US Bridges

Ramp "r" over Diaah and Metrorail

Good

Fairfax County, Virginia · 1.7 Miles from Dulles Air · Structure no. 2100066P0000000

Built
1994
31 years old
Condition
Good
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
279 ft
2 main spans
Daily traffic
13,000
2024 count
Owner
Federal
Metropolitan Washington Airports Service

About this bridge

Ramp "r" over Diaah and Metrorail is a steel continuous stringer/multi-beam or girder carrying Ramp "r" over Diaah and Metrorail in Fairfax County, Virginia. It was built in 1994, so it is 31 years old, younger than the Virginia average of 50.7 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 13,000 vehicles a day, projected to reach 14,300 by 2044. The structure is 279 ft (85 m) long and 45 ft wide.

Location

Open in Google Maps
CarriesRamp "r"
CrossesDiaah and Metrorail
Location1.7 Miles from Dulles Air
CountyFairfax County
StateVirginia
Coordinates38.96214, -77.42492
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionFebruary 2024
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 rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length279 ft (85 m)
Longest span162 ft (49.5 m)
Deck width45 ft (13.6 m)
Roadway width41 ft (12.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,000 (2024)
Projected traffic14,300 by 2044
Trucks—
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerMetropolitan Washington Airports Service
Maintained byMetropolitan Washington Airports Service
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost$17,000 (2021 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Ramp "r" over Diaah and Metrorail built?

It was built in 1994, making it 31 years old in 2025.

What condition is Ramp "r" over Diaah and Metrorail 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 February 2024.

How much traffic does Ramp "r" over Diaah and Metrorail carry?

About 13,000 vehicles per day (2024 count).

How long is Ramp "r" over Diaah and Metrorail?

The structure is 279 ft (85 m) long with a longest span of 162 ft (49.5 m) and a deck 45 ft wide.

Who owns Ramp "r" over Diaah and Metrorail?

It is owned by the Metropolitan Washington Airports Service.