US Bridges

Shirley Mem HWY over Route 1 Nbl (ramp J)

Good

Fairfax County, Virginia · 01.50FR123/01.70TO642 · Structure no. 000000000023719

Built
1995
30 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
307 ft
3 main spans
Daily traffic
93,639
2022 count
Owner
State
State Highway Agency

About this bridge

Shirley Mem HWY over Route 1 Nbl (ramp J) is a steel continuous stringer/multi-beam or girder carrying Shirley Mem HWY over Route 1 Nbl (ramp J) in Fairfax County, Virginia. It was built in 1995, so it is 30 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 93,639 vehicles a day, roughly 1% of them trucks, projected to reach 107,296 by 2045. The structure is 307 ft (93.6 m) long and 69 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesShirley Mem HWY
CrossesRoute 1 Nbl (ramp J)
Location01.50FR123/01.70TO642
RouteInterstate 95
Coordinates38.68042, -77.23051
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 23 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating47.5 US tons
Inventory rating36.6 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length307 ft (93.6 m)
Longest span126 ft (38.3 m)
Deck width69 ft (21 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic93,639 (2022)
Projected traffic107,296 by 2045
Trucks1%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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$200 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Shirley Mem HWY over Route 1 Nbl (ramp J) built?

It was built in 1995, making it 30 years old in 2025.

What condition is Shirley Mem HWY over Route 1 Nbl (ramp J) 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 Shirley Mem HWY over Route 1 Nbl (ramp J) carry?

About 93,639 vehicles per day (2022 count), of which roughly 1% are trucks.

How long is Shirley Mem HWY over Route 1 Nbl (ramp J)?

The structure is 307 ft (93.6 m) long with a longest span of 126 ft (38.3 m) and a deck 69 ft wide.

Who owns Shirley Mem HWY over Route 1 Nbl (ramp J)?

It is owned by the State Highway Agency.