I 90
I 90 in .1 MI E.Charles Rv S10, Middlesex County, Massachusetts received a condition grade of D (39/100). Built in 1964, the bridge carries 176K vehicles daily on I 90 over HWY Charles ST. It is classified as structurally deficient.
I 90 carries a D on the BridgeSafety Condition Score with 39/100. 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 1964 and is now 62 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 90 carries an average daily traffic count of 176,121 vehicles, with 6 lane(s) crossing HWY Charles ST. 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 90 is a 62-year-old bridge located .1 MI E.Charles Rv S10 in Middlesex County, Massachusetts. The bridge carries I 90 over HWY Charles ST with 6 traffic lanes, handling approximately 176K vehicles per day. Built in 1964, the structure spans 12.5 meters.
The bridge received a Condition Grade of D (39/100) based on Federal Highway Administration inspection data. Its deck is rated 0/9 (serious), superstructure 6/9 (fair), and substructure 6/9 (fair). 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 90 has a Condition Score of 39/100 (Grade D). Its deck is rated 0/9, superstructure 6/9, and substructure 6/9 on the NBI scale. The bridge is classified as structurally deficient.
I 90 was built in 1964, making it 62 years old. The average bridge age in the United States is 48 years.
I 90 carries approximately 176K vehicles per day (average daily traffic). The bridge has 6 traffic lanes. It is 12.5 meters long and located on I 90 in .1 MI E.Charles Rv S10, Middlesex County, Massachusetts.
Yes, I 90 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 90 is located .1 MI E.Charles Rv S10 in Middlesex County, Massachusetts. The bridge carries I 90 over HWY Charles ST. Its coordinates are 42.342542, -71.256969. It is maintained by State Highway Agency.
I 90 carries I 90 over HWY Charles ST. The bridge is 12.5 meters long and was built in 1964.
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.