The incident is happening in Rockland County on I-87 southbound near Nyack at the South Broadway overpass.
According to New York State Police, the truck has been removed, but currently, repairs are being made to the bridge which could take hours. The left three lanes of traffic are closed.
Drivers are asked to avoid the area if possible.
This continues to be a developing story. Check back to Daily Voice for updates.
Click here to follow Daily Voice New City and receive free news updates.