Control system for work vehicle, method, and work vehicle

A method executed by a controller in order to control a work vehicle including a work implement, the method comprising:

• determining a work zone at a work site;
• determining a target design topography at least partially positioned below an actual topography at the work site;
• specifying a non-work zone that is a portion in which the actual topography is positioned below the target design topography in the work zone;
• modifying the work zone based on the non-work zone;
• generating a first command signal to operate the work implement according to the modified work zone and the target design topography;
• and
• controlling the work implement in accordance with the first command signal.

A work vehicle comprising:

• a work implement;
• and
• a controller configured to control the work implement,
• the controller being configured to
• determine a work zone at a work site,
• determine a target design topography at least partially positioned below an actual topography at the work site,
• specify a non-work zone that is a portion in which the actual topography is positioned below the target design topography in the work zone,
• modify the work zone based on the non-work zone,
• generate a command signal to operate the work implement according to the modified work zone and the target design topography, and
• control the work implement in accordance with the first command signal.