Autonomous travel method, autonomous travel system, and autonomous travel program

An autonomous travel system comprising:

• a traveling processor configured to cause a work vehicle to perform an autonomous travel following a target route including a turning route in a work area;
• an acquisition processor configured to acquire a distance from a reference point of the turning route to an edge of the work area;
• and
• a setting processor configured to set a vehicle speed of the work vehicle on a first turning route where the distance from the reference point to the edge of the work area is less than or equal to a predetermined distance to a predetermined speed which is less than a vehicle speed of the work vehicle on a second turning route where the distance from the reference point to the edge of the work area is greater than the predetermined distance.

An autonomous travel program to cause one or more processors to procedures perform operations comprising:

• causing a work vehicle to perform an autonomous travel following a target route including a turning route in a work area;
• acquiring a distance from a reference point of the turning route to an edge of the work area;
• and
• setting a vehicle speed of the work vehicle on a first turning route where the distance from the reference point to the edge of the work area is less than or equal to a predetermined distance to a predetermined speed which is less than a vehicle speed of the work vehicle on a second turning route where the distance from the reference point to the edge of the work area is greater than the predetermined distance.