US Bridges

HWY Trapelo RD over I 95 /ST128

Poor

Middlesex County, Massachusetts · 1.4 KM Sly Rt 2 · Structure no. W040242LEDOTNBI

Built
1960
65 years old
Condition
Poor
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
215 ft
4 main spans
Daily traffic
24,727
2018 count
Owner
State
State Highway Agency

About this bridge

HWY Trapelo RD over I 95 /ST128 is a steel continuous stringer/multi-beam or girder carrying HWY Trapelo RD 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 24,727 vehicles a day, roughly 10% of them trucks, projected to reach 43,905 by 2031. The structure is 215 ft (65.5 m) long and 65 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesHWY Trapelo RD
CrossesI 95 /ST128
Location1.4 KM Sly Rt 2
RouteCity Street 0
CountyMiddlesex County
StateMassachusetts
Coordinates42.41529, -71.25729
Functional classUrban Minor 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 inspectionJuly 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 geometry9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating49.3 US tons
Inventory rating29.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadH 20
Structure length215 ft (65.5 m)
Longest span81 ft (24.7 m)
Deck width65 ft (19.8 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic24,727 (2018)
Projected traffic43,905 by 2031
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

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$17.2 million (2025 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was HWY Trapelo RD over I 95 /ST128 built?

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

What condition is HWY Trapelo RD 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 July 2024.

How much traffic does HWY Trapelo RD over I 95 /ST128 carry?

About 24,727 vehicles per day (2018 count), of which roughly 10% are trucks.

How long is HWY Trapelo RD over I 95 /ST128?

The structure is 215 ft (65.5 m) long with a longest span of 81 ft (24.7 m) and a deck 65 ft wide.

Who owns HWY Trapelo RD over I 95 /ST128?

It is owned by the State Highway Agency.