US Bridges

Is 95 SB Viaduct over Roads Rrs Herring Run

Fair

Baltimore city, Maryland · Milepost 59.6 · Structure no. 300000BCW596012

Built
1974
51 years old
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
3,213 ft
23 main spans
Daily traffic
67,634
2019 count
Owner
Toll Authority
State Toll Authority

About this bridge

Is 95 SB Viaduct over Roads Rrs Herring Run is a steel continuous stringer/multi-beam or girder carrying Is 95 SB Viaduct over Roads Rrs Herring Run in Baltimore city, Maryland. It was built in 1974, so it is 51 years old, younger 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 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 67,634 vehicles a day, roughly 9% of them trucks, projected to reach 91,833 by 2041. The structure is 3,213 ft (979.3 m) long and 62 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesIs 95 SB Viaduct
CrossesRoads Rrs Herring Run
LocationMilepost 59.6
RouteInterstate 95
Coordinates39.29448, -76.53158
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41 US tons
Inventory rating24.5 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans23 (+2 approach)
Design loadHS 20
Structure length3,213 ft (979.3 m)
Longest span238 ft (72.5 m)
Deck width62 ft (18.9 m)
Roadway width59 ft (17.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic67,634 (2019)
Projected traffic91,833 by 2041
Trucks9%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and waterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Is 95 SB Viaduct over Roads Rrs Herring Run built?

It was built in 1974, making it 51 years old in 2025.

What condition is Is 95 SB Viaduct over Roads Rrs Herring Run 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 2023.

How much traffic does Is 95 SB Viaduct over Roads Rrs Herring Run carry?

About 67,634 vehicles per day (2019 count), of which roughly 9% are trucks.

How long is Is 95 SB Viaduct over Roads Rrs Herring Run?

The structure is 3,213 ft (979.3 m) long with a longest span of 238 ft (72.5 m) and a deck 62 ft wide.

Who owns Is 95 SB Viaduct over Roads Rrs Herring Run?

It is owned by the State Toll Authority.