US Bridges

I 495 SB over US 3

Fair

Middlesex County, Massachusetts · Rt 495 at Rt 3 · Structure no. C08029AYEDOTNBI

Built
2004
21 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
315 ft
4 main spans
Daily traffic
61,400
2019 count
Owner
State
State Highway Agency

About this bridge

I 495 SB over US 3 is a steel continuous stringer/multi-beam or girder carrying I 495 SB over US 3 in Middlesex County, Massachusetts. It was built in 2004, so it is 21 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 61,400 vehicles a day, roughly 10% of them trucks, projected to reach 197,412 by 2032. The structure is 315 ft (95.9 m) long and 96 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 495 SB
CrossesUS 3
LocationRt 495 at Rt 3
RouteInterstate 495
CountyMiddlesex County
StateMassachusetts
Coordinates42.60743, -71.32571
Functional classUrban Principal Arterial - Interstate

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 inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating92.4 US tons
Inventory rating54.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 25 or greater
Structure length315 ft (95.9 m)
Longest span78 ft (23.7 m)
Deck width96 ft (29.3 m)
Roadway width93 ft (28.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic61,400 (2019)
Projected traffic197,412 by 2032
Trucks10%
Lanes on structure6
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.9 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 SB over US 3 built?

It was built in 2004, making it 21 years old in 2025.

What condition is I 495 SB over US 3 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 June 2023.

How much traffic does I 495 SB over US 3 carry?

About 61,400 vehicles per day (2019 count), of which roughly 10% are trucks.

How long is I 495 SB over US 3?

The structure is 315 ft (95.9 m) long with a longest span of 78 ft (23.7 m) and a deck 96 ft wide.

Who owns I 495 SB over US 3?

It is owned by the State Highway Agency.