US Bridges

I 95 /ST128 over RR Mbta/Bmrr

Fair

Middlesex County, Massachusetts · .32 KM Sly Rts 20 & 128 · Structure no. W040262F2DOTNBI

Built
1950
75 years old, rebuilt 1962
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
227 ft
3 main spans
Daily traffic
178,839
2024 count
Owner
State
State Highway Agency

About this bridge

I 95 /ST128 over RR Mbta/Bmrr is a steel continuous stringer/multi-beam or girder carrying I 95 /ST128 over RR Mbta/Bmrr in Middlesex County, Massachusetts. It was built in 1950 and reconstructed in 1962, so it is 75 years old, older 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 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 178,839 vehicles a day, roughly 14% of them trucks, projected to reach 295,329 by 2031. The structure is 227 ft (69.2 m) long and 149 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesI 95 /ST128
CrossesRR Mbta/Bmrr
Location.32 KM Sly Rts 20 & 128
RouteInterstate 95
CountyMiddlesex County
StateMassachusetts
Coordinates42.36729, -71.26975
Functional classUrban Principal Arterial - Other Freeway or Expressway

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 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 geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length227 ft (69.2 m)
Longest span81 ft (24.7 m)
Deck width149 ft (45.5 m)
Roadway width122 ft (37.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic178,839 (2024)
Projected traffic295,329 by 2031
Trucks14%
Lanes on structure9
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 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 statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$31 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 95 /ST128 over RR Mbta/Bmrr built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1962.

What condition is I 95 /ST128 over RR Mbta/Bmrr 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 August 2024.

How much traffic does I 95 /ST128 over RR Mbta/Bmrr carry?

About 178,839 vehicles per day (2024 count), of which roughly 14% are trucks.

How long is I 95 /ST128 over RR Mbta/Bmrr?

The structure is 227 ft (69.2 m) long with a longest span of 81 ft (24.7 m) and a deck 149 ft wide.

Who owns I 95 /ST128 over RR Mbta/Bmrr?

It is owned by the State Highway Agency.