METHOD OF CONTROLLING A HEAVY-DUTY VEHICLE IN A SLOPE

The invention relates to a method of controlling a heavy-duty vehicle in a slope, which vehicle has come to a standstill due to service brakes of the vehicle having applied a service brake force, the method comprising: determining a total brake force required for maintaining the vehicle at standstill; activating at least one park brake for providing a park brake force; gradually increasing the park brake force; and while the park brake force is gradually increased, gradually reducing the service brake force while maintaining the sum of the service brake force and the park brake force at least equal to the determined total brake force.