An accident closed all lanes of the northbound Sunken Meadow Parkway between Route 25 and Pulaski Road for about 20 minutes late Monday morning, according to state officials.
The closure affected a section of road in Commack, as well as on the East Northport-Kings Park border.
The road was closed at 11:28 a.m., according to the state Department of Transportation website, informny.com.
The website reported the road reopened at 11:50 a.m.
It was not immediately clear how many vehicles were involved in the accident or whether there were injuries.