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The route begins at its eastern terminus and heads northeast before curving westward in East Point. It continues west until Cable Head, where it curves south before ending at its western terminus.
Route 16A, also known as Elmira Road, is a four-kilometre (2.5 mi), two-lane, uncontrolled-access, secondary highway in eastern Prince Edward Island. Its southern terminus is at Route 16 in South Lake and its northern terminus is at Route 16 in North Lake. It is a suffixed highway of Route 16 and is located completely in Kings County.