US Bridges

Idylwood Rd. over I-495

Good

Fairfax County, Virginia · 00.50FR650 01.00TO7 · Structure no. 000000000028659

Built
2011
14 years old
Condition
Good
inspected February 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
367 ft
2 main spans
Daily traffic
9,968
2022 count
Owner
State
State Highway Agency

About this bridge

Idylwood Rd. over I-495 is a steel continuous stringer/multi-beam or girder carrying Idylwood Rd. over I-495 in Fairfax County, Virginia. It was built in 2011, so it is 14 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 9,968 vehicles a day, roughly 1% of them trucks, projected to reach 12,508 by 2045. The structure is 367 ft (112 m) long and 41 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesIdylwood Rd.
CrossesI-495
Location00.50FR650 01.00TO7
RouteCounty Highway 695
CountyFairfax County
StateVirginia
Coordinates38.89416, -77.21611
Functional classUrban Minor Arterial

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 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating64 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length367 ft (112 m)
Longest span186 ft (56.7 m)
Deck width41 ft (12.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic9,968 (2022)
Projected traffic12,508 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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$2.5 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Idylwood Rd. over I-495 built?

It was built in 2011, making it 14 years old in 2025.

What condition is Idylwood Rd. over I-495 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 2023.

How much traffic does Idylwood Rd. over I-495 carry?

About 9,968 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Idylwood Rd. over I-495?

The structure is 367 ft (112 m) long with a longest span of 186 ft (56.7 m) and a deck 41 ft wide.

Who owns Idylwood Rd. over I-495?

It is owned by the State Highway Agency.