US Bridges

Nj 34 SB over US 9 NB

Fair

Middlesex County, New Jersey · JCT of Nj 34 at US 9 · Structure no. 1221151

Built
1941
84 years old
Condition
Fair
inspected March 2024
Type
Girder and Floorbeam System
Steel
Length
94 ft
1 main span
Daily traffic
12,001
2022 count
Owner
State
State Highway Agency

About this bridge

Nj 34 SB over US 9 NB is a steel girder and floorbeam system carrying Nj 34 SB over US 9 NB in Middlesex County, New Jersey. It was built in 1941, so it is 84 years old, older than the New Jersey average of 58.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 12,001 vehicles a day, roughly 4% of them trucks, projected to reach 14,643 by 2042. The structure is 94 ft (28.7 m) long and 32 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesNj 34 SB
CrossesUS 9 NB
LocationJCT of Nj 34 at US 9
RouteState Highway 34
CountyMiddlesex County
StateNew Jersey
Coordinates40.43736, -74.30061
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating61 US tons
Inventory rating36 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length94 ft (28.7 m)
Longest span86 ft (26.2 m)
Deck width32 ft (9.8 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deck100 ft (30.5 m)

Traffic and service

Average daily traffic12,001 (2022)
Projected traffic14,643 by 2042
Trucks4%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway and pedestrian
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 statusHistorical significance not determinable at this time
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$2.8 million (2022 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nj 34 SB over US 9 NB built?

It was built in 1941, making it 84 years old in 2025.

What condition is Nj 34 SB over US 9 NB in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2024.

How much traffic does Nj 34 SB over US 9 NB carry?

About 12,001 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Nj 34 SB over US 9 NB?

The structure is 94 ft (28.7 m) long with a longest span of 86 ft (26.2 m) and a deck 32 ft wide.

Who owns Nj 34 SB over US 9 NB?

It is owned by the State Highway Agency.