16. The system of claim 15 , wherein the familiarity data indicates that the driver is familiar with the vehicle operation, the sensor data indicates that the driver is not familiar with the vehicle operation, and the estimating step includes determining that the driver is not familiar with the vehicle operation based on the sensor data.
15. The system of claim 1 , wherein the estimating step includes estimating how familiar the driver is with the vehicle operation based on familiarity data describing how familiar the driver is with the vehicle operation based on a past experience of the driver with the vehicle operation.