I 93 & RMP SA-CN
I 93 & RMP SA-CN in N Of Td Garden, Suffolk County, Massachusetts received a condition grade of B (63/100). Built in 2002, the bridge carries 155K vehicles daily on I 93 & RMP SA-CN over Water Charles Riv/Ramps.
I 93 & RMP SA-CN carries a B on the BridgeSafety Condition Score with 63/100. 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 2002 and is 24 years old — relatively young against the U.S. bridge stock. Modern bridges built to current FHWA standards generally outperform older structures on condition ratings. I 93 & RMP SA-CN carries an average daily traffic count of 155,200 vehicles, with 10 lane(s) crossing Water Charles Riv/Ramps. 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 & RMP SA-CN is a 24-year-old bridge located N Of Td Garden in Suffolk County, Massachusetts. The bridge carries I 93 & RMP SA-CN over Water Charles Riv/Ramps with 10 traffic lanes, handling approximately 155K vehicles per day. Built in 2002, the structure spans 444.2 meters.
The bridge received a Condition Grade of B (63/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 6/9 (fair), and substructure 5/9 (fair).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
I 93 & RMP SA-CN has a Condition Score of 63/100 (Grade B). Its deck is rated 6/9, superstructure 6/9, and substructure 5/9 on the NBI scale. The bridge is not classified as structurally deficient.
I 93 & RMP SA-CN was built in 2002, making it 24 years old. The average bridge age in the United States is 48 years.
I 93 & RMP SA-CN carries approximately 155K vehicles per day (average daily traffic). The bridge has 10 traffic lanes. It is 444.2 meters long and located on I 93 & RMP SA-CN in N Of Td Garden, Suffolk County, Massachusetts.
No, I 93 & RMP SA-CN 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 & RMP SA-CN is located N Of Td Garden in Suffolk County, Massachusetts. The bridge carries I 93 & RMP SA-CN over Water Charles Riv/Ramps. Its coordinates are 42.368800, -71.063228. It is maintained by State Highway Agency.
I 93 & RMP SA-CN carries I 93 & RMP SA-CN over Water Charles Riv/Ramps. The bridge is 444.2 meters long and was built in 2002.
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.