Working vehicle having a braking system, comprising - a motor, of which the rotational speed can be varied via an accelerator pedal; - a parking brake device having at least one spring-loaded brake; - a brake controller for actuating the parking brake device; and comprising - a locking brake circuit having brake lines, via which brake fluid under brake pressure is supplied to the parking brake device in order to release the parking brake device; wherein - the brake controller is configured to automatically activate the parking brake device if at least one of the following conditions is met: - the accelerator pedal is not actuated over a predetermined period of inactivity and a travel speed of the working vehicle is below a specified speed limit value; - a travel direction switch is placed in a "neutral" position and the travel speed is below a specified speed limit value; - the travel speed is zero and subsequently increases without the accelerator pedal being actuated; - the travel speed is zero and a service brake is activated by a driver; - the travel speed is zero and an absence of the driver from a driver's seat can be established, characterised in that a throttle point is provided in a supply between the spring-loaded brake and the brake lines in order to prevent a rapid pressure drop in the locking brake circuit and thus an abrupt braking procedure when the parking brake device is activated. - a motor, of which the rotational speed can be varied via an accelerator pedal; - a parking brake device having at least one spring-loaded brake; - a brake controller for actuating the parking brake device; - a locking brake circuit having brake lines, via which brake fluid under brake pressure is supplied to the parking brake device in order to release the parking brake device; - the brake controller is configured to automatically activate the parking brake device if at least one of the following conditions is met: - the accelerator pedal is not actuated over a predetermined period of inactivity and a travel speed of the working vehicle is below a specified speed limit value; - a travel direction switch is placed in a "neutral" position and the travel speed is below a specified speed limit value; - the travel speed is zero and subsequently increases without the accelerator pedal being actuated; - the travel speed is zero and a service brake is activated by a driver; - the travel speed is zero and an absence of the driver from a driver's seat can be established, characterised in that a throttle point is provided in a supply between the spring-loaded brake and the brake lines in order to prevent a rapid pressure drop in the locking brake circuit and thus an abrupt braking procedure when the parking brake device is activated. - the accelerator pedal is not actuated over a predetermined period of inactivity and a travel speed of the working vehicle is below a specified speed limit value; - a travel direction switch is placed in a "neutral" position and the travel speed is below a specified speed limit value; - the travel speed is zero and subsequently increases without the accelerator pedal being actuated; - the travel speed is zero and a service brake is activated by a driver; - the travel speed is zero and an absence of the driver from a driver's seat can be established,