Somerville RD over I-78 Westbound
FairSomerset County, New Jersey · 2.4 MI East of I-287 · Structure no. 1817161
- Built
- 1968
- 57 years old, rebuilt 2023
- Condition
- Fair
- inspected May 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 89 ft
- 1 main span
- Daily traffic
- 5,258
- 2024 count
- Owner
- State
- State Highway Agency
About this bridge
Somerville RD over I-78 Westbound is a prestressed concrete stringer/multi-beam or girder carrying Somerville RD over I-78 Westbound in Somerset County, New Jersey. It was built in 1968 and reconstructed in 2023, so it is 57 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 fair condition with a lowest component rating of 6 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 5,258 vehicles a day, roughly 1% of them trucks, projected to reach 6,310 by 2044. The structure is 89 ft (27.1 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 9 Excellent | No problems noted. |
| Superstructure | 6 Satisfactory | Structural elements show some minor deterioration. |
| Substructure | 6 Satisfactory | Structural elements show some minor deterioration. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Somerville RD over I-78 Westbound built?
It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2023.
What condition is Somerville RD over I-78 Westbound 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 May 2024.
How much traffic does Somerville RD over I-78 Westbound carry?
About 5,258 vehicles per day (2024 count), of which roughly 1% are trucks.
How long is Somerville RD over I-78 Westbound?
The structure is 89 ft (27.1 m) long with a longest span of 84 ft (25.6 m) and a deck 44 ft wide.
Who owns Somerville RD over I-78 Westbound?
It is owned by the State Highway Agency.