WORK VEHICLE

A self-driving work vehicle, including: a traveling apparatus (1, 2); a vehicle body supported by the traveling apparatus on ground; a variable traveling power supply apparatus (PSU) configured to supply rotational drive power to the traveling apparatus; a travel operation interface (12) configured to adjust a rate of the rotational drive power; a parking brake (21) provided for a transmission shaft of the variable traveling power supply apparatus (PSU); a rotation detector (63) configured to detect rotation of the traveling apparatus or the transmission shaft; and a controller (50) configured or programmed to: control the parking brake (21) to a braking state or a non-braking state by a parking brake control module (52); manage the braking state or the non-braking state as a vehicle body state by a condition management module (53), the braking state and the non-braking state being operating states of the parking brake (21); and based on the vehicle body state and a result of the detection by the rotation detector (63), determine that the parking brake (21) is in an abnormal state, by a brake abnormality determination module (54), in response to the rotation detector (63) detecting the rotation while the parking brake (21) is in the braking state.