US Bridges

HWY Ramp U-A over HWY Ramp S-A

Good

Suffolk County, Massachusetts · 1.20 KM SE of Callahan Tu · Structure no. B16563A8KMPANBI

Built
2001
24 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Single or Spread
Prestressed Concrete Continuous
Length
408 ft
4 main spans
Daily traffic
13,000
2001 count
Owner
State
Other State Agency

About this bridge

HWY Ramp U-A over HWY Ramp S-A is a prestressed concrete continuous box beam or girders - single or spread carrying HWY Ramp U-A 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 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 13,000 vehicles a day. The structure is 408 ft (124.5 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHWY Ramp U-A
CrossesHWY Ramp S-A
Location1.20 KM SE of Callahan Tu
CountySuffolk County
StateMassachusetts
Coordinates42.36944, -71.02778
Functional classUrban Local

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.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than 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 length408 ft (124.5 m)
Longest span135 ft (41.2 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck16 ft (4.9 m)

Traffic and service

Average daily traffic13,000 (2001)
Projected traffic—
Trucks0%
Lanes on structure1
Traffic directionOne-way traffic
CarriesOverpass structure at an interchange
CrossesHighway
Detour if closed1.2 mi (2 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$1.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Ramp U-A over HWY Ramp S-A built?

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

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

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

About 13,000 vehicles per day (2001 count).

How long is HWY Ramp U-A over HWY Ramp S-A?

The structure is 408 ft (124.5 m) long with a longest span of 135 ft (41.2 m) and a deck 28 ft wide.

Who owns HWY Ramp U-A over HWY Ramp S-A?

It is owned by the Other State Agency.