ISLANDIA, N.Y. — The tipoff was the sunglasses.

A New Yorker faces a $135 traffic fine for using a mannequin as her plus-one in the high-occupancy lane of the Long Island Expressway.

An alert sheriff’s deputy on Long Island became suspicious when he saw the “passenger” wearing sunglasses and using the visor. The only problem: The sky was overcast.

When he stopped the vehicle, he found the mannequin, fully dressed with a long dark wig, blazer, shirt and scarf.

The 61-year-old driver left with a summons.