US Bridges

I 495 NB over I 95 SB

Fair

Norfolk County, Massachusetts · I 495 at I 95 · Structure no. F060273RBDOTNBI

Built
1965
60 years old
Condition
Fair
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
114 ft
1 main span
Daily traffic
45,939
2023 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over I 95 SB is a steel stringer/multi-beam or girder carrying I 495 NB over I 95 SB in Norfolk County, Massachusetts. It was built in 1965, so it is 60 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 45,939 vehicles a day, roughly 6% of them trucks, projected to reach 66,331 by 2031. The structure is 114 ft (34.7 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesI 495 NB
CrossesI 95 SB
LocationI 495 at I 95
RouteInterstate 495
CountyNorfolk County
StateMassachusetts
Coordinates42.02695, -71.25739
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.4 US tons
Inventory rating30.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length114 ft (34.7 m)
Longest span109 ft (33.2 m)
Deck width58 ft (17.7 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45,939 (2023)
Projected traffic66,331 by 2031
Trucks6%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 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 statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 NB over I 95 SB built?

It was built in 1965, making it 60 years old in 2025.

What condition is I 495 NB over I 95 SB 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 November 2024.

How much traffic does I 495 NB over I 95 SB carry?

About 45,939 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I 495 NB over I 95 SB?

The structure is 114 ft (34.7 m) long with a longest span of 109 ft (33.2 m) and a deck 58 ft wide.

Who owns I 495 NB over I 95 SB?

It is owned by the State Highway Agency.