I 93
I 93 in 1 MI S Of JCT I93 & Sr60, Middlesex County, Massachusetts received a condition grade of C (58/100). Built in 1960, the bridge carries 182K vehicles daily on I 93 over ST 16 Myst Val Pky. It is classified as structurally deficient.
I 93 carries a C on the BridgeSafety Condition Score with 58/100. Component ratings sit in the middle of the FHWA NBI distribution; rehabilitation programming is likely on the owning agency’s medium-term horizon.
The bridge was built in 1960 and is now 66 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 93 carries an average daily traffic count of 182,420 vehicles, with 8 lane(s) crossing ST 16 Myst Val Pky. 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 93 is a 66-year-old bridge located 1 MI S Of JCT I93 & Sr60 in Middlesex County, Massachusetts. The bridge carries I 93 over ST 16 Myst Val Pky with 8 traffic lanes, handling approximately 182K vehicles per day. Built in 1960 and reconstructed in 2011, the structure spans 99.1 meters.
The bridge received a Condition Grade of C (58/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), 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 93 has a Condition Score of 58/100 (Grade C). Its deck is rated 7/9, superstructure 7/9, and substructure 4/9 on the NBI scale. The bridge is classified as structurally deficient.
I 93 was built in 1960 and reconstructed in 2011, making it 66 years old. The average bridge age in the United States is 48 years.
I 93 carries approximately 182K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 99.1 meters long and located on I 93 in 1 MI S Of JCT I93 & Sr60, Middlesex County, Massachusetts.
Yes, I 93 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 93 is located 1 MI S Of JCT I93 & Sr60 in Middlesex County, Massachusetts. The bridge carries I 93 over ST 16 Myst Val Pky. Its coordinates are 42.406061, -71.099450. It is maintained by State Highway Agency.
I 93 carries I 93 over ST 16 Myst Val Pky. The bridge is 99.1 meters long and was built in 1960, with reconstruction in 2011.
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.