Structure 124B087 · Middlesex County, NJ

Plainsboro Road over Devils Brook

Carries Plainsboro Road over Devils Brook, 1.0 Mi East Of US RT 1.

Overall conditionPoor

Set by its lowest-rated component: Deck at 4 of 9.

How ratings work
Decksets the rating4/9 · Poor
Superstructure5/9 · Fair
Substructure6/9 · Satisfactory
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT56 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 4/9 · sets the ratingSuperstructure 5/9Substructure 6/9

56 ft end to end. Lengths and the car 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 box-beam bridge.

Built197947 years old
Length56.1 ft17.1 m
Daily traffic5,615counted 2023
Last inspectedMay 2023every 24 months

Location

StateNew Jersey
CountyMiddlesex
Location1.0 Mi East Of US RT 1
CarriesPlainsboro Road
CrossesDevils Brook
Coordinates40.33360, -74.61201

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length56.1 ft (17.1 m)
Max Span51.8 ft (15.8 m)
Deck Width40.4 ft (12.3 m)
Deck Area210.3 sq m
Main Spans1
Year Built1979

Traffic

Avg Daily Traffic5,615 (2023)
Truck Traffic3%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMay 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure Number124B087

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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