US Bridges

ST140 over I 495

Fair

Bristol County, Massachusetts · 2.2 Mi. S.E. of I-95 · Structure no. M030313P4DOTNBI

Built
1978
47 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
420 ft
4 main spans
Daily traffic
16,100
2023 count
Owner
State
State Highway Agency

About this bridge

ST140 over I 495 is a steel continuous stringer/multi-beam or girder carrying ST140 over I 495 in Bristol County, Massachusetts. It was built in 1978, so it is 47 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 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 16,100 vehicles a day, roughly 7% of them trucks, projected to reach 39,482 by 2032. The structure is 420 ft (128 m) long and 97 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

Open in Google Maps
CarriesST140
CrossesI 495
Location2.2 Mi. S.E. of I-95
RouteState Highway 140
CountyBristol County
StateMassachusetts
Coordinates42.00653, -71.22446
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating60.1 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length420 ft (128 m)
Longest span126 ft (38.4 m)
Deck width97 ft (29.6 m)
Roadway width94 ft (28.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,100 (2023)
Projected traffic39,482 by 2032
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedDeck rehabilitation with only incidental widening
Estimated improvement cost$17.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was ST140 over I 495 built?

It was built in 1978, making it 47 years old in 2025.

What condition is ST140 over I 495 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 ST140 over I 495 carry?

About 16,100 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is ST140 over I 495?

The structure is 420 ft (128 m) long with a longest span of 126 ft (38.4 m) and a deck 97 ft wide.

Who owns ST140 over I 495?

It is owned by the State Highway Agency.