The system has a microprocessor provided in a driver workload estimator (110) for monitoring driver interaction with a vehicle device through input buttons (105a-105n), for storing driver workload (DW) values for each of the input buttons and for summing the DW values of the individual buttons that are pressed to obtain the estimated DW. The estimator estimates the driver workload based on the driver interaction. Independent claims are also included for the following: (1) a method for real-time assessment of driver workload based on driver interaction with a vehicle device (2) a vehicle device capable of real-time assessment of driver workload based on driver interaction, comprising buttons.
Driver workload assessment system for use by e.g. vehicle navigation device, has microprocessor monitoring driver interaction with device via input buttons, and estimator estimating driver workload based on driver interaction