US Bridges

I-370 Ramp - B over Crabbs Branch Way

Good

Montgomery County, Maryland · 0.56 MI E of Md 355 · Structure no. 100000150196010

Built
2009
16 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
89 ft
1 main span
Daily traffic
3,953
2010 count
Owner
State
State Highway Agency

About this bridge

I-370 Ramp - B over Crabbs Branch Way is a prestressed concrete stringer/multi-beam or girder carrying I-370 Ramp - B over Crabbs Branch Way in Montgomery County, Maryland. It was built in 2009, so it is 16 years old, younger than the Maryland average of 52.6 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 3,953 vehicles a day, projected to reach 5,692 by 2032. The structure is 89 ft (27.1 m) long and 31 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI-370 Ramp - B
CrossesCrabbs Branch Way
Location0.56 MI E of Md 355
RouteInterstate 370
CountyMontgomery County
StateMaryland
Coordinates39.13133, -77.16985
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.
Substructure8 Very GoodNo problems noted.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating94 US tons
Inventory rating46 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length89 ft (27.1 m)
Longest span86 ft (26.2 m)
Deck width31 ft (9.4 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,953 (2010)
Projected traffic5,692 by 2032
Trucks—
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was I-370 Ramp - B over Crabbs Branch Way built?

It was built in 2009, making it 16 years old in 2025.

What condition is I-370 Ramp - B over Crabbs Branch Way 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 May 2023.

How much traffic does I-370 Ramp - B over Crabbs Branch Way carry?

About 3,953 vehicles per day (2010 count).

How long is I-370 Ramp - B over Crabbs Branch Way?

The structure is 89 ft (27.1 m) long with a longest span of 86 ft (26.2 m) and a deck 31 ft wide.

Who owns I-370 Ramp - B over Crabbs Branch Way?

It is owned by the State Highway Agency.