US Bridges

I-495 over NS Railway

Fair

Fairfax County, Virginia · 1.13 FR 95 & 1.71 to 620 · Structure no. 000000000006568

Built
1961
64 years old, rebuilt 2002
Condition
Fair
inspected March 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
283 ft
3 main spans
Daily traffic
227,699
2022 count
Owner
State
State Highway Agency

About this bridge

I-495 over NS Railway is a steel stringer/multi-beam or girder carrying I-495 over NS Railway in Fairfax County, Virginia. It was built in 1961 and reconstructed in 2002, so it is 64 years old, older than the Virginia average of 50.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 227,699 vehicles a day, roughly 1% of them trucks, projected to reach 253,884 by 2045. The structure is 283 ft (86.3 m) long and 218 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesI-495
CrossesNS Railway
Location1.13 FR 95 & 1.71 to 620
RouteInterstate 495
CountyFairfax County
StateVirginia
Coordinates38.79709, -77.19338
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating45.1 US tons
Inventory rating34.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length283 ft (86.3 m)
Longest span108 ft (32.9 m)
Deck width218 ft (66.4 m)
Roadway width215 ft (65.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic227,699 (2022)
Projected traffic253,884 by 2045
Trucks1%
Lanes on structure14
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed3.7 mi (6 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$150 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-495 over NS Railway built?

It was built in 1961, making it 64 years old in 2025. It was reconstructed in 2002.

What condition is I-495 over NS Railway 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 March 2024.

How much traffic does I-495 over NS Railway carry?

About 227,699 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is I-495 over NS Railway?

The structure is 283 ft (86.3 m) long with a longest span of 108 ft (32.9 m) and a deck 218 ft wide.

Who owns I-495 over NS Railway?

It is owned by the State Highway Agency.