US Bridges

Route 1 & Clark ST over 18th. Street

Fair

Arlington County, Virginia · 046FR223/00.50TO110 · Structure no. 000000000000117

Built
1988
37 years old
Condition
Fair
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
143 ft
2 main spans
Daily traffic
30,266
2022 count
Owner
State
State Highway Agency

About this bridge

Route 1 & Clark ST over 18th. Street is a steel stringer/multi-beam or girder carrying Route 1 & Clark ST over 18th. Street in Arlington County, Virginia. It was built in 1988, so it is 37 years old, younger 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 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 30,266 vehicles a day, roughly 2% of them trucks, projected to reach 42,679 by 2042. The structure is 143 ft (43.6 m) long and 135 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesRoute 1 & Clark ST
Crosses18th. Street
Location046FR223/00.50TO110
RouteU.S. Route 1
CountyArlington County
StateVirginia
Coordinates38.85737, -77.05202
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 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 alignment8: Equal to present desirable criteria
Operating rating59.2 US tons
Inventory rating45.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length143 ft (43.6 m)
Longest span76 ft (23.2 m)
Deck width135 ft (41.1 m)
Roadway width128 ft (39 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,266 (2022)
Projected traffic42,679 by 2042
Trucks2%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.2 mi (2 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 proposedWidening with deck rehabilitation or replacement
Estimated improvement cost$630 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Route 1 & Clark ST over 18th. Street built?

It was built in 1988, making it 37 years old in 2025.

What condition is Route 1 & Clark ST over 18th. Street 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 July 2024.

How much traffic does Route 1 & Clark ST over 18th. Street carry?

About 30,266 vehicles per day (2022 count), of which roughly 2% are trucks.

How long is Route 1 & Clark ST over 18th. Street?

The structure is 143 ft (43.6 m) long with a longest span of 76 ft (23.2 m) and a deck 135 ft wide.

Who owns Route 1 & Clark ST over 18th. Street?

It is owned by the State Highway Agency.