behind the wheel

:  in the place or situation that is being or has been departed from

:  in, to, or toward the back

:  later in time

:  in or to a place or situation in back of or to the rear of

: used as a function word to indicate something that screens an observer

:  following in order

:  buttocks

:  a circular frame of hard material that may be solid, partly solid, or spoked and that is capable of turning on an axle

:  a contrivance or apparatus having as its principal part a wheel: such as

:  a chiefly medieval instrument of torture designed for mutilating a victim (as by stretching or disjointing)

:  to turn on or as if on an axis :  revolve

:  to change direction as if revolving on a pivot

:  to move or extend in a circle or curve