US Bridges

HWY Centre ST over Comb I 90 & Csx/Mbta

Poor

Middlesex County, Massachusetts · At Int 17 S28 · Structure no. N120164R6DOTNBI

Built
1964
61 years old
Condition
Poor
inspected January 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
168 ft
3 main spans
Daily traffic
31,422
2024 count
Owner
State
State Highway Agency

About this bridge

HWY Centre ST over Comb I 90 & Csx/Mbta is a steel stringer/multi-beam or girder carrying HWY Centre ST over Comb I 90 & Csx/Mbta in Middlesex County, Massachusetts. It was built in 1964, so it is 61 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 31,422 vehicles a day, roughly 4% of them trucks, projected to reach 21,478 by 2032. The structure is 168 ft (51.2 m) long and 80 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesHWY Centre ST
CrossesComb I 90 & Csx/Mbta
LocationAt Int 17 S28
RouteInterstate 90
Coordinates42.35588, -71.18806
Functional classUrban Other Principal Arterial

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2024
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 rating60.4 US tons
Inventory rating35.9 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length168 ft (51.2 m)
Longest span72 ft (21.9 m)
Deck width80 ft (24.4 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,422 (2024)
Projected traffic21,478 by 2032
Trucks4%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway and railroad
Detour if closed1.9 mi (3 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$12.4 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Centre ST over Comb I 90 & Csx/Mbta built?

It was built in 1964, making it 61 years old in 2025.

What condition is HWY Centre ST over Comb I 90 & Csx/Mbta 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 January 2024.

How much traffic does HWY Centre ST over Comb I 90 & Csx/Mbta carry?

About 31,422 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is HWY Centre ST over Comb I 90 & Csx/Mbta?

The structure is 168 ft (51.2 m) long with a longest span of 72 ft (21.9 m) and a deck 80 ft wide.

Who owns HWY Centre ST over Comb I 90 & Csx/Mbta?

It is owned by the State Highway Agency.