US Bridges

I 495 NB over HWY King ST

Good

Norfolk County, Massachusetts · I-495 @ Exit 16 · Structure no. F080231VADOTNBI

Built
1966
59 years old
Condition
Good
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
89 ft
1 main span
Daily traffic
42,890
2020 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over HWY King ST is a steel stringer/multi-beam or girder carrying I 495 NB over HWY King ST in Norfolk County, Massachusetts. It was built in 1966, so it is 59 years old, younger than the Massachusetts average of 63.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 42,890 vehicles a day, roughly 15% of them trucks, projected to reach 63,172 by 2032. The structure is 89 ft (27.1 m) long and 55 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesI 495 NB
CrossesHWY King ST
LocationI-495 @ Exit 16
RouteInterstate 495
CountyNorfolk County
StateMassachusetts
Coordinates42.06506, -71.4009
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.8 US tons
Inventory rating30.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length89 ft (27.1 m)
Longest span84 ft (25.6 m)
Deck width55 ft (16.7 m)
Roadway width49 ft (15 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic42,890 (2020)
Projected traffic63,172 by 2032
Trucks15%
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$4.6 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 NB over HWY King ST built?

It was built in 1966, making it 59 years old in 2025.

What condition is I 495 NB over HWY King ST in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in May 2023.

How much traffic does I 495 NB over HWY King ST carry?

About 42,890 vehicles per day (2020 count), of which roughly 15% are trucks.

How long is I 495 NB over HWY King ST?

The structure is 89 ft (27.1 m) long with a longest span of 84 ft (25.6 m) and a deck 55 ft wide.

Who owns I 495 NB over HWY King ST?

It is owned by the State Highway Agency.