A stretch of Interstate 80 in Morris County, New Jersey, that’s been plagued by sinkholes in recent months will be closed for at least “several weeks,” an official said, as crews investigate up to 90 “voids” lurking below the surface.

The eastbound lanes of Route 80 are expected to remain closed for at least another three weeks to get to the root cause of two sinkholes that have opened up in the past two months.

I-80 Eastbound is closed for emergency sinkhole repairs in Wharton, Morris County, the New Jersey Department of Transportation said.

A section of I-80 in Morris County is expected to remain closed for several weeks due to emergency sinkhole repairs, the New Jersey Department of Transportation says.