Method and system for estimating a driver's intention

An intention estimation (1) and operation assistance system for estimating an operator's intention (60) and providing assistance to operation of a machine. Reference data, such as the operation of a plurality of hypothetical operators (40), is provided for comparison with the operation of a real operator (30), to determine an estimated intention of the operator. The estimated operator is utilized to alter the operation of the machine, to provide a safer and/or smoother operation experience in operating the machine.