US Bridges

I 495 SB over HWY Northboro RD

Fair

Worcester County, Massachusetts · .5 Mi. N. of Main ST · Structure no. S200191UCDOTNBI

Built
1963
62 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
110 ft
3 main spans
Daily traffic
36,100
2023 count
Owner
State
State Highway Agency

About this bridge

I 495 SB over HWY Northboro RD is a prestressed concrete stringer/multi-beam or girder carrying I 495 SB over HWY Northboro RD in Worcester County, Massachusetts. It was built in 1963, so it is 62 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 36,100 vehicles a day, roughly 8% of them trucks, projected to reach 78,965 by 2032. The structure is 110 ft (33.5 m) long and 53 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

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CarriesI 495 SB
CrossesHWY Northboro RD
Location.5 Mi. N. of Main ST
RouteInterstate 495
CountyWorcester County
StateMassachusetts
Coordinates42.31494, -71.56889
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
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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
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 alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating42.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length110 ft (33.5 m)
Longest span46 ft (14 m)
Deck width53 ft (16.2 m)
Roadway width50 ft (15.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic36,100 (2023)
Projected traffic78,965 by 2032
Trucks8%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed0.6 mi (1 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$5.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 SB over HWY Northboro RD built?

It was built in 1963, making it 62 years old in 2025.

What condition is I 495 SB over HWY Northboro RD 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 May 2023.

How much traffic does I 495 SB over HWY Northboro RD carry?

About 36,100 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is I 495 SB over HWY Northboro RD?

The structure is 110 ft (33.5 m) long with a longest span of 46 ft (14 m) and a deck 53 ft wide.

Who owns I 495 SB over HWY Northboro RD?

It is owned by the State Highway Agency.