INTERSTATE 91
INTERSTATE 91 in 2.3 MI N Of I-95, New Haven County, Connecticut received a condition grade of C (57/100). Built in 1964, the bridge carries 129K vehicles daily on INTERSTATE 91 over N Front ST & Quinn River.
INTERSTATE 91 carries a C on the BridgeSafety Condition Score with 57/100. 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 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. INTERSTATE 91 carries an average daily traffic count of 129,400 vehicles, with 8 lane(s) crossing N Front ST & Quinn River. 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
INTERSTATE 91 is a 62-year-old bridge located 2.3 MI N Of I-95 in New Haven County, Connecticut. The bridge carries INTERSTATE 91 over N Front ST & Quinn River with 8 traffic lanes, handling approximately 129K vehicles per day. Built in 1964 and reconstructed in 2018, the structure spans 156 meters.
The bridge received a Condition Grade of C (57/100) based on Federal Highway Administration inspection data. Its deck is rated 6/9 (fair), superstructure 5/9 (fair), and substructure 6/9 (fair).
This bridge is owned and maintained by State Highway Agency.
Location Map
Frequently Asked Questions
INTERSTATE 91 has a Condition Score of 57/100 (Grade C). Its deck is rated 6/9, superstructure 5/9, and substructure 6/9 on the NBI scale. The bridge is not classified as structurally deficient.
INTERSTATE 91 was built in 1964 and reconstructed in 2018, making it 62 years old. The average bridge age in the United States is 48 years.
INTERSTATE 91 carries approximately 129K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 156 meters long and located on INTERSTATE 91 in 2.3 MI N Of I-95, New Haven County, Connecticut.
No, INTERSTATE 91 is not classified as structurally deficient. All three primary components (deck, superstructure, and substructure) are rated above 4 on the 0-9 NBI scale.
INTERSTATE 91 is located 2.3 MI N Of I-95 in New Haven County, Connecticut. The bridge carries INTERSTATE 91 over N Front ST & Quinn River. Its coordinates are 41.320539, -72.889825. It is maintained by State Highway Agency.
INTERSTATE 91 carries INTERSTATE 91 over N Front ST & Quinn River. The bridge is 156 meters long and was built in 1964, with reconstruction in 2018.
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.