US Bridges

Ramp R over Union R R

Fair

Allegheny County, Pennsylvania · Triboro Expressway · Structure no. 000000000001549

Built
1974
51 years old, rebuilt 2010
Condition
Fair
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,157 ft
11 main spans
Daily traffic
3,419
2024 count
Owner
State
State Highway Agency

About this bridge

Ramp R over Union R R is a steel continuous stringer/multi-beam or girder carrying Ramp R over Union R R in Allegheny County, Pennsylvania. It was built in 1974 and reconstructed in 2010, so it is 51 years old, younger 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 3,419 vehicles a day, roughly 4% of them trucks, projected to reach 3,344 by 2032. The structure is 1,157 ft (352.7 m) long and 32 ft wide.

Location

Open in Google Maps
CarriesRamp R
CrossesUnion R R
LocationTriboro Expressway
RouteState Highway 0
CountyAllegheny County
StatePennsylvania
Coordinates40.39534, -79.83702
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67 US tons
Inventory rating40 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans11 (+1 approach)
Design loadHS 20
Structure length1,157 ft (352.7 m)
Longest span124 ft (37.8 m)
Deck width32 ft (9.8 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,419 (2024)
Projected traffic3,344 by 2032
Trucks4%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed—
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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp R over Union R R built?

It was built in 1974, making it 51 years old in 2025. It was reconstructed in 2010.

What condition is Ramp R over Union R R 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 August 2023.

How much traffic does Ramp R over Union R R carry?

About 3,419 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Ramp R over Union R R?

The structure is 1,157 ft (352.7 m) long with a longest span of 124 ft (37.8 m) and a deck 32 ft wide.

Who owns Ramp R over Union R R?

It is owned by the State Highway Agency.