The Sound Shore Parkway was to begin at New York State Route 107 (NY 107) in downtown Glen Cove, running northeast into Lattingtown.

At this point, the parkway was to swing southeast toward the Village of Asharoken, where it was to run along the narrow land strip connecting Eatons Neck to the rest of Long Island on elevated fill along the sound-side of the beach.

Evidence of this can be found on the streetlights, which are designed for medians, but are used for the north side of the road and the parking fields along it instead.

[1][3] Robert Moses added this parkway to his master plan in 1965, despite retiring from the Long Island State Park Commission two years earlier.

However, by the 1970s fiscal difficulties and a political climate of rampant anti-highway sentiment thwarted all attempts at construction of the parkway, as was the case with many proposed roadways in the New York Tri-State area.