US Bridges

M Street N.W. over D.C. Convention Center

Fair

District of Columbia, District of Columbia · M Street N.W. · Structure no. 0251

Built
2005
20 years old
Condition
Fair
inspected March 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
386 ft
6 main spans
Daily traffic
8,500
2008 count
Owner
State
State Highway Agency

About this bridge

M Street N.W. over D.C. Convention Center is a steel continuous girder and floorbeam system carrying M Street N.W. over D.C. Convention Center in District of Columbia, District of Columbia. It was built in 2005, so it is 20 years old, younger than the District of Columbia average of 63.7 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 8,500 vehicles a day, roughly 1% of them trucks, projected to reach 8,650 by 2028. The structure is 386 ft (117.7 m) long and 89 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesM Street N.W.
CrossesD.C. Convention Center
LocationM Street N.W.
RouteCity Street 0
CountyDistrict of Columbia
StateDistrict of Columbia
Coordinates38.90565, -77.02381
Functional classUrban Collector

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.
Substructure7 GoodSome minor problems.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.6 US tons
Inventory rating49.6 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadHS 20
Structure length386 ft (117.7 m)
Longest span90 ft (27.4 m)
Deck width89 ft (27.2 m)
Roadway width60 ft (18.3 m)
Vertical clearance over deck15 ft (4.7 m)

Traffic and service

Average daily traffic8,500 (2008)
Projected traffic8,650 by 2028
Trucks1%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesOther
Detour if closed0.6 mi (1 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was M Street N.W. over D.C. Convention Center built?

It was built in 2005, making it 20 years old in 2025.

What condition is M Street N.W. over D.C. Convention Center 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 2023.

How much traffic does M Street N.W. over D.C. Convention Center carry?

About 8,500 vehicles per day (2008 count), of which roughly 1% are trucks.

How long is M Street N.W. over D.C. Convention Center?

The structure is 386 ft (117.7 m) long with a longest span of 90 ft (27.4 m) and a deck 89 ft wide.

Who owns M Street N.W. over D.C. Convention Center?

It is owned by the State Highway Agency.