US Bridges

I 93 over I 95 /ST128

Poor

Middlesex County, Massachusetts · Rt 93 at Rt 128 · Structure no. R030112HKDOTNBI

Built
1957
68 years old, rebuilt 1987
Condition
Poor
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
248 ft
4 main spans
Daily traffic
200,824
2018 count
Owner
State
State Highway Agency

About this bridge

I 93 over I 95 /ST128 is a steel continuous stringer/multi-beam or girder carrying I 93 over I 95 /ST128 in Middlesex County, Massachusetts. It was built in 1957 and reconstructed in 1987, so it is 68 years old, older than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 200,824 vehicles a day, roughly 6% of them trucks, projected to reach 266,586 by 2032. The structure is 248 ft (75.6 m) long and 172 ft wide.

Location

Open in Google Maps
CarriesI 93
CrossesI 95 /ST128
LocationRt 93 at Rt 128
RouteInterstate 93
CountyMiddlesex County
StateMassachusetts
Coordinates42.50222, -71.11889
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMarch 2023
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating43.5 US tons
Inventory rating26.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20 + Mod
Structure length248 ft (75.6 m)
Longest span77 ft (23.5 m)
Deck width172 ft (52.5 m)
Roadway width136 ft (41.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200,824 (2018)
Projected traffic266,586 by 2032
Trucks6%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$53.5 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 93 over I 95 /ST128 built?

It was built in 1957, making it 68 years old in 2025. It was reconstructed in 1987.

What condition is I 93 over I 95 /ST128 in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in March 2023.

How much traffic does I 93 over I 95 /ST128 carry?

About 200,824 vehicles per day (2018 count), of which roughly 6% are trucks.

How long is I 93 over I 95 /ST128?

The structure is 248 ft (75.6 m) long with a longest span of 77 ft (23.5 m) and a deck 172 ft wide.

Who owns I 93 over I 95 /ST128?

It is owned by the State Highway Agency.