US Bridges

I 495 SB over HWY Summer ST

Poor

Norfolk County, Massachusetts · MM40 .3 MI N of Wrntm Tl · Structure no. F080241VDDOTNBI

Built
1966
59 years old
Condition
Poor
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
95 ft
1 main span
Daily traffic
41,765
2022 count
Owner
State
State Highway Agency

About this bridge

I 495 SB over HWY Summer ST is a steel stringer/multi-beam or girder carrying I 495 SB over HWY Summer 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 41,765 vehicles a day, roughly 6% of them trucks, projected to reach 57,565 by 2032. The structure is 95 ft (29.1 m) long and 55 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

Location

Open in Google Maps
CarriesI 495 SB
CrossesHWY Summer ST
LocationMM40 .3 MI N of Wrntm Tl
RouteInterstate 495
CountyNorfolk County
StateMassachusetts
Coordinates42.05761, -71.38373
Functional classUrban Principal Arterial - Interstate

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.6 US tons
Inventory rating29.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length95 ft (29.1 m)
Longest span91 ft (27.6 m)
Deck width55 ft (16.7 m)
Roadway width52 ft (15.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic41,765 (2022)
Projected traffic57,565 by 2032
Trucks6%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$9.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 SB over HWY Summer ST built?

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

What condition is I 495 SB over HWY Summer ST in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in August 2023.

How much traffic does I 495 SB over HWY Summer ST carry?

About 41,765 vehicles per day (2022 count), of which roughly 6% are trucks.

How long is I 495 SB over HWY Summer ST?

The structure is 95 ft (29.1 m) long with a longest span of 91 ft (27.6 m) and a deck 55 ft wide.

Who owns I 495 SB over HWY Summer ST?

It is owned by the State Highway Agency.