The project's objective was to develop and test rules and concepts of HMI for multiple active safety systems where the driver will react and respond in an appropriate way to avoid the threat or threats in the specific situation. Three different safety systems were used in the project: a forward collision warning system, a lane departure warning system and a distraction warning system.
Tests with 74 drivers were done in a driving simulator (VTI's Sim III) on a double-lane motorway with a speed limit of 110 km/h. The drivers were informed that the vehicle they drove was equipped with the three active safety systems. A secondary task (Surrogate In Vehicle Information System, S-IVIS) was used to visually distract the driver from looking at the road.
In the scenarios and for the systems tested in this study, warnings did produce appropriate driver responses. This means braking for collision warning, steering for lane departure warning and looking back to the road for distraction warning, also when the warnings occurred simultaneously. There was no evidence found that "Warning Management" influences the drivers‟ reaction and response compared to "No Management" in this setup (no effect by issuing higher priority warnings earlier instead of a lower priority warning and no effect by issuing one warning instead of several). A possible explanation of the driver behaviour could be that drivers react on the warning by looking back to the road, but respond based on their own assessment of the scenario (and not on the interpretation of the warning).
Dukic, T. (2009). Driver Warnings In Time and Safety critical situations. DiWiTSAState of Art. Issue 1. Restricted report. Linköping, Sweden: VTI.
Dukic, T. (2009). Warning management for active safety systems. Restricted report. Linköping, Sweden: VTI.
Dukic, T. & Nilsson, L. (under writing). Warning management for active safety systems. To be submitted to an international journal. Linköping, Sweden: VTI.