US Bridges

Ramp D over Ramp a

Good

Allegheny County, Pennsylvania · Wilkinsburg Interchange · Structure no. 000000000002772

Built
1952
73 years old, rebuilt 2008
Condition
Good
inspected July 2023
Type
Frame
Concrete
Length
53 ft
1 main span
Daily traffic
6,502
2024 count
Owner
State
State Highway Agency

About this bridge

Ramp D over Ramp a is a concrete frame carrying Ramp D over Ramp a in Allegheny County, Pennsylvania. It was built in 1952 and reconstructed in 2008, so it is 73 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 6,502 vehicles a day, roughly 7% of them trucks, projected to reach 9,211 by 2032. The structure is 53 ft (16.2 m) long and 33 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesRamp D
CrossesRamp a
LocationWilkinsburg Interchange
RouteState Highway 0
Coordinates40.42833, -79.86667
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54 US tons
Inventory rating36 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span44 ft (13.4 m)
Deck width33 ft (10.2 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,502 (2024)
Projected traffic9,211 by 2032
Trucks7%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 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 D over Ramp a built?

It was built in 1952, making it 73 years old in 2025. It was reconstructed in 2008.

What condition is Ramp D over Ramp a in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2023.

How much traffic does Ramp D over Ramp a carry?

About 6,502 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Ramp D over Ramp a?

The structure is 53 ft (16.2 m) long with a longest span of 44 ft (13.4 m) and a deck 33 ft wide.

Who owns Ramp D over Ramp a?

It is owned by the State Highway Agency.