US Bridges

Martinsville RD SB over I-78

Fair

Somerset County, New Jersey · 3.7 MI East of I-287 Jct. · Structure no. 1817162

Built
1965
60 years old, rebuilt 1995
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
261 ft
5 main spans
Daily traffic
14,871
2023 count
Owner
State
State Highway Agency

About this bridge

Martinsville RD SB over I-78 is a prestressed concrete stringer/multi-beam or girder carrying Martinsville RD SB over I-78 in Somerset County, New Jersey. It was built in 1965 and reconstructed in 1995, so it is 60 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 14,871 vehicles a day, roughly 4% of them trucks, projected to reach 18,145 by 2043. The structure is 261 ft (79.6 m) long and 45 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesMartinsville RD SB
CrossesI-78
Location3.7 MI East of I-287 Jct.
RouteCounty Highway 525
CountySomerset County
StateNew Jersey
Coordinates40.64718, -74.57553
Functional classUrban Minor 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJune 2023
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 alignment8: Equal to present desirable criteria
Operating rating61 US tons
Inventory rating37 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20 + Mod
Structure length261 ft (79.6 m)
Longest span81 ft (24.7 m)
Deck width45 ft (13.7 m)
Roadway width36 ft (11 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,871 (2023)
Projected traffic18,145 by 2043
Trucks4%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway and pedestrian
CrossesHighway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$2.8 million (2023 estimate)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Martinsville RD SB over I-78 built?

It was built in 1965, making it 60 years old in 2025. It was reconstructed in 1995.

What condition is Martinsville RD SB over I-78 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 June 2023.

How much traffic does Martinsville RD SB over I-78 carry?

About 14,871 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Martinsville RD SB over I-78?

The structure is 261 ft (79.6 m) long with a longest span of 81 ft (24.7 m) and a deck 45 ft wide.

Who owns Martinsville RD SB over I-78?

It is owned by the State Highway Agency.