US Bridges

US 20 Eb/Weston ST over I 95 /ST128

Poor

Middlesex County, Massachusetts · Rt 20 EB at Rt 128 · Structure no. W040332E4DOTNBI

Built
1960
65 years old
Condition
Poor
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
248 ft
4 main spans
Daily traffic
22,500
2024 count
Owner
State
State Highway Agency

About this bridge

US 20 Eb/Weston ST over I 95 /ST128 is a steel continuous stringer/multi-beam or girder carrying US 20 Eb/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 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 22,500 vehicles a day, roughly 7% of them trucks, projected to reach 44,062 by 2031. The structure is 248 ft (75.6 m) long and 50 ft wide.

Location

Open in Google Maps
CarriesUS 20 Eb/Weston ST
CrossesI 95 /ST128
LocationRt 20 EB at Rt 128
RouteU.S. Route 20
CountyMiddlesex County
StateMassachusetts
Coordinates42.37006, -71.26931
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
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionMay 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 geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating34.9 US tons
Inventory rating21.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length248 ft (75.6 m)
Longest span92 ft (28 m)
Deck width50 ft (15.3 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deck17 ft (5.3 m)

Traffic and service

Average daily traffic22,500 (2024)
Projected traffic44,062 by 2031
Trucks7%
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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$17.8 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

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

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

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

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

About 22,500 vehicles per day (2024 count), of which roughly 7% are trucks.

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

The structure is 248 ft (75.6 m) long with a longest span of 92 ft (28 m) and a deck 50 ft wide.

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

It is owned by the State Highway Agency.