What is Perpendicular, Parallel, incline/decline and ad hoc Parking?

I need an indepth defenition of what Perpendicular Parking is… what Parallel parking is…. what incline/decline parking is… and what ad hoc parking is…

Perpendicular is just another word for the normal angle parking.

Parallel is that, backing into a space between two parked cars lined up with the curb. See http://tazewell.k12.il.us/washingtonhs/departments/drivers_ed/DELessons/ParallelParking.htm

Incline is up hill parking, and decline is down hill parking. Up hill you would turn your wheels away from the curb so the curb would stop you if you happened to roll, down hill toward for the same reason.

“Ad hoc” merely means for the situation at hand, so I have no idea what they would mean by ad hoc parking.

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