County profile · official public datasets

Philadelphia County, PA

585 public highway bridges tracked in the FHWA National Bridge Inventory: 22.7% rated Good, 64.1% Fair, 13.2% Poor.

585
Public bridges
22.7%
Good condition
13.2%
Poor condition

The verdict

According to the Federal Highway Administration's 2024 National Bridge Inventory.

Philadelphia County pairs a higher-than-median Poor-condition share among rated counties in the state with an older average build year than the state inventory.

41st
of 67 on Poor share
13.2%
Poor-condition share
585
public highway bridges
1956
avg year built

Poor is an FHWA condition category from the lowest applicable component rating (4 or below), not a live crossing-safety or closure decision. Rankings cover counties with at least five public highway bridges.

Philadelphia County Bridge Snapshot

According to the Federal Highway Administration's 2024 National Bridge Inventory, Philadelphia County ranks #41 of 67 Pennsylvania counties with at least 5 public highway bridges on Poor-condition share (lower share ranks better; currently 13.2%). Philadelphia County, Pennsylvania contains 585 public highway bridges. Roughly 22.7% are rated “Good,” 64.1% “Fair,” and 13.2% “Poor.” Poor means the lowest applicable deck, superstructure, substructure, or culvert rating is 4 or below on the 0–9 NBI scale. It is a condition category, not a live safety or closure decision.

Responsible agencies inspect covered bridges on risk-based intervals under current NBIS rules and submit inventory data to FHWA annually. The list below shows every NBI-tracked bridge in the county. Use the “Sort by” controls to change the ordering, and click any row for its reported inspection date, traffic count, and condition fields.

Source: FHWA National Bridge Inventory. See methodology for full definitions.

Total bridges

585

Public highway bridges in Philadelphia County

Good condition

22.7%

133 of 585 rated 7-9

Fair condition

64.1%

375 of 585 rated 5-6

Poor condition

13.2%

77 of 585 rated 4 or below

In-state Poor-share rank

#41 of 67

Among Pennsylvania counties with 5+ bridges, lower share ranks better

Condition distribution

Share of 585 NBI-tracked bridges by lowest applicable component rating.

Good
22.7% (133)
Fair
64.1% (375)
Poor
13.2% (77)

Philadelphia County's Poor-condition bridges carry 2,260,836 vehicle crossings a day

That is 11.4% of the county's reported daily bridge traffic on 13% of its bridges: Poor-condition structures carry less traffic than their share of the inventory. Each Poor bridge averages 29,748 crossings a day against 36,551 for a Good-condition one. A Poor rating is a condition category, not a closure or a live safety judgement; it means the lowest applicable component rating is 4 or below.

Computed over the 583 of 585 bridges in this county that report an average daily traffic count. Source: FHWA National Bridge Inventory, 2024 release.

69.5% of Philadelphia County's bridges have passed the 50-year mark

406 of the 584 bridges with a recorded construction year were built in 1974 or earlier. Age alone is not a defect: a well-maintained older bridge can rate Good, and 22.7% of this county's inventory does. Even so, this older cohort is the population from which future Poor ratings are drawn, which is why the age profile below matters alongside the condition split above.

Cutoff derives from the 2024 release year minus a 50-year design life. Source: FHWA National Bridge Inventory, 2024 release.

One structure carries 11.1% of the county's Poor-condition bridge traffic

INTERSTATE 95 over TACONY ST.AND BRIDGE ST., built 1967, carries 251,200 vehicles a day, the most of any Poor-rated structure here. The county's Poor-condition exposure is concentrated rather than evenly spread, so the 77-bridge count understates how much of the daily burden sits on a single crossing.

Share is of the 2,260,836 daily crossings on Poor-rated bridges that report a traffic count. Source: FHWA National Bridge Inventory, 2024 release.

When Philadelphia County's bridges were built

584 bridges with a recorded construction year, grouped by decade

bridges

What this shows Construction peaked in the 1960s, when 102 of the county's bridges still in the inventory were built, which is 17.5% of those with a recorded year. That cohort is now 55 to 64 years old in the 2024 inventory. Its average build year is 1956, 14 years older than the Pennsylvania average of 1970.

Source FHWA National Bridge Inventory (year built) As of 2024 NBI release

How Philadelphia County compares with Pennsylvania's closest counties by inventory size

The 5 Pennsylvania counties nearest Philadelphia County in number of bridges, with their condition splits. Its 13.2% Poor share is the 3rd-lowest of these 6. Its average build year of 1956 against a peer-group mean of 1969 is 13 years older.

Showing the 5 closest of 66 Pennsylvania counties eligible for comparison.

Bridge inventory size and condition shares for Philadelphia County and the 5 Pennsylvania counties closest to it in inventory size
County Bridges Poor
Chester County 680 13.7%
Berks County 667 15%
Washington County 655 12.1%
Westmoreland County 620 15.8%
Philadelphia County (this page) 585 13.2%
York County 569 13%

Each share is of that county's own total tracked bridges; peers are the counties with 5 or more bridges whose inventory size is closest to Philadelphia County's. Source: FHWA National Bridge Inventory, 2024 release.

Nationwide counties with similar inventory size or average build year

Two NBI-derived peer sets for Philadelphia County, both outside Pennsylvania so the neighborhoods are not the same-state size table above.

Similar inventory size

Nearest county inventories outside PA (585 bridges here).

Similar average build year

Nearest mean year-built outside PA (1956 here).

Source: FHWA National Bridge Inventory, 2024 release. Peers floor at 10 bridges so stub inventories cannot own the match.

All 585 Good 133 Fair 375 Poor 77

Good-condition bridges (133)

17TH STREET S.B.

Good

Over: VINE STREET EXPRESSWAY

17TH & VINE 3590 D07, Philadelphia, PA

Built 1959 Load: 49.0 t ADT: 9,244

LINDBERGH BLVD.

Good

Over: SEPTA AIRPORT H S LINE

NEAR 58TH STREET 3699E02, Philadelphia, PA

Built 1983 Load: 49.0 t ADT: 17,202

Wissahickon Drive

Good

Over: Branch Wissahickon Crk

S of Wises Mill Rd 16H06, Philadelphia, PA

Built 1979 Load: 49.0 t ADT: 200

COTTON STREET

Good

Over: MANAYUNK CANAL

WEST OF MAIN STREET, Philadelphia, PA

Built 1998 Load: 49.0 t ADT: 10

I-76

Good

Over: TENTH STREET

TENTH ST.OVERPASS 37F06, Philadelphia, PA

Built 1957 Load: 49.2 t ADT: 80,588

ADAMS AVENUE

Good

Over: TACONY CREEK

WEST TRAIN STATION3481B04, Philadelphia, PA

Built 1901 Load: 49.9 t ADT: 20,406

RAMP SV;RAMP S3

Good

Over: SECOND STREET

I-95 AT VINE STR. 3590H07, Philadelphia, PA

Built 1989 Load: 49.9 t ADT: 39,774

15th Street

Good

Over: Abolished Conrail

N. of Callowhill 28F11, Philadelphia, PA

Built 1898 Load: 50.8 t ADT: 7,800

Martins Mill Road

Good

Over: CSX SEPTA (NWTN BR)

at Longshore Avenue 18G06, Philadelphia, PA

Built 1999 Load: 50.8 t ADT: 6,800

RAMP VS

Good

Over: SECOND STREET

I-95 AT VINE STR. 3590H07, Philadelphia, PA

Built 1989 Load: 50.8 t ADT: 19,323

RAMP VN;RAMP VS

Good

Over: THIRD STREET

VINE ST.INTERCH. 3590G07, Philadelphia, PA

Built 1989 Load: 51.7 t ADT: 67,510

52nd Street

Good

Over: SEPTA

S of Baltimore Ave 27G13, Philadelphia, PA

Built 1903 Load: 52.6 t ADT: 9,300

South Street

Good

Over: AMTRAK

East of 33rd Street, Philadelphia, PA

Built 2010 Load: 52.6 t ADT: 18,600

ARAMINGO AVE. (SB)

Good

Over: SPUR A SEPTA GIRARD RP B

NR.DELAWARE AVE.3591A05, Philadelphia, PA

Built 2020 Load: 52.8 t ADT: 11,769

RAMP D

Good

Over: KELLY DRIVE(NB)&RAMP E

GUSTINE LAKE INTC 3479H08, Philadelphia, PA

Built 2002 Load: 55.3 t ADT: 6,248

I-76(RMPS K & L)

Good

Over: PACKER AVENUE

RAMP K-L 37D06, Philadelphia, PA

Built 1957 Load: 56.1 t ADT: 6,937

29TH STREET

Good

Over: AMTRAK N.E.C.

GLENWOOD & SEDGLEY3590A03, Philadelphia, PA

Built 2004 Load: 56.2 t ADT: 5,217

South Street

Good

Over: SEPTA

East of 33rd Street, Philadelphia, PA

Built 2010 Load: 56.2 t ADT: 18,600

RAMP SV

Good

Over: THIRD STREET

VINE ST.INTERCH. 3590G07, Philadelphia, PA

Built 1989 Load: 57.2 t ADT: 24,755

BROAD STREET

Good

Over: READING RAILROAD;ROAD

CENTER CITY 3590E07, Philadelphia, PA

Built 1895 Load: 58.0 t ADT: 25,641

RAMP A 676WB TO 76

Good

Over: RAMP C 676WB TO 76EB

I-76 AT VINE STR.3590A06, Philadelphia, PA

Built 1989 Load: 58.1 t ADT: 68,665

54th Street

Good

Over: AMTRAK

S of Paschall Ave. 36H02, Philadelphia, PA

Built 1977 Load: 63.5 t ADT: 4,200

RAMP VB

Good

Over: FRANKLIN STREET

VINE STR.INTERCH. 3590F07, Philadelphia, PA

Built 1989 Load: 67.1 t ADT: 22,224

Morris Street

Good

Over: SEPTA (Chestnut Hill W.)

N of Coulter Street 17D11, Philadelphia, PA

Built 1921 Load: 69.9 t ADT: 2,600

I676(EB)CONNECTION

Good

Over: FOURTH STREET

VINE ST.INTERCH. 3590G07, Philadelphia, PA

Built 1989 Load: 71.7 t ADT: 67,510

CHESTNUT STREET

Good

Over: CSX RAILROAD

1MI.W.CITY HALL 3590B08, Philadelphia, PA

Built 1901 Load: 72.3 t ADT: 8,190

HOLME AVENUE

Good

Over: WOODEN BRIDGE RUN

NEAR LONGFORD RD 3482G01, Philadelphia, PA

Built 1921 Load: 76.2 t ADT: 19,397

Ashton Road

Good

Over: Wooden Bridge Run

N of Grant Avenue 19J03, Philadelphia, PA

Built 1993 Load: 80.7 t ADT: 1,700

VINE STREET EXWAY.

Good

Over: SIXTH STREET;RAMP B6

VINE ST.INTERCH. 3590G07, Philadelphia, PA

Built 1989 Load: 82.6 t ADT: 100,933

Commerce Street

Good

Over: Penn Ctr Undergrnd Ramp

BTWN.18TH & 19TH 28E12, Philadelphia, PA

Built 1957 Load: 88.0 t ADT: 2,000

RAMP 7NS

Good

Over: 6TH STREET;RAMP B6

VINE-I95 INTERCH.3590G07, Philadelphia, PA

Built 1989 Load: 88.0 t ADT: 29,204

RAMP E

Good

Over: DYOTT STREET SEWER

GIRARD AVE. INTC. 3591A05, Philadelphia, PA

Built 2017 Load: 96.9 t ADT: 14,120

Bloomfield Avenue

Good

Over: Pauls Run Br.Pennypack

E of Verree Road 09B13, Philadelphia, PA

Built 1960 Load: 99.8 t ADT: 6,000

Read our methodology - how this data is sourced, computed, and verified.

Related

Browse all → | Rankings →
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainBridges

Every figure on PlainBridges 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. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.