US Bridges

Hillsborough Rd. over Trenton Line (csxt)

Good

Somerset County, New Jersey · 0.4 MI E of Rt 206. · Structure no. 1850163

Built
1917
108 years old, rebuilt 2012
Condition
Good
inspected September 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
74 ft
1 main span
Daily traffic
1,490
2022 count
Owner
Unknown
Unknown

About this bridge

Hillsborough Rd. over Trenton Line (csxt) is a prestressed concrete box beam or girders - multiple carrying Hillsborough Rd. over Trenton Line (csxt) in Somerset County, New Jersey. It was built in 1917 and reconstructed in 2012, so it is 108 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 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 1,490 vehicles a day, roughly 3% of them trucks, projected to reach 1,820 by 2042. The structure is 74 ft (22.6 m) long and 31 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesHillsborough Rd.
CrossesTrenton Line (csxt)
Location0.4 MI E of Rt 206.
RouteCity Street 0
Coordinates40.48126, -74.64736
Functional classUrban Collector

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 inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment6: Equal to present minimum criteria
Operating rating90.4 US tons
Inventory rating72.5 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length74 ft (22.6 m)
Longest span69 ft (21 m)
Deck width31 ft (9.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,490 (2022)
Projected traffic1,820 by 2042
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerUnknown
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 Hillsborough Rd. over Trenton Line (csxt) built?

It was built in 1917, making it 108 years old in 2025. It was reconstructed in 2012.

What condition is Hillsborough Rd. over Trenton Line (csxt) 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 September 2024.

How much traffic does Hillsborough Rd. over Trenton Line (csxt) carry?

About 1,490 vehicles per day (2022 count), of which roughly 3% are trucks.

How long is Hillsborough Rd. over Trenton Line (csxt)?

The structure is 74 ft (22.6 m) long with a longest span of 69 ft (21 m) and a deck 31 ft wide.

Who owns Hillsborough Rd. over Trenton Line (csxt)?

It is owned by the Unknown and maintained by the State Highway Agency.