This paper presents a method to reduce the number of warnings in situations where two or more warnings at the same time can occur. The results of an experiment with 36 test persons using a driving-simulator are also presented. In that experiment two ways to display warnings have been compared: a standard warning method, which directly displayed warnings to the driver and a method, which is based on coordinated warnings and is emitting a smaller number of warnings in the same driving situation. Results show that warning-coordination reduces the number of collisions and improves driver's reaction time in such a way that a driver reacts 114 ms earlier (in the average) than by using standard warnings. As an outcome of coordinated warnings the test drivers showed a tendency to drive more carefully. The experiment also shows that drivers prefer the method of warning-coordination over the conventional method to display warnings. For the covering abstract see ITRD E134653.
Samenvatting