US Bridges

Nj 129 NB over US 1 Ramp "g"

Good

Mercer County, New Jersey · 0.21 MI N of CR 606 · Structure no. 1140153

Built
1994
31 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
80 ft
1 main span
Daily traffic
31,443
2022 count
Owner
State
State Highway Agency

About this bridge

Nj 129 NB over US 1 Ramp "g" is a steel stringer/multi-beam or girder carrying Nj 129 NB over US 1 Ramp "g" in Mercer County, New Jersey. It was built in 1994, so it is 31 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 31,443 vehicles a day, roughly 4% of them trucks, projected to reach 37,732 by 2042. The structure is 80 ft (24.4 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNj 129 NB
CrossesUS 1 Ramp "g"
Location0.21 MI N of CR 606
RouteState Highway 129
CountyMercer County
StateNew Jersey
Coordinates40.21648, -74.75704
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment8: Equal to present desirable criteria
Operating rating110.1 US tons
Inventory rating68 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length80 ft (24.4 m)
Longest span71 ft (21.6 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic31,443 (2022)
Projected traffic37,732 by 2042
Trucks4%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$626,000 (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nj 129 NB over US 1 Ramp "g" built?

It was built in 1994, making it 31 years old in 2025.

What condition is Nj 129 NB over US 1 Ramp "g" 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 April 2024.

How much traffic does Nj 129 NB over US 1 Ramp "g" carry?

About 31,443 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Nj 129 NB over US 1 Ramp "g"?

The structure is 80 ft (24.4 m) long with a longest span of 71 ft (21.6 m) and a deck 28 ft wide.

Who owns Nj 129 NB over US 1 Ramp "g"?

It is owned by the State Highway Agency.