Skip to main content Skip to main navigation


Task-Driven System Exploration Enhances Subsequent Instruction Effects: Testing the Applied simTD Vehicle-to-x Human Machine Interface

Angela Mahr; Frank Mast
In: ICTTP International Conference on Traffic and Transport Psychology - Abstract Book. ICTTP International Conference on Traffic and Transport Psychology (ICTTP-12), 5th, August 29-31, Groningen, Netherlands, Pages 98-98, Grafimedia, 2012.


The simTD project is shaping tomorrow’s safe and intelligent mobility through testing vehicle-to-x communication and its applications. Before applying this new system in a large-scale test field, we measured the influence of drivers’ interaction with the human machine interface on their driving performance in a safe driving simulation setup. Therefore, we applied the Lane Change Test methodology and additionally measured visual distraction from the driving task to the simTD display by recording participants’ eye gazes. Two questions of highly practical relevance should be addressed: First, we wanted to check, whether our HMI fulfills two visual distraction criteria of the Alliance of Automobile Manufacturer’s „Statement of Principles, Criteria and Verification Procedures on Driven Interactions with Advanced In-Vehicle Information and Communication Systems”. Second, we investigated, whether an HMI instruction improves task or driving performance. Results show that even without prior system exploration or instruction, average glance duration meets the AAM criterion and is significantly shorter than two seconds. The total glance time to perform a task was shorter than 20 seconds only after participants made some basic experiences with the system. The results imply that instructions could improve participants’ performance, and are even more effective after participants explore the system themselves.