Moving Backwards

[MGoelz]

CROSSING: The act of a TRACKBALL or ROBOT passing through the plane defined by a line (i.e. LANE MARKER or FINISH LINE) when it is projected vertically upwards. A TRACKBALL or ROBOT shall have CROSSED a line when all parts of the object, while traveling in a counterclockwise direction, have completely passed through the plane.

<G22> Direction Of Traffic – ROBOTS must proceed around the TRACK in a counter-clockwise direction. Once a ROBOT has CROSSED a LANE MARKER or FINISH LINE, it shall not break the plane of the line by moving in the clockwise direction. A PENALTY will be assigned for each infraction.

Based on rule <G22> and the definition of Crossing, there is nothing wrong with moving anywhere within a quadrant, as long as you don't break the plane of the lane divider lines or finish lines.
If you cross back a 10 point penalty will be applied, and if you start to cross the next line (moving counter-clockwise), then you probably want to keep going so no penalty can be applied.

I haven't found a rule against moving freely in a quadrant, providing you don't break the planes dictated by the lines.