ACCIDENT; STILL BEING CLEARED;  NOTE: THERE WERE SEVERAL ACCIDENTS AT THIS LOCATION   ONE ACCIDENT LEFT ;   N B SLOW EXIT 8  RT 287 TARRYTOWN  TO THE TAPPAN ZEE, EXIT 10  ROUTE 9W NYACK  TO EXIT 13  PALISADES PKWY NANUET , AND AT EXIT 16  ROUTE 17 HARRIMAN .