Nowadays, personal navigation devices (PNDs) that provide GPSbased directions are widespread in vehicles. These devices typically display the real-time location of the vehicle on a map and play spoken prompts when drivers need to turn. While such devices are less distracting than paper directions, their graphical display may distract users from their primary task of driving. In experiments conducted with a high fidelity driving simulator, we found that drivers using a navigation system with a graphical display indeed spent less time looking at the road compared to those using a navigation system with spoken directions only. Furthermore, glancing at the display was correlated with higher variance in driving performance measures. We discuss the implications of these findings on PND design for vehicles. Categories and Subject Descriptors H5.2. User Interfaces: Evaluation/methodology. General Terms Measurement, Design, Reliability, Experimentation, Human Factors. Keywords In-car navigatio...
Andrew L. Kun, Tim Paek, Zeljko Medenica, Nemanja