US Bridges

Ramp B N.B.On over Future Subway Extension

Fair

Philadelphia County, Pennsylvania · Broad St.Interch. 3700C07 · Structure no. 000000000039309

Built
1969
56 years old
Condition
Fair
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
375 ft
3 main spans
Daily traffic
9,283
2024 count
Owner
State
State Highway Agency

About this bridge

Ramp B N.B.On over Future Subway Extension is a steel continuous stringer/multi-beam or girder carrying Ramp B N.B.On over Future Subway Extension in Philadelphia County, Pennsylvania. It was built in 1969, so it is 56 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 9,283 vehicles a day, roughly 5% of them trucks, projected to reach 9,167 by 2032. The structure is 375 ft (114.3 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesRamp B N.B.On
CrossesFuture Subway Extension
LocationBroad St.Interch. 3700C07
RouteState Highway 0
Coordinates39.89889, -75.17417
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating73 US tons
Inventory rating44 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3 (+1 approach)
Design loadHS 20 + Mod
Structure length375 ft (114.3 m)
Longest span98 ft (29.9 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,283 (2024)
Projected traffic9,167 by 2032
Trucks5%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesOther
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp B N.B.On over Future Subway Extension built?

It was built in 1969, making it 56 years old in 2025.

What condition is Ramp B N.B.On over Future Subway Extension in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in January 2024.

How much traffic does Ramp B N.B.On over Future Subway Extension carry?

About 9,283 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Ramp B N.B.On over Future Subway Extension?

The structure is 375 ft (114.3 m) long with a longest span of 98 ft (29.9 m) and a deck 27 ft wide.

Who owns Ramp B N.B.On over Future Subway Extension?

It is owned by the State Highway Agency.