The road begins as a four-lane expressway at a partial interchange with CR 104 in the David Allen Sarnoff Pine Barrens Preservation Area in Riverside.

[2] North of NY 25 in Aquebogue, a cloverleaf interchange was planned for the formerly proposed Long Island Expressway Extension.

[2] The at-grade interchange with CR 104 was built for one purpose; a future extension into Central Suffolk County.

From there, the road was to run west through the David A. Sarnoff Pine Barrens Preserve, then was to cross over CR 88 (Speonk–Riverhead Road), where it was to turn north as it ran along the south and west sides of the Suffolk County Community College Eastern Campus before crossing over CR 51 at Bald Hill.

The road was to turn from north back to west as it ran along Hot Water Street and Cranberry Highway, which runs through land that was owned partially by the Calverton Naval Weapons Industrial Reserve Plant.