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AIDE D4.1.6 Final Activity Report PU Contract N. IST-1-507674-IP PSA Real road Driving Simulator Real road RENAULT INRETS LEEDS TNO VTI CERTH ACC CC/SL Adaptive FCWS Active assistance Informative assistance Longitudinal control FCWS LDWS Lateral control Figure 7: overview of the learning phase experiments in WP1.2 Objectives of these experiments were to indicate the critical parameters that contribute to model architectures, to define a set of safety critical parameters that describe Short-term and Long term behavioural effects when using ADAS and IVIS systems such as AIDE, for their inclusion in the design process of the system and its interface. Different types of ADAS have been investigated: longitudinal control assistance systems (conventional cruise control/adaptive cruise control, speed limiter, intelligent speed adaptation, frontal collision warning) and lateral control assistance systems (lane departure warning). Some systems were adaptive to environment (local traffic, road coating, local speed limitations) or to driver (driver distraction, driving style). Some dual exclusive systems were integrated: either in time (simultaneous warnings) or in HMI (shared HMI, controls and display). The research first focused on the learning and familiarisation phase at the beginning of driving with driver assistance system (system’s representation, confidence, usage and short-term behavioural effects); and then on appropriation and long-term phase after a certain period of use (behavioural adaptation, user acceptance). In summary, the results showed that ADAS can change driver behaviour, but adaptation depends on the context of use (road and traffic conditions), driver attitudes (e.g. social representation of the assistance), driver characteristics (e.g. driving style, sensation seeking). The results demonstrated that adaptive and integrated HMI can contribute to ensure higher acceptance and lower intrusiveness of ADAS. 8.1.2.3.2 Discussion and self assessment: results versus objectives and state-of-the-art The experiments carried out on Long Term effects of specific driver assistance systems showed the following results: • Long-Term behavioural effects of Citroen LDWS (Lane Departure Warning System), speed limiter/conventional cruise control and Intelligent Speed Adaptation; • Specific methods to carry out the evaluation were developed. Results on Long-Term behavioural effects of Citroen LDWS (Lane Departure Warning System), speed limiter/conventional cruise control and Intelligent Speed Adaptation were taken into account to optimize the development of the next version of LDWS, speed limiter and cruise control (functionality, HMI, user manual) to favour efficient and safe learning and use and avoid any misuse/abuse of ADAS. Such results have important consequences and applications: the different methods developed for the evaluation of Long-Term effects of ADAS will be used in the internal procedure of HMI evaluation. 08/10/2008 32 VTEC
AIDE D4.1.6 Final Activity Report PU Contract N. IST-1-507674-IP Achievements of such experiments could be an important help in the design and development of safer ADAS to be implemented on board vehicle. In particular, regarding the learning and appropriation phase tests, results will be taken into account in the design and the development of future ACC and to define relevant information in the user manual to favour efficient and safe use, to optimize the development of the next version of speed limiter and cruise control (functionality, HMI, user manual) to favour efficient and safe learning and use. Results will be taken into account in the design of ADAS (e.g. warnings) adapting to different drivers’ driving style (sport like or family-like drivers). At a final glance, it is important to underline how not just such results meet the objectives of the project, but even how some of the experimental results achieved in the project went significantly beyond the State of the Art in the project’s field of activity, so providing knowledge that was not available before, as well as offering a new path to go through, in order to find new possibilities to develop driver/systems interaction, significantly improving safety and driving performances. In this sense, in particular scientific results can be considered as an important, unique and coherent framework for future studies, not available before. In particular, it has to be pointed out that such results, managing to identify the key variables and parameters required for describing and explaining behavioural effects of individual and combined ADAS and IVIS (which were the target of the project), gave a significant contribution to individuate those conditions in which a more effective use of such systems can be done, so reaching a safer and more comfortable driving. 08/10/2008 33 VTEC
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