US Bridges

US 20 Wb/Weston ST over I 95 /ST128

Fair

Middlesex County, Massachusetts · Rt 20 WB at Rt 128 · Structure no. W040322E3DOTNBI

Built
1960
65 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
245 ft
2 main spans
Daily traffic
29,822
2024 count
Owner
State
State Highway Agency

About this bridge

US 20 Wb/Weston ST over I 95 /ST128 is a steel continuous stringer/multi-beam or girder carrying US 20 Wb/Weston ST over I 95 /ST128 in Middlesex County, Massachusetts. It was built in 1960, so it is 65 years old, older 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 5 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 29,822 vehicles a day, roughly 13% of them trucks, projected to reach 49,432 by 2031. The structure is 245 ft (74.7 m) long and 46 ft wide.

Location

Open in Google Maps
CarriesUS 20 Wb/Weston ST
CrossesI 95 /ST128
LocationRt 20 WB at Rt 128
RouteU.S. Route 20
CountyMiddlesex County
StateMassachusetts
Coordinates42.37252, -71.26883
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating47.7 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2 (+2 approach)
Design loadH 20
Structure length245 ft (74.7 m)
Longest span86 ft (26.2 m)
Deck width46 ft (14.1 m)
Roadway width36 ft (11 m)
Vertical clearance over deck19 ft (5.9 m)

Traffic and service

Average daily traffic29,822 (2024)
Projected traffic49,432 by 2031
Trucks13%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$10.3 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was US 20 Wb/Weston ST over I 95 /ST128 built?

It was built in 1960, making it 65 years old in 2025.

What condition is US 20 Wb/Weston ST over I 95 /ST128 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 May 2024.

How much traffic does US 20 Wb/Weston ST over I 95 /ST128 carry?

About 29,822 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is US 20 Wb/Weston ST over I 95 /ST128?

The structure is 245 ft (74.7 m) long with a longest span of 86 ft (26.2 m) and a deck 46 ft wide.

Who owns US 20 Wb/Weston ST over I 95 /ST128?

It is owned by the State Highway Agency.