ROAD CLOSED; SEEK ALTERNATE; INVOLVING A PEDESTRIAN; TRAFFIC BEING DIVERTED OFF AT EXIT 19 PENINSULA BLVD .DELAYS BACK TO EXIT 21 NASSAU RD  ALT: SUNRISE HWY   EASTBOUND ACCIDENT BEFORE EXIT 18 EAGLE AVE  ON THE LEFT LANE   SHOULDER.DELAYS BACK TO EXIT 17 HEMPSTEAD AVE .