LA
ADT: 22,401
I0010
UnknownOver: I-10 OVER LA 22
JCT LA 22 & I-10, Ascension, LA
ADT: 22,401
I0010
UnknownOver: US 61 & KCS RR
JCT of I-10 & US 61, Ascension, LA
ADT: 9,800
I0010
UnknownOver: US 61 & KCS RR
JCT of I-10 & US 61, Ascension, LA
ADT: 9,800
I0010
UnknownOver: ON RP FR S US61 TO E I10
0.08 M S of I-10&US 61, Ascension, LA
ADT: 13,700
I0010
UnknownOver: I0010
9.1 MI NW of LA 641, Ascension, LA
ADT: 4,280
LA0928
UnknownOver: LA 928 OVER I-10
I0010, Ascension, LA
ADT: 79,453
LA0941
UnknownOver: I-10
JCT of I-10 & LA 941, Ascension, LA
LA0182
UnknownOver: BAYOU BEOUF
US0090, Assumption, LA
ADT: 2,050
LA0070
UnknownOver: DRAIN
2.6 M SW of LA 70&LA 3127, Assumption, LA
ADT: 52,500
US0090
UnknownOver: WEST BOUND RAMP (OFF)
1.0 M W of US 90&LA 662, Assumption, LA
ADT: 12,650
US0090
UnknownOver: EAST BOUND OFF RAMP
0.2 M E of US 90&LA 662, Assumption, LA
ADT: 4,100
US0090
UnknownOver: LA 662, Aligator Bayou
0.8 Mi. E. of Duhon Blvd, Assumption, LA
ADT: 2,050
US0090
UnknownOver: BAYOU BOEUF BR EXTENSION
JCT of US 90 & LA 662, Assumption, LA
ADT: 2,050
LA0001
UnknownOver: ATCHAFALAYA RIVER
0.18 MI. EAST OF LA 105, Avoyelles, LA
ADT: 1,300
I0049
UnknownOver: LA 106
INT. I-49 NORTH & LA 106, Avoyelles, LA
ADT: 1,550
I0049
UnknownOver: LA 106
INT. I-49 @ LA 106, Avoyelles, LA
ADT: 1,550
I0049
UnknownOver: LA 115
INT. I-49 & LA 115, Avoyelles, LA
ADT: 2,400
I0049
UnknownOver: LA 115
INT. I-49 & LA 115, Avoyelles, LA
ADT: 2,400
US0171
UnknownOver: MP RR & US 190
US171 OVER US190 @ RAGLEY, Beauregard, LA
ADT: 9,300
US0171
UnknownOver: MP RR & US 190
6.5 MI S OF LA 110, Beauregard, LA
ADT: 1,450
US0080
UnknownOver: I-20
3.72 M East of LA 532, Bienville, LA
ADT: 29,300
LA0009
UnknownOver: LA 9 OVER I-20 @ ARCADIA
0.5 MI N. OF US 80, Bienville, LA
ADT: 27,205
LA0154
UnknownOver: LA 154 OVER I-20
1.2 MI N OF US 80, Bienville, LA
ADT: 28,700
LA0151
UnknownOver: I-20
LA 151 OVER I-20, Bienville, LA
ADT: 36,000
LA0519
UnknownOver: LA 519 OVER I 20 ARCADI
LA 519 OVER I-20, Bienville, LA
ADT: 29,200
Showing 1-50 of 12,699 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.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.