RTE I-78 & RAMP R
RTE I-78 & RAMP R in At Rt 31 Interchange, Hunterdon County, New Jersey received a condition grade of F (0/100). Built in 1948, the bridge carries 130K vehicles daily on RTE I-78 & RAMP R over Beaver Brook. It is classified as structurally deficient.
RTE I-78 & RAMP R carries an F on the BridgeSafety Condition Score with 0/100 — the bottom tier of the FHWA NBI distribution. Component ratings flag the structure for near-term rehabilitation or replacement; the bridge may remain open to traffic but is on the priority list for action.
The bridge was built in 1948 and is now 78 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. RTE I-78 & RAMP R carries an average daily traffic count of 130,244 vehicles, with 8 lane(s) crossing Beaver Brook. 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
RTE I-78 & RAMP R is a 78-year-old bridge located At Rt 31 Interchange in Hunterdon County, New Jersey. The bridge carries RTE I-78 & RAMP R over Beaver Brook with 8 traffic lanes, handling approximately 130K vehicles per day. Built in 1948 and reconstructed in 1966, the structure spans 10.1 meters.
The bridge received a Condition Grade of F (0/100) based on Federal Highway Administration inspection data. Its deck is rated 0/9 (serious), superstructure 0/9 (serious), and substructure 0/9 (serious). 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
RTE I-78 & RAMP R has a Condition Score of 0/100 (Grade F). Its deck is rated 0/9, superstructure 0/9, and substructure 0/9 on the NBI scale. The bridge is classified as structurally deficient.
RTE I-78 & RAMP R was built in 1948 and reconstructed in 1966, making it 78 years old. The average bridge age in the United States is 48 years.
RTE I-78 & RAMP R carries approximately 130K vehicles per day (average daily traffic). The bridge has 8 traffic lanes. It is 10.1 meters long and located on RTE I-78 & RAMP R in At Rt 31 Interchange, Hunterdon County, New Jersey.
Yes, RTE I-78 & RAMP R 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.
RTE I-78 & RAMP R is located At Rt 31 Interchange in Hunterdon County, New Jersey. The bridge carries RTE I-78 & RAMP R over Beaver Brook. Its coordinates are 40.638219, -74.886881. It is maintained by State Highway Agency.
RTE I-78 & RAMP R carries RTE I-78 & RAMP R over Beaver Brook. The bridge is 10.1 meters long and was built in 1948, with reconstruction in 1966.
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.