US Bridges

HWY Ramp T-D over HWY Ramp S-A

Fair

Suffolk County, Massachusetts · 1.20 KM SE of Callahan Tu · Structure no. B16559A9DMPANBI

Built
2001
24 years old
Condition
Fair
inspected September 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
382 ft
4 main spans
Daily traffic
69,000
2001 count
Owner
State
Other State Agency

About this bridge

HWY Ramp T-D over HWY Ramp S-A is a prestressed concrete continuous box beam or girders - single or spread carrying HWY Ramp T-D over HWY Ramp S-A in Suffolk County, Massachusetts. It was built in 2001, so it is 24 years old, younger than the Massachusetts average of 63.8 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 69,000 vehicles a day. The structure is 382 ft (116.3 m) long and 28 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesHWY Ramp T-D
CrossesHWY Ramp S-A
Location1.20 KM SE of Callahan Tu
CountySuffolk County
StateMassachusetts
Coordinates42.36944, -71.02778
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating44.6 US tons

Structure

Structure typeBox Beam or Girders - Single or Spread
MaterialPrestressed Concrete Continuous
DeckOther
Main spans4
Design loadHS 25 or greater
Structure length382 ft (116.3 m)
Longest span133 ft (40.6 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck16 ft (5 m)

Traffic and service

Average daily traffic69,000 (2001)
Projected traffic—
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther State Agency
Maintained byOther State Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$1.6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Ramp T-D over HWY Ramp S-A built?

It was built in 2001, making it 24 years old in 2025.

What condition is HWY Ramp T-D over HWY Ramp S-A 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 September 2023.

How much traffic does HWY Ramp T-D over HWY Ramp S-A carry?

About 69,000 vehicles per day (2001 count).

How long is HWY Ramp T-D over HWY Ramp S-A?

The structure is 382 ft (116.3 m) long with a longest span of 133 ft (40.6 m) and a deck 28 ft wide.

Who owns HWY Ramp T-D over HWY Ramp S-A?

It is owned by the Other State Agency.