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Considerable research activity (e.g., HASTE, CAMP, ADAM projects) is currently focused on producing protocols for assessing the distraction potential of in-vehicle tasks and devices. The Lane Change Test (LCT) is a relatively simple and low cost standardized test scenario designed for measuring driver distraction. The purpose of the present study was to evaluate the LCT's ability to discriminate between different secondary tasks with different levels of workload. The LCT was used to assess the driving performance of twenty-one drivers while they performed typical navigation tasks, Point of Interest (POI) Entry and Destination Entry, each with a low and high workload version. The experimental set up included a steering wheel, foot pedals, monitor, computer and navigation system, all off the shelf. The results indicated that the LCT is a sensitive measure of driver distraction. The participants showed greater mean …