Structure M08889N · Middlesex County, NJ

Njtpk Sni-sno Rwy over Amboy AVE (edison Twp)

Carries Njtpk Sni-sno Rwy over Amboy AVE (edison Twp), 0.7 Mi E Of US 1.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT144 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

144 ft end to end, longest span 60 ft: about 2 semi-trucks nose to tail. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built196957 years old
Length144.0 ft43.9 m
Daily traffic97,296counted 2023
Last inspectedFebruary 2023every 24 months

Location

StateNew Jersey
CountyMiddlesex
Location0.7 Mi E Of US 1
CarriesNjtpk Sni-sno Rwy
CrossesAmboy AVE (edison Twp)
Coordinates40.53239, -74.33031

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length144.0 ft (43.9 m)
Max Span60.0 ft (18.3 m)
Deck Width127.0 ft (38.7 m)
Deck Area1698.9 sq m
Main Spans3
Year Built1969

Traffic

Avg Daily Traffic97,296 (2023)
Truck Traffic10%
Lanes On Bridge6
Lanes Under Bridge2

Inspection & Ownership

Last InspectionFebruary 2023
Inspection FrequencyEvery 24 months
OwnerState Toll Authority
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure NumberM08889N

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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