Wheelchair user Accessibility sign.
The main distinctions of the icon are:
A) Head position tilts forward, indicates a notion of movement in space
B) The angle of the arms and elbows indicate physical energy, effort, and represents a state of active person that advances in the world.
C) Wheels with a cut emphasize the presence of a person in complete movement.

D) The position of the legs has been move forward to provide more space for the wheels, which generates better visual clarity.
Own work using: http://www.accessibleicon.org
The Accessible Icon Project