US Bridges

US Route 1 over I-287 & Mill Brook Br.

Fair

Middlesex County, New Jersey · At Rt 1 & Rt 287 Jct. · Structure no. 1203155

Built
1962
63 years old
Condition
Fair
inspected May 2023
Type
Culvert
Concrete
Length
23 ft
1 main span
Daily traffic
90,720
2023 count
Owner
State
State Highway Agency

About this bridge

US Route 1 over I-287 & Mill Brook Br. is a concrete culvert carrying US Route 1 over I-287 & Mill Brook Br. in Middlesex County, New Jersey. It was built in 1962, so it is 63 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 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 90,720 vehicles a day, roughly 4% of them trucks, projected to reach 108,864 by 2043. The structure is 23 ft (7 m) long and 212 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesUS Route 1
CrossesI-287 & Mill Brook Br.
LocationAt Rt 1 & Rt 287 Jct.
RouteU.S. Route 1
CountyMiddlesex County
StateNew Jersey
Coordinates40.52869, -74.35422
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
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53 US tons
Inventory rating32 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length23 ft (7 m)
Longest span23 ft (7 m)
Deck width212 ft (64.6 m)
Roadway width106 ft (32.3 m)
Vertical clearance over deck15 ft (4.6 m)

Traffic and service

Average daily traffic90,720 (2023)
Projected traffic108,864 by 2043
Trucks4%
Lanes on structure8
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was US Route 1 over I-287 & Mill Brook Br. built?

It was built in 1962, making it 63 years old in 2025.

What condition is US Route 1 over I-287 & Mill Brook Br. 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 2023.

How much traffic does US Route 1 over I-287 & Mill Brook Br. carry?

About 90,720 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is US Route 1 over I-287 & Mill Brook Br.?

The structure is 23 ft (7 m) long with a longest span of 23 ft (7 m) and a deck 212 ft wide.

Who owns US Route 1 over I-287 & Mill Brook Br.?

It is owned by the State Highway Agency.