At the intersection with the southern terminus of CR 3 (South Wellwood Avenue), the name flips to East Montauk Highway as NY 27A continues northeast through Lindenhurst. At Park Avenue, the route passes south of a long strip mall along the north side of the roadway, crossing into the village of Babylon.
The intersection of CR 3 (South Wellwood Avenue) and NY 27A changes names to East Montauk Highway as NY 27A continues northeast through Lindenhurst.  At Park Avenue, the route passes south of a large shopping center located on the north side of the road before entering Babylon village.