NJ 29
Carrying NJ 29 over NJ 129 & NJT RIVER LINE
1.74 MI NORTH OF I-295, Mercer, New Jersey
Inventory: FHWA NBI 2024 · last ETL August 2026
FHWA NBI record, refreshed with each annual release.
NJ 29 in Mercer, New Jersey sits above 64% of rated New Jersey bridges on inventory load rating (47 t), while its 1995 build year is earlier than 33% of Mercer's recorded-year cohort (412 bridges).
NJ 29 in Mercer, New Jersey is rated Good in the FHWA's 2024 National Bridge Inventory. Built in 1995, it carries 3 rated components on the inspecting agency's 0-9 scale, and its weakest reported component scores 7. The lowest applicable rating sets the federal condition category, so this Good 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:1130154
LATE-CENTURY · STEEL · MULTI-SPAN · TIED-CTRL · HEAVY-ADT · HEAVY-LOAD · CAT-GOOD
- LATE-CENTURY 1980–1999
- STEEL Steel
- MULTI-SPAN 2 spans
- TIED-CTRL Tied control
- HEAVY-ADT Heavy ADT
- HEAVY-LOAD Heavy load
- CAT-GOOD Good
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: NJ 29
The NJ 29 bridge in Mercer, New Jersey carries NJ 29 over NJ 129 & NJT RIVER LINE. It was built in 1995, making it 31 years old today. The structure is built primarily of steel continuous and spans 2 sections, stretching 77.4 meters (254 feet) end to end. Daily traffic averages 56,683 vehicles, placing it in the heavily-trafficked tier of New Jersey bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 7/9, substructure at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds.
How NJ 29 compares
Age against the county: built in 1995, earlier than 137 of Mercer's 412 bridges with a recorded construction year (33%), against a county median build year of 1981. This is one of the newer structures in its county.
Live comparison across New Jersey bridges with a recorded inventory load rating (6,826 of 6,827 rated).
NJ 29 vs every rated New Jersey bridge
Inventory load rating (metric tons), FHWA NBI, this state
47 Top 36% higher than 64% 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.
Mercer inventory by recorded NBI category
Exclusive Good/Fair/Poor bands across all 414 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
- 1995
- Material
- Steel Continuous
- Number of Spans
- 2
- Structure Length
- 77.4 m (254 ft)
- Deck Width
- 41.6 m (136 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 56,683 vehicles/day
- Structure Number
- 1130154
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) is in good condition (7/9), showing no significant deterioration.
- • At 7/9, the substructure (piers and abutments) is in good shape and shows no significant wear.
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 NJ 29 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 NJ 29 against other structures in Mercer 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 NJ 29?
NJ 29 in Mercer, New Jersey has a deck rating of 7/9, superstructure rating of 7/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is NJ 29 inspected?
NJ 29'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 56,683 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. NJ 29 is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for NJ 29?
NJ 29 has an NBI inventory load rating of 47.2 metric tons.
Who is responsible for maintaining NJ 29?
NJ 29 is owned and maintained by State Highway Agency.
How old is NJ 29 and does age affect safety?
NJ 29 was built in 1995, making it 31 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.