US Bridges

I 495 NB over HWY School ST

Poor

Bristol County, Massachusetts · 2.0 MI E of I 95 · Structure no. M030303RDDOTNBI

Built
1978
47 years old
Condition
Poor
inspected August 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
96 ft
1 main span
Daily traffic
70,813
2023 count
Owner
State
State Highway Agency

About this bridge

I 495 NB over HWY School ST is a prestressed concrete stringer/multi-beam or girder carrying I 495 NB over HWY School ST in Bristol County, Massachusetts. It was built in 1978, so it is 47 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 70,813 vehicles a day, roughly 4% of them trucks, projected to reach 55,276 by 2031. The structure is 96 ft (29.3 m) long and 57 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesI 495 NB
CrossesHWY School ST
Location2.0 MI E of I 95
RouteInterstate 495
CountyBristol County
StateMassachusetts
Coordinates42.01244, -71.23269
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating61.7 US tons
Inventory rating44.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length96 ft (29.3 m)
Longest span92 ft (28 m)
Deck width57 ft (17.4 m)
Roadway width54 ft (16.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic70,813 (2023)
Projected traffic55,276 by 2031
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 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 with deck rehabilitation or replacement
Estimated improvement cost$5.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was I 495 NB over HWY School ST built?

It was built in 1978, making it 47 years old in 2025.

What condition is I 495 NB over HWY School 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 2024.

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

About 70,813 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is I 495 NB over HWY School ST?

The structure is 96 ft (29.3 m) long with a longest span of 92 ft (28 m) and a deck 57 ft wide.

Who owns I 495 NB over HWY School ST?

It is owned by the State Highway Agency.