WEEHAWKEN - An overturned tractor-trailer caused heavy delays for the morning commute on the Lincoln Tunnel helix.

Authorities say the crash happened on westbound NJ-495. The roadway was closed for much of the morning while crews work to clear the crash. Westbound traffic was diverted to Hoboken.

The roadway was reopened to traffic late Wednesday morning.

Police have not yet said if there were any injuries in the crash. The cause remains under investigation.