A method for operating a self-propelled mobile platform includes reducing a speed of the mobile platform as a function of a distance between the mobile platform and obstacles situated along a travel route of the mobile platform. The mobile platform includes at least one first sensor configured to detect obstacles in surroundings of the mobile platform.

A work vehicle includes a travelling state determination unit capable of determining a travelling state of a travelling body, and a control unit that restricts, if it has been determined by the travelling state determination unit that the travelling body is in a reverse travelling state, an upper limit value of a target rotational speed of an engine that is based on an operation on an accelerator operation tool to be a lower value than in a case where it has been determined by the travelling state determination unit that the travelling body is in a forward travelling state.

Mobile devices described herein relate to assisting users. In one embodiment, a mobile device for assisting a user is disclosed. The mobile device includes a motor, one or more sensors, a processor, and a memory communicably coupled to the processor and including instructions that, when executed by the processor, cause the processor to determine, using sensor data from the one or more sensors, a signature of the user that is operating the mobile device, the signature indicating at least attributes about movement of the user. The instructions include instructions to responsive to determining that the signature satisfies a trigger, adjust a speed of the mobile device by controlling the motor.