I 95 /ST128
I 95 /ST128 in 1.6 KM W Of I-93 & I-95, Middlesex County, Massachusetts received a condition grade of D (31/100). Built in 1950, the bridge carries 193K vehicles daily on I 95 /ST128 over RR Mbta/Bmrr. It is classified as structurally deficient.
I 95 /ST128 carries a D on the BridgeSafety Condition Score with 31/100. One or more primary components is rated in fair-to-poor condition; the bridge typically appears in state transportation plans for rehabilitation or replacement within the next funding cycle.
The bridge was built in 1950 and is now 76 years old, at or past the typical 50-year design life for bridges of its vintage. Maintenance and inspection cycles are correspondingly more involved than for newer structures. I 95 /ST128 carries an average daily traffic count of 192,672 vehicles, with 8 lane(s) crossing RR Mbta/Bmrr. The owning agency is State Highway Agency; bridge inspection records flow into the federal NBI database annually.
Component Ratings
The riding surface, evaluated for cracking, spalling, and wear
Beams, girders, and trusses that support the deck
Piers, abutments, and foundations below the deck
Bridge Details
About This Bridge
I 95 /ST128 is a 76-year-old bridge located 1.6 KM W Of I-93 & I-95 in Middlesex County, Massachusetts. The bridge carries I 95 /ST128 over RR Mbta/Bmrr with 8 traffic lanes, handling approximately 193K vehicles per day. Built in 1950 and reconstructed in 1961, the structure spans 37.8 meters.
The bridge received a Condition Grade of D (31/100) based on Federal Highway Administration inspection data. Its deck is rated 4/9 (poor), superstructure 4/9 (poor), and substructure 4/9 (poor). The bridge is classified as structurally deficient, meaning at least one major component is rated 4 or below, this signals a need for repair or replacement but does not necessarily indicate an immediate safety hazard.
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I 95 /ST128 has a Condition Score of 31/100 (Grade D). Its deck is rated 4/9, superstructure 4/9, and substructure 4/9 on the NBI scale. The bridge is classified as structurally deficient.
I 95 /ST128 was built in 1950 and reconstructed in 1961, making it 76 years old. The average bridge age in the United States is 48 years.
I 95 /ST128 carries approximately 193K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 37.8 meters long and located on I 95 /ST128 in 1.6 KM W Of I-93 & I-95, Middlesex County, Massachusetts.
Yes, I 95 /ST128 is classified as structurally deficient because at least one of its primary components (deck, superstructure, or substructure) is rated 4 or below on the 0-9 NBI scale. This does not necessarily mean it is unsafe, but it requires significant repair or replacement.
I 95 /ST128 is located 1.6 KM W Of I-93 & I-95 in Middlesex County, Massachusetts. The bridge carries I 95 /ST128 over RR Mbta/Bmrr. Its coordinates are 42.502114, -71.136528. It is maintained by State Highway Agency.
I 95 /ST128 carries I 95 /ST128 over RR Mbta/Bmrr. The bridge is 37.8 meters long and was built in 1950, with reconstruction in 1961.
Condition Score is calculated from deck (33%), superstructure (33%), and substructure (34%) NBI ratings with an age penalty for bridges over 50 years.
Source: FHWA National Bridge Inventory, 2026.