PRINCETON — The closure of Route 206 originally scheduled for last week is a go for Thursday night, according to the New Jersey Department of Transportation.

The road will close in both directions at 9 p.m. between Hillside Avenue and Arreton Road, just south of Princeton Airport in order to excavate, demolish and replace a 14-foot culvert over a branch of Stony Brook, according to a press release by the DOT.

The $1.9 million project should be complete by 6 a.m. on Nov. 21.

The DOT said that concrete was found missing from the 100-year-old culvert during an inspection in the fall of 2017. The inspection also revealed scour, or erosion inside the culvert helping to create ponding on the road.

Damage to culvert on Route 206 in Princeton (NJ DOT)

Temporary steel plates were put in and paved over while a new culvert was created.

Route 206 carries both car and truck traffic between Route 295 (the former Route 95) and the Somerville Circle.

The DOT has suggested separate detours for passenger vehicles and trucks. A longer detour is in place for trucks using Route 31 to avoid the side streets around the closure points.

Passenger Vehicle Detour:

  • Route 206 NorthFrom Route 206 North, make a right onto Ewing Street, turn left onto Mount Lucas Road and turn left onto Herrontown Road, follow to Route 206.
  • Route 206 SouthFrom Route 206 South, make a left onto Herrontown Road, turn right onto Mount Lucas Road and turn right onto Ewing Street, follow to Route 206.

Truck Detour:

  • Route 206 North
    From Route 206 North take I-295 North to Route 31 North, turn right onto County Road 518, follow to Route 206.
  • Route 206 South
    From Route 206 South, turn right onto County Road 518, turn left onto Route 31 South, and take I-295 South back to Route 206.

Contact reporter Dan Alexander at or via Twitter @DanAlexanderNJ