US Bridges

Nj 31 over Trenton Line (csx Rr)

Good

Mercer County, New Jersey · 1.0 MI North of CR 546 · Structure no. 1119150

Built
2018
7 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
110 ft
1 main span
Daily traffic
28,699
2024 count
Owner
State
State Highway Agency

About this bridge

Nj 31 over Trenton Line (csx Rr) is a steel stringer/multi-beam or girder carrying Nj 31 over Trenton Line (csx Rr) in Mercer County, New Jersey. It was built in 2018, so it is 7 years old, younger than the New Jersey average of 58.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 28,699 vehicles a day, roughly 6% of them trucks, projected to reach 34,438 by 2044. The structure is 110 ft (33.5 m) long and 65 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNj 31
CrossesTrenton Line (csx Rr)
Location1.0 MI North of CR 546
RouteState Highway 31
CountyMercer County
StateNew Jersey
Coordinates40.31811, -74.79697
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.4 US tons
Inventory rating57.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length110 ft (33.5 m)
Longest span104 ft (31.7 m)
Deck width65 ft (19.7 m)
Roadway width52 ft (15.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic28,699 (2024)
Projected traffic34,438 by 2044
Trucks6%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkNon-Interstate STRAHNET route

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$6.4 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nj 31 over Trenton Line (csx Rr) built?

It was built in 2018, making it 7 years old in 2025.

What condition is Nj 31 over Trenton Line (csx Rr) in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2024.

How much traffic does Nj 31 over Trenton Line (csx Rr) carry?

About 28,699 vehicles per day (2024 count), of which roughly 6% are trucks.

How long is Nj 31 over Trenton Line (csx Rr)?

The structure is 110 ft (33.5 m) long with a longest span of 104 ft (31.7 m) and a deck 65 ft wide.

Who owns Nj 31 over Trenton Line (csx Rr)?

It is owned by the State Highway Agency.