I 93
I 93 in .6 MI N Of JCT. I93&Sr60, Middlesex County, Massachusetts received a condition grade of B (67/100). Built in 1961, the bridge carries 210K vehicles daily on I 93 over HWY Valley ST & Fllswy.
I 93 carries a B on the BridgeSafety Condition Score with 67/100. Most component ratings are solid; one or two may show wear consistent with the structure’s age, but the bridge is not flagged as structurally deficient.
The bridge was built in 1961 and is now 65 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 210,316 vehicles, with 9 lane(s) crossing HWY Valley ST & Fllswy. 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 65-year-old bridge located .6 MI N Of JCT. I93&Sr60 in Middlesex County, Massachusetts. The bridge carries I 93 over HWY Valley ST & Fllswy with 9 traffic lanes, handling approximately 210K vehicles per day. Built in 1961 and reconstructed in 2011, the structure spans 41.1 meters.
The bridge received a Condition Grade of B (67/100) based on Federal Highway Administration inspection data. Its deck is rated 7/9 (good), superstructure 7/9 (good), and substructure 6/9 (fair).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I 93 has a Condition Score of 67/100 (Grade B). Its deck is rated 7/9, superstructure 7/9, and substructure 6/9 on the NBI scale. The bridge is not classified as structurally deficient.
I 93 was built in 1961 and reconstructed in 2011, making it 65 years old. The average bridge age in the United States is 48 years.
I 93 carries approximately 210K vehicles per day (average daily traffic). The bridge has 9 traffic lanes. It is 41.1 meters long and located on I 93 in .6 MI N Of JCT. I93&Sr60, Middlesex County, Massachusetts.
No, I 93 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
I 93 is located .6 MI N Of JCT. I93&Sr60 in Middlesex County, Massachusetts. The bridge carries I 93 over HWY Valley ST & Fllswy. Its coordinates are 42.425992, -71.103236. It is maintained by State Highway Agency.
I 93 carries I 93 over HWY Valley ST & Fllswy. The bridge is 41.1 meters long and was built in 1961, 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.