The creative use of random shit to make your passenger seat looks
like there's a person in it so you can ride in the HOV
lane without getting pulled over.
One may use blow up dolls, luggage, bedding, or simply a shirt on the seat and a hat on the headrest to achieve this deception.
My HOV seat is created using a large T-shirt around the seat with a
pillow tucked under it and a ball cap on the headrest. For
extra effect, I slide the seat all the way forward. Works
like a charm.