US Bridges

129SB Ramp to 29SB over Nj 129 NB & Nj Transit

Good

Mercer County, New Jersey · 1.6 MI North of I-295 · Structure no. 1130155

Built
1995
30 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
305 ft
2 main spans
Daily traffic
13,252
2024 count
Owner
State
State Highway Agency

About this bridge

129SB Ramp to 29SB over Nj 129 NB & Nj Transit is a steel continuous stringer/multi-beam or girder carrying 129SB Ramp to 29SB over Nj 129 NB & Nj Transit in Mercer County, New Jersey. It was built in 1995, so it is 30 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 13,252 vehicles a day, roughly 5% of them trucks, projected to reach 16,170 by 2044. The structure is 305 ft (93 m) long and 44 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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Carries129SB Ramp to 29SB
CrossesNj 129 NB & Nj Transit
Location1.6 MI North of I-295
RouteState Highway 29
CountyMercer County
StateNew Jersey
Coordinates40.18981, -74.75082
Functional classUrban Principal Arterial - Other Freeway or Expressway

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 inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating83 US tons
Inventory rating49.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length305 ft (93 m)
Longest span150 ft (45.7 m)
Deck width44 ft (13.5 m)
Roadway width41 ft (12.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,252 (2024)
Projected traffic16,170 by 2044
Trucks5%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway and railroad
Detour if closed3.7 mi (6 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was 129SB Ramp to 29SB over Nj 129 NB & Nj Transit built?

It was built in 1995, making it 30 years old in 2025.

What condition is 129SB Ramp to 29SB over Nj 129 NB & Nj Transit 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 July 2024.

How much traffic does 129SB Ramp to 29SB over Nj 129 NB & Nj Transit carry?

About 13,252 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is 129SB Ramp to 29SB over Nj 129 NB & Nj Transit?

The structure is 305 ft (93 m) long with a longest span of 150 ft (45.7 m) and a deck 44 ft wide.

Who owns 129SB Ramp to 29SB over Nj 129 NB & Nj Transit?

It is owned by the State Highway Agency.