UPDATE: The accident has been cleared.
Drivers planning to hit the West Side Highway to leave town ahead of the holiday weekend should find other routes, as it's heavily backed up during the Friday evening rush.
Five cars became snarled in an accident on the northbound side of the highway at 4:15 p.m., near 106th Street. The left and center lanes are blocked as a result, and traffic is backed up all the way into the 70s.
Stay with NBC 4 New York for updates.