I 90
I 90 in At Railroad Yards S110, Suffolk County, Massachusetts received a condition grade of D (32/100). Built in 1965, the bridge carries 125K vehicles daily on I 90 over HWY Service RD. It is classified as structurally deficient.
I 90 carries a D on the BridgeSafety Condition Score with 32/100. 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 1965 and is now 61 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 124,855 vehicles, with 8 lane(s) crossing HWY Service RD. 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 61-year-old bridge located At Railroad Yards S110 in Suffolk County, Massachusetts. The bridge carries I 90 over HWY Service RD with 8 traffic lanes, handling approximately 125K vehicles per day. Built in 1965, the structure spans 8.5 meters.
The bridge received a Condition Grade of D (32/100) based on Federal Highway Administration inspection data. Its deck is rated 0/9 (serious), superstructure 5/9 (fair), and substructure 5/9 (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 32/100 (Grade D). Its deck is rated 0/9, superstructure 5/9, and substructure 5/9 on the NBI scale. The bridge is classified as structurally deficient.
I 90 was built in 1965, making it 61 years old. The average bridge age in the United States is 48 years.
I 90 carries approximately 125K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 8.5 meters long and located on I 90 in At Railroad Yards S110, Suffolk 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 At Railroad Yards S110 in Suffolk County, Massachusetts. The bridge carries I 90 over HWY Service RD. Its coordinates are 42.356719, -71.127731. It is maintained by State Highway Agency.
I 90 carries I 90 over HWY Service RD. The bridge is 8.5 meters long and was built in 1965.
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.