State profile · Above median Poor share

Pennsylvania bridge safety

According to the Federal Highway Administration's 2024 National Bridge Inventory, condition ratings, load ratings, and Poor-condition shares for every public highway bridge in Pennsylvania.

23,299
Public bridges
34.0%
Good condition
12.6%
Poor condition

Pennsylvania holds 23,299 public highway bridges (#8 of 52 by inventory) with a 12.58% Poor share (#7 of 52 by Poor share).

That is 12.6% of the state's inventory, against an average of 7.5% across the 54 states and territories with Poor-rated bridges on file, which places it 46 of 54 ordered from the lowest Poor share upward. A bridge is rated Poor when its weakest applicable component scores 4 or below on the inspecting agency's 0-9 scale, so the category is a maintenance and funding signal rather than a closure order or a live crossing-safety verdict.

Inventory: FHWA NBI 2024 · last ETL August 2026

Total Bridges

23,299

Public highway bridges in Pennsylvania

Good Condition

34.0%

7,915 bridges rated 7-9

-16.0pp vs 50% benchmark

Poor Condition

12.6%

2,932 bridges whose lowest applicable component is rated 0-4

5.1pp vs national avg 7.5%

Pennsylvania vs national bridge condition

Pennsylvania - Good condition share 34.0%
National avg

Share of bridges rated 7-9 on the FHWA 0-9 scale (deck, superstructure, substructure all good).

Pennsylvania - Poor-condition share 41.9%
National avg

Lower is better. Bar maxes at 30% (worst-state ceiling). National average sits at 7.5%.

Pennsylvania in the national condition pattern

Each point is a state or territory in the FHWA NBI; the highlighted point is this profile.

Inventory size and Poor-condition share are different measures: Pennsylvania has 23,299 bridges and a 12.6% Poor-condition share in the 2024 NBI, rank #46 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold. Scatter plot of 54 data points. 0%10%20%30%40% 0k20k40k60k Public bridges in inventory (thousands) Poor-condition share (%) PA, Public bridges in inventory (thousands): 23.3k · Poor-condition share (%): 12.58%AL, Public bridges in inventory (thousands): 16.2k · Poor-condition share (%): 3.35%AK, Public bridges in inventory (thousands): 1.7k · Poor-condition share (%): 7.89%AZ, Public bridges in inventory (thousands): 8.6k · Poor-condition share (%): 1.15%AR, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 5.43%CA, Public bridges in inventory (thousands): 25.8k · Poor-condition share (%): 5.91%CO, Public bridges in inventory (thousands): 9k · Poor-condition share (%): 4.82%CT, Public bridges in inventory (thousands): 4.4k · Poor-condition share (%): 4.72%DE, Public bridges in inventory (thousands): 0.9k · Poor-condition share (%): 1.26%DC, Public bridges in inventory (thousands): 0.3k · Poor-condition share (%): 1.95%FL, Public bridges in inventory (thousands): 13k · Poor-condition share (%): 2.79%GA, Public bridges in inventory (thousands): 15.1k · Poor-condition share (%): 1.59%GU, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 12.77%HI, Public bridges in inventory (thousands): 1.2k · Poor-condition share (%): 6.53%ID, Public bridges in inventory (thousands): 4.6k · Poor-condition share (%): 4.9%IL, Public bridges in inventory (thousands): 26.9k · Poor-condition share (%): 9.35%IN, Public bridges in inventory (thousands): 19.5k · Poor-condition share (%): 5.22%IA, Public bridges in inventory (thousands): 23.7k · Poor-condition share (%): 19.16%KS, Public bridges in inventory (thousands): 24.9k · Poor-condition share (%): 5.26%KY, Public bridges in inventory (thousands): 14.5k · Poor-condition share (%): 7.37%LA, Public bridges in inventory (thousands): 12.7k · Poor-condition share (%): 11.48%ME, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 15.41%MD, Public bridges in inventory (thousands): 5.5k · Poor-condition share (%): 4.56%MA, Public bridges in inventory (thousands): 5.3k · Poor-condition share (%): 8.88%MI, Public bridges in inventory (thousands): 11.4k · Poor-condition share (%): 11.27%MN, Public bridges in inventory (thousands): 13.5k · Poor-condition share (%): 4.44%MS, Public bridges in inventory (thousands): 16.7k · Poor-condition share (%): 6.03%MO, Public bridges in inventory (thousands): 24.6k · Poor-condition share (%): 8.95%MT, Public bridges in inventory (thousands): 5.2k · Poor-condition share (%): 6.81%NE, Public bridges in inventory (thousands): 15.4k · Poor-condition share (%): 7.9%NV, Public bridges in inventory (thousands): 2.1k · Poor-condition share (%): 1.14%NH, Public bridges in inventory (thousands): 2.5k · Poor-condition share (%): 7.51%NJ, Public bridges in inventory (thousands): 6.8k · Poor-condition share (%): 6.01%NM, Public bridges in inventory (thousands): 4k · Poor-condition share (%): 4.51%NY, Public bridges in inventory (thousands): 17.6k · Poor-condition share (%): 9.43%NC, Public bridges in inventory (thousands): 19.2k · Poor-condition share (%): 6.76%ND, Public bridges in inventory (thousands): 4.3k · Poor-condition share (%): 10.98%OH, Public bridges in inventory (thousands): 26.7k · Poor-condition share (%): 4.74%OK, Public bridges in inventory (thousands): 22.9k · Poor-condition share (%): 7.7%OR, Public bridges in inventory (thousands): 8.3k · Poor-condition share (%): 4.61%PR, Public bridges in inventory (thousands): 2.4k · Poor-condition share (%): 13.92%RI, Public bridges in inventory (thousands): 0.8k · Poor-condition share (%): 15.2%SC, Public bridges in inventory (thousands): 9.5k · Poor-condition share (%): 6.17%SD, Public bridges in inventory (thousands): 5.9k · Poor-condition share (%): 16.36%TN, Public bridges in inventory (thousands): 20.4k · Poor-condition share (%): 4.41%TX, Public bridges in inventory (thousands): 56.7k · Poor-condition share (%): 1.23%UT, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 2.91%VT, Public bridges in inventory (thousands): 2.9k · Poor-condition share (%): 2.9%VI, Public bridges in inventory (thousands): 0k · Poor-condition share (%): 29.17%VA, Public bridges in inventory (thousands): 14.1k · Poor-condition share (%): 3.39%WA, Public bridges in inventory (thousands): 8.5k · Poor-condition share (%): 5.45%WV, Public bridges in inventory (thousands): 7.3k · Poor-condition share (%): 18.64%WI, Public bridges in inventory (thousands): 14.4k · Poor-condition share (%): 6.52%WY, Public bridges in inventory (thousands): 3.1k · Poor-condition share (%): 6.51%
Inventory size and Poor-condition share are different measures: Pennsylvania has 23,299 bridges and a 12.6% Poor-condition share in the 2024 NBI, rank #46 of 54 jurisdictions ordered from the lowest share upward. The dashed comparisons mark the national average state rate and the midpoint of the plotted inventory range; neither is a live safety or closure threshold.

Pennsylvania vs all states by public bridge inventory

Where this state's FHWA NBI public-highway bridge count sits among every state and territory on PlainBridges

23,299 8th of 54 higher than 46 of 54 states

States and territories, banded by public bridge inventory size

Each bar is a band; taller bars hold more states. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.

Source FHWA National Bridge Inventory · 2024

Read the rank neighborhood for Pennsylvania

The highlighted point is Pennsylvania: 23,299 bridges and 12.58% in Poor condition, rank #46 of 54 jurisdictions ordered from the lowest share upward. The five jurisdictions immediately above and below Pennsylvania on that same Poor-share ordering:

  • Michigan: 11,371 bridges · 11.27% Poor
  • Louisiana: 12,698 bridges · 11.48% Poor
  • Pennsylvania: 23,299 bridges · 12.58% Poor
  • Guam: 47 bridges · 12.77% Poor
  • Puerto Rico: 2,385 bridges · 13.92% Poor

The full national sortable table lives on the rankings page.

Material families in Pennsylvania

Exclusive FHWA material families across all 23,299 bridges in this state; continuous variants fold into the parent family. Orthogonal to the Poor-share scatter above.

Who maintains Pennsylvania’s inventory

State agency holds 70.3% of the 23,299 public highway bridges filed under Pennsylvania in the 2024 NBI, the agency-of-record split for this state, not a condition verdict.

When Pennsylvania’s bridges were built

Pre-1950 construction accounts for 24.8% of the 23,299 bridges with a recorded original year in Pennsylvania. Era bands are orthogonal to the Poor-share ranking above.

Condition Distribution

Pennsylvania34%53.4%12.6%GoodFairPoor
Bridge inventory deck-condition mix - Pennsylvania (FHWA NBI)

Counties (67)

Adams 254 Allegheny 1294 Armstrong 263 Beaver 299 Bedford 417 Berks 667 Blair 338 Bradford 399 Bucks 699 Butler 378 Cambria 284 Cameron 62 Carbon 134 Centre 367 Chester 680 Clarion 172 Clearfield 292 Clinton 212 Columbia 271 Crawford 399 Cumberland 348 Dauphin 449 Delaware 387 Elk 127 Erie 442 Fayette 422 Forest 71 Franklin 294 Fulton 159 Greene 306 Huntingdon 238 Indiana 301 Jefferson 202 Juniata 169 Lackawanna 363 Lancaster 801 Lawrence 265 Lebanon 228 Lehigh 381 Luzerne 457 Lycoming 482 McKean 226 Mercer 438 Mifflin 196 Monroe 315 Montgomery 828 Montour 108 Northampton 356 Northumberland 299 Perry 183 Philadelphia 585 Pike 158 Potter 207 Schuylkill 368 Snyder 161 Somerset 454 Sullivan 119 Susquehanna 284 Tioga 429 Union 163 Venango 189 Warren 217 Washington 655 Wayne 259 Westmoreland 620 Wyoming 140 York 569

Pennsylvania vs nearby ranks

Adjacent states by Poor-condition share (lower share = better)

States are ranked by the share of bridges whose lowest applicable component rating is 4 or below. This describes recorded condition; it does not measure funding effectiveness or live crossing safety. States here sit immediately above and below Pennsylvania on the same metric.

MI

Michigan

11.27% top marginal rate
Structure
Progressive
Burden @ $100K
$11,371

LA

Louisiana

11.48% top marginal rate
Structure
Progressive
Burden @ $100K
$12,698
Selected

PA

Pennsylvania

12.58% top marginal rate
Structure
Progressive
Burden @ $100K
$23,299

GU

Guam

12.77% top marginal rate
Structure
Progressive
Burden @ $100K
$47

PR

Puerto Rico

13.92% top marginal rate
Structure
Progressive
Burden @ $100K
$2,385

Bridges Needing Most Attention in Pennsylvania

Six lowest-condition bridges in Pennsylvania, ranked by the portal's composite display score. Inspection intervals are risk-based under current NBIS rules.

BLVD OF THE ALLIES

Poor

Over: CSX RR & BIKE TRAIL

005 Charles Anderson Brid, Allegheny, PA

Built 1938 Load: 0.0 t ADT: 21,211

TIMBERLAND AV

Poor

Over: SAW MILL RUN CREEK

113 Timberland Ave, Allegheny, PA

Built 1909 Load: 0.0 t ADT: 30

FREMONT ST

Poor

Over: GIRTYS RUN

FREMONT 25 FROM NORTH AV, Allegheny, PA

Built 1911 Load: 0.0 t ADT: 50

OLD WILLIAMPENN HW

Poor

Over: THOMPSON RUN CREEK

446002 OLD WM PENN HGWY, Allegheny, PA

Built 1900 Load: 0.0 t ADT: 300

FALLSTON BR

Poor

Over: BEAVER RIVER

004026 FALLSTON BRIDGE, Beaver, PA

Built 1884 Load: 0.0 t ADT: 6,523

ELEVENTH AVENUE ET

Poor

Over: BLOCKHOUSE RUN

423005 100 YD /13 ST INT, Beaver, PA

Built 1925 Load: 0.0 t

All Bridges in Pennsylvania

I-380 NB (LR 1002)

Fair

Over: SR 4004 (LR 45024)

0.9 MI.N.OF I-80, Monroe, PA

Built 1964 Load: 32.7 t ADT: 11,862

PA 402 (LR 220)

Fair

Over: POND CREEK

MARSHALLS CREEK, Monroe, PA

Built 1940 Load: 32.7 t ADT: 5,534

PA 611 (LR 168)

Fair

Over: SCOT RUN

1MI.S.OF SCOTRUN, Monroe, PA

Built 1948 Load: 32.7 t ADT: 21,965

SR 3005(LR 45003)

Fair

Over: PRINCESS RUN

FIDDLETOWN RD.@ KLEINTOP, Monroe, PA

Built 1932 Load: 32.7 t ADT: 454

SR3009(45066)T-939

Fair

Over: POHOPOCO CREEK

T-939 S.OF MERWINSBURG, Monroe, PA

Built 1918 Load: 32.7 t ADT: 5,532

SR 3021(APPL.5767)

Fair

Over: APPENZELL CREEK

.3 M. N.OF APPENZELL, Monroe, PA

Built 1930 Load: 32.7 t ADT: 1,576

SPRUCE CABIN RD

Fair

Over: BRODHEAD CREEK

CANADENSIS, Monroe, PA

Built 1956 Load: 32.7 t ADT: 159

VALLEY FORGE ROAD

Fair

Over: SCHUYLKILL PARKWAY

BRIDGEPORT 28H10/3367C3, Montgomery, PA

Built 1972 Load: 32.7 t ADT: 6,410

WELSH ROAD

Fair

Over: NORFOLK SOUTHERN

SE OF T-PIKE 31K1/3258H6, Montgomery, PA

Built 1966 Load: 32.7 t ADT: 27,199

MAINLAND ROAD

Fair

Over: SKIPPACK CREEK

MAINLAND 3031C10, Montgomery, PA

Built 1977 Load: 32.7 t ADT: 2,954

BIG ROAD/3029B6

Fair

Over: SCIOTO CREEK

WEST OF PENNA-29 13J05, Montgomery, PA

Built 1956 Load: 32.7 t ADT: 7,835

SPRING GARDEN ST.

Fair

Over: SCHUYLKILL EXPRESSWAY

WEST CONSHOHOCKEN 35E04, Montgomery, PA

Built 1951 Load: 32.7 t ADT: 426

ROUTE 100

Fair

Over: KEYSTONE BOULEVARD

POTTSTOWN 11D11/3138E01, Montgomery, PA

Built 1954 Load: 32.7 t ADT: 34,085

POTTSTOWN EWAY(EB)

Fair

Over: LIMERICK CENTER ROAD

LIMERICK TWP 18K01/3140B4, Montgomery, PA

Built 1984 Load: 32.7 t ADT: 25,953

POTTSTOWN EXWY(WB)

Fair

Over: LIMERICK CENTER ROAD

LIMERICK TWP 18K01/3140B4, Montgomery, PA

Built 1984 Load: 32.7 t ADT: 25,179

P-TOWN X-WAY (EB)

Fair

Over: ROYERSFORD ROAD

N ROYERSFORD 3140F09, Montgomery, PA

Built 1976 Load: 32.7 t ADT: 25,953

POTTSTOWN EWAY(EB)

Fair

Over: LEWIS ROAD

E ROYERSFORD 19D08/3252H1, Montgomery, PA

Built 1976 Load: 32.7 t ADT: 31,365

POTTSTOWN EWAY(WB)

Fair

Over: LEWIS ROAD

E ROYERSFORD 19D08/3252H1, Montgomery, PA

Built 1976 Load: 32.7 t ADT: 30,988

P-TOWN X-WAY (EB)

Fair

Over: MINGO ROAD (T-433)

U PROVIDENCE 19E10/3252H2, Montgomery, PA

Built 1976 Load: 32.7 t ADT: 31,365

P-TOWN X-WAY (WB)

Fair

Over: MINGO ROAD (T-433)

U PROVIDENCE 19E10/3252H2, Montgomery, PA

Built 1976 Load: 32.7 t ADT: 30,988

P-TOWN X-WAY (EB)

Fair

Over: OLD STATE ROAD

U PROVIDENCE 19F11/3252J3, Montgomery, PA

Built 1976 Load: 32.7 t ADT: 31,365

P-TOWN X-WAY (WB)

Fair

Over: OLD STATE ROAD

U PROVIDENCE 19F11/3252J3, Montgomery, PA

Built 1976 Load: 32.7 t ADT: 30,988

POTTSTOWN EWAY(EB)

Fair

Over: TROUTMAN ROAD

N. OF OAKS 27B01/3253E6, Montgomery, PA

Built 1984 Load: 32.7 t ADT: 31,365

POTTSTOWN EWAY(WB)

Fair

Over: TROUTMAN ROAD

S. OF OAKS 27B01/3253F6, Montgomery, PA

Built 1984 Load: 32.7 t ADT: 30,988

MID-COUNTY EXWY-SB

Fair

Over: Balligomingo RD/Gulph CR

WEST CONSHOHOCKEN 3367F09, Montgomery, PA

Built 1972 Load: 32.7 t ADT: 54,564

MID-COUNTY EXWY.

Fair

Over: PLYMOUTH CREEK

NEXT CHEMICAL RD. 3368D04, Montgomery, PA

Built 1989 Load: 32.7 t ADT: 92,993

TRAFFIC ROUTE 663

Fair

Over: MACOBY CR/2805B6

1MI.TO GERYVILLE, Montgomery, PA

Built 1971 Load: 32.7 t ADT: 14,310

STENTON AVENUE

Fair

Over: PAPER MILL RUN/3369-E06

ERDENHEIM 30H13, Montgomery, PA

Built 1978 Load: 32.7 t ADT: 7,909

AIRY ST

Fair

Over: SAW MILL RUN CREEK

NEAR LR178 3367-F2, Montgomery, PA

Built 1931 Load: 32.7 t ADT: 6,882

SOUTH GULPH ROAD

Fair

Over: GULPH CREEK

GULPH MILL INTER 3367F10, Montgomery, PA

Built 1984 Load: 32.7 t ADT: 16,808

SANATOGA ROAD

Fair

Over: SANATOGA CREEK

SANATOGA 3139H01, Montgomery, PA

Built 1961 Load: 32.7 t ADT: 1,672

HANOVER STREET

Fair

Over: SCHUYLKILL RIVER

POTTSTOWN 3138F02, Montgomery, PA

Built 1975 Load: 32.7 t ADT: 7,960

OLD READING PIKE

Fair

Over: YERGERS CREEK

0.4 M N SR422 ADC 3137-J1, Montgomery, PA

Built 1912 Load: 32.7 t ADT: 1,399

FRUITVILLE ROAD

Fair

Over: HARTENSTINE CREEK

0.4 Mi N Ridge Pk 3140-C1, Montgomery, PA

Built 1858 Load: 32.7 t ADT: 1,860

Old Sumneytown Pk

Fair

Over: E BRANCH PERKIOMEN CREEK

.2 Mi W PA-63 3030-C2, Montgomery, PA

Built 1841 Load: 32.7 t ADT: 2,130

GERMANTOWN PIKE

Fair

Over: SKIPPACK CREEK

.4 Mi E SR4008 254-C2, Montgomery, PA

Built 1792 Load: 32.7 t ADT: 14,242

MILL ROAD

Fair

Over: TACONY CREEK

0.5 MI E SR611 3371-A9, Montgomery, PA

Built 1930 Load: 32.7 t ADT: 800

MONTGOMERY AVENUE

Fair

Over: SEPTA (IVY RIDGE BRANCH)

At CYNWYD Station 3479-C9, Montgomery, PA

Built 1926 Load: 32.7 t ADT: 19,416

SWEDESFORD ROAD

Fair

Over: SEPTA BETHLEHEM BR.

.25MI.NW OF RT202 3144-H9, Montgomery, PA

Built 1930 Load: 32.7 t ADT: 1,300

Norris City Avenue

Fair

Over: East Branch Stony Creek

1400 NW US-202SB 3255-G8, Montgomery, PA

Built 1933 Load: 32.7 t ADT: 1,000

WOODLAND AVENUE

Fair

Over: TRIB. W. BR. STONY CREEK

.36MI TO WHITEHALL3255-D5, Montgomery, PA

Built 1960 Load: 32.7 t ADT: 280

KEEN ROAD

Fair

Over: BROOKE EVANS CREEK

2 MI W SR4013 ADC 3139-J5, Montgomery, PA

Built 1930 Load: 32.7 t ADT: 300

TOWNSHIP LINE ROAD

Fair

Over: SCIOTO CREEK

0.4MI NE OF SR 73 3028-F1, Montgomery, PA

Built 1929 Load: 32.7 t ADT: 200

HEIMBACH ROAD

Fair

Over: SCIOTO CREEK

0.4MI NE OFSR0073 3028-G2, Montgomery, PA

Built 1937 Load: 32.7 t ADT: 712

KING OF PRUSSIA RD

Fair

Over: Crow Creek

200 S of US-202 3366-H7, Montgomery, PA

Built 1930 Load: 32.7 t ADT: 300

JONES ROAD

Fair

Over: GULPH MILLS CREEK

UPPER MERION TWP. 3367-H9, Montgomery, PA

Built 1978 Load: 32.7 t ADT: 1,500

JOLLY ROAD

Fair

Over: STONY CREEK

0.5 Mi SE US-202 3256-C6, Montgomery, PA

Built 1970 Load: 32.7 t ADT: 2,500

T-331

Fair

Over: PA TPK (I-276)

EAST OF FT WASH INTERCHG., Montgomery, PA

Built 1954 Load: 32.7 t ADT: 200

CLAHOR AVENUE

Fair

Over: DONNY BROOK

0.33MI NW SR0029 3253-G1, Montgomery, PA

Built 1986 Load: 32.7 t ADT: 1,480

STRATFORD AVENUE

Fair

Over: DONNY BROOK

0.52 MI W.SR 0029 3253-F2, Montgomery, PA

Built 1986 Load: 32.7 t ADT: 150

Showing 4,701-4,750 of 23,299 bridges

Related

All states → | National rankings → | Understanding conditions → | Retired SD term explained →
Data sourced from the FHWA National Bridge Inventory (NBI), latest released cycle. See our methodology for details. Retrieved and formatted by PlainBridges.

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). Poor condition is an inspection-record category, not a closure or unsafe-to-cross designation. Consult the bridge owner for current status.

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.

What to do with this

Use Pennsylvania's inventory picture to drill to a county or a specific span.

  • Browse counties in Pennsylvania and open the highest-Poor shares first. County list
  • See where this state sits among peers on Poor-condition share. State rankings
  • Compare this state with another jurisdiction on the same measures. State compare

NBI condition ratings are inventory snapshots, not live crossing-safety verdicts.

Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Pennsylvania Good/Fair/Poor shares and county rollups on this page are computed from the same NBI extract as the national boards; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.