US Bridges

I 495 SB over US 1 Washington ST

Fair

Norfolk County, Massachusetts · I 495 at US 1 · Structure no. P120053RTDOTNBI

Built
1965
60 years old
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
182 ft
2 main spans
Daily traffic
48,754
2019 count
Owner
State
State Highway Agency

About this bridge

I 495 SB over US 1 Washington ST is a steel stringer/multi-beam or girder carrying I 495 SB over US 1 Washington ST 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 48,754 vehicles a day, roughly 5% of them trucks, projected to reach 113,710 by 2032. The structure is 182 ft (55.5 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 495 SB
CrossesUS 1 Washington ST
LocationI 495 at US 1
RouteInterstate 495
CountyNorfolk County
StateMassachusetts
Coordinates42.03708, -71.30681
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 inspectionApril 2023
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 rating62.4 US tons
Inventory rating37.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length182 ft (55.5 m)
Longest span88 ft (26.8 m)
Deck width58 ft (17.7 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic48,754 (2019)
Projected traffic113,710 by 2032
Trucks5%
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 proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$8.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 SB over US 1 Washington ST built?

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

What condition is I 495 SB over US 1 Washington ST 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 April 2023.

How much traffic does I 495 SB over US 1 Washington ST carry?

About 48,754 vehicles per day (2019 count), of which roughly 5% are trucks.

How long is I 495 SB over US 1 Washington ST?

The structure is 182 ft (55.5 m) long with a longest span of 88 ft (26.8 m) and a deck 58 ft wide.

Who owns I 495 SB over US 1 Washington ST?

It is owned by the State Highway Agency.