US Bridges

Northern Pkwy On-R over Mta Light Rail

Fair

Baltimore city, Maryland · On Ramp SB I-83 · Structure no. 200000BC3120010

Built
1959
66 years old, rebuilt 1987
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
53 ft
1 main span
Daily traffic
23,800
2014 count
Owner
City
City or Municipal Highway Agency

About this bridge

Northern Pkwy On-R over Mta Light Rail is a steel stringer/multi-beam or girder carrying Northern Pkwy On-R over Mta Light Rail in Baltimore city, Maryland. It was built in 1959 and reconstructed in 1987, so it is 66 years old, older than the Maryland average of 52.6 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 23,800 vehicles a day, roughly 8% of them trucks, projected to reach 29,600 by 2036. The structure is 53 ft (16.2 m) long and 28 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesNorthern Pkwy On-R
CrossesMta Light Rail
LocationOn Ramp SB I-83
RouteInterstate 83
Coordinates39.36004, -76.65117
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating61.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length53 ft (16.2 m)
Longest span47 ft (14.3 m)
Deck width28 ft (8.6 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,800 (2014)
Projected traffic29,600 by 2036
Trucks8%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedOther structural work, including hydraulic replacements
Estimated improvement cost$38,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was Northern Pkwy On-R over Mta Light Rail built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 1987.

What condition is Northern Pkwy On-R over Mta Light Rail 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 November 2024.

How much traffic does Northern Pkwy On-R over Mta Light Rail carry?

About 23,800 vehicles per day (2014 count), of which roughly 8% are trucks.

How long is Northern Pkwy On-R over Mta Light Rail?

The structure is 53 ft (16.2 m) long with a longest span of 47 ft (14.3 m) and a deck 28 ft wide.

Who owns Northern Pkwy On-R over Mta Light Rail?

It is owned by the City or Municipal Highway Agency.