GSP NB INNER
Carrying GSP NB INNER over ERNSTON ROAD
2.5 MI S OF RARITAN TOLL, Middlesex, New Jersey
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
GSP NB INNER in Middlesex, New Jersey sits above 27% of rated New Jersey bridges on inventory load rating (31 t), while its 1972 build year is earlier than 45% of Middlesex's recorded-year cohort (563 bridges).
GSP NB INNER in Middlesex, New Jersey is rated Fair in the FHWA's 2024 National Bridge Inventory. Built in 1972, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 5. The lowest applicable rating sets the federal condition category, so this Fair result describes the weakest reported component rather than the structure as a whole. No NBI category is a closure decision or a live crossing-safety verdict.
NBI record plate
Structure NJ:361236I
INTERSTATE-ERA · PRESTRESS · MULTI-SPAN · SUPER-LED · HEAVY-ADT · STANDARD-LOAD · CAT-FAIR
- INTERSTATE-ERA 1950–1979
- PRESTRESS Prestressed concrete
- MULTI-SPAN 3 spans
- SUPER-LED Superstructure-led
- HEAVY-ADT Heavy ADT
- STANDARD-LOAD Standard load
- CAT-FAIR Fair
Inspection-sheet codes from this record’s year, material family, spans, controlling component, ADT, inventory load, and NBI category, not a live closure verdict.
Bridge Snapshot: GSP NB INNER
The GSP NB INNER bridge in Middlesex, New Jersey carries GSP NB INNER over ERNSTON ROAD. It was built in 1972, making it 54 years old today. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 35.1 meters (115 feet) end to end. Daily traffic averages 43,907 vehicles, placing it in the heavily-trafficked tier of New Jersey bridges. It is owned and maintained by State Toll Authority.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 5/9, substructure at 7/9. The weakest component sits in fair condition. None of this bridge's reported major components fall into the Poor condition range.
How GSP NB INNER compares
Age against the county: built in 1972, earlier than 255 of Middlesex's 563 bridges with a recorded construction year (45%), against a county median build year of 1972.
Live comparison across New Jersey bridges with a recorded inventory load rating (6,826 of 6,827 rated).
GSP NB INNER vs every rated New Jersey bridge
Inventory load rating (metric tons), FHWA NBI, this state
31 Top 73% higher than 27% of 6,826 bridges
rated New Jersey bridges, bucketed by value
Each bar is a band; taller bars hold more bridges. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source FHWA National Bridge Inventory · August 2026
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Reported 0–9 component ratings from the FHWA NBI. The highlighted component is the lowest reported input to this record’s current condition category; it is not a closure or live crossing-safety decision.
Middlesex inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 563 bridges in this county. Orthogonal to this structure's component profile above: a county catalog share, not a live crossing-safety verdict.
Structural Details
- Year Built
- 1972
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 35.1 m (115 ft)
- Deck Width
- 16.0 m (52 ft)
- Owner
- State Toll Authority
- Avg Daily Traffic
- 43,907 vehicles/day
- Structure Number
- 361236I
Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • The superstructure (beams and supports above the deck) rates fair at 5/9, minor deterioration that routine maintenance should address.
- • The substructure (piers and abutments) is in good condition (7/9), showing no significant deterioration.
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗How to read this record
This page shows what the last federal inspection recorded, not whether GSP NB INNER is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare GSP NB INNER against other structures in Middlesex and across New Jersey. New Jersey bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for GSP NB INNER?
GSP NB INNER in Middlesex, New Jersey has a deck rating of 7/9, superstructure rating of 5/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is GSP NB INNER inspected?
GSP NB INNER's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 43,907 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. GSP NB INNER is currently shown as Fair condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for GSP NB INNER?
GSP NB INNER has an NBI inventory load rating of 31.1 metric tons.
Who is responsible for maintaining GSP NB INNER?
GSP NB INNER is owned and maintained by State Toll Authority.
How old is GSP NB INNER and does age affect safety?
GSP NB INNER was built in 1972, making it 54 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Share this inspection record
Send this source-bounded record or download its data card. An NBI condition category is not a closure or live crossing-safety verdict.
Every figure on PlainBridges is rendered directly from federal source data, no number is typed in by an editor. Component ratings, ADT, and condition category on this page are copied from the NBI record for this structure; no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2024 NBI release. NBI condition categories reflect the latest reported inventory record, not a live safety, closure, or travel decision.