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Sökning: WFRF:(Kaufmann Clemens) > Johnsson Carl

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1.
  • Várhelyi, András, et al. (författare)
  • Driving with and without automation on the motorway–an observational study
  • 2021
  • Ingår i: Journal of Intelligent Transportation Systems: Technology, Planning, and Operations. - : Informa UK Limited. - 1547-2450. ; 25:6, s. 587-608
  • Tidskriftsartikel (refereegranskat)abstract
    • User-related assessment of a level 3 automated driving system, providing functions such as lane- and distance-keeping, stop & go driving, lane change and overtaking, was carried out on a motorway in Germany with the aim to assess user-related issues of automated driving, i.e., behavior when driving with automation on motorways, user experiences, reactions and acceptance. Twenty-one persons drove twice along the test route once with the system switched off and once with the system active. Driving data were logged and driving behavior was observed by two observers in the car and the drivers answered questionnaires. The results revealed that the drivers used the system as it was intended to be used and that the system affected driving positively in several ways, resulting in better speed adaptation, less speed variation, better distance keeping, better lane choice, better indicator usage and fewer dangerous lane changes. No differences with regard to subjective workload were shown. The system was perceived as being both useful and satisfactory. However, it was found that the system did not react to other drivers’ intention to make a lane change, especially in situations where they were attempting to merge onto the motorway. Further development is needed to improve the system’s ability to recognize other vehicles’ intention to enter the vehicle’s own lane. Also, the phenomenon of the driver “feeling guilty” because of the system’s reckless behavior by not allowing other drivers to merge onto the motorway or hindering other cars behind due to lengthy overtaking should be investigated further.
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2.
  • Varhelyi, Andras, et al. (författare)
  • User-related Assessment of the Highway Automation System of VW
  • 2017
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • The aim of the user-related assessment was to evaluate the effects on driver behaviour, experiences, reactions, expected effects and acceptance of the Highway Automation” system, developed by VW in sub-project 6 of the AdaptIVe IP. The driving functions were developed as level 3 (conditional automation) functions so the driver does not have to monitor the system while driving. The system provides the following driving functions: following lane and lead vehicle, stop & go driving, lane change and overtaking.Twenty seven persons (12 males and 15 females) drove twice along the test route of approximately 95 km motorway sections, once with the system switched off and once with the system switched on. The order of driving was balanced in such a way that every other subject drove first with the system switched off and then with the system switched on. For the following subject, the order of driving was reversed. During the test rides, driving data was logged and driving behaviour was observed by two observers in the car. After the first drive, the drivers answered a short workload questionnaire and after the second drive, a more comprehensive questionnaire was filled out. The questionnaire covered issues, such as subjective workload, understanding the system, trust, usability, usefulness, satisfaction, HMI issues, experienced effects, expected benefits, expected usage, and willingness to pay.The results showed that the drivers used the system as intended. The system was used in almost all situations when it offered to drive automatically, nevertheless, some situations were observed in which the driver took over from the system because he/she got impatient with the system (e.g. long overtaking process, early preparation for exiting the motorway), or he/she or the safety driver had to react in a critical situation. Basically, the drivers did not interfere with the system settings. Only in situations in which the system did not recognise the change of the speed limit (variable overhead signs) they had to manually adapt to the speed limit.The system received both positive and negative comments. On the positive side, correct driving with regard to distance and speed, enhanced comfort and possible time “earnings” were mentioned. On the negative side, the participants took up the system failures (not or wrongly recognised vehicles, traffic signs or road markings), the reckless behaviour of the system (not letting others to merge to the motorway), problems while overtaking due to the system limitation to 130 km/h. Also, due to these issues some test persons felt more stressed while driving with the system. For some, this was okay, for others the system could have driven faster (especially in some situations where a higher acceleration would have been an advantage). Also, the setting that the system was driving 10 km/h over the actual speed limit was commented in both ways. For some participants, this was totally fine, while others did not agree with this setting and were wondering why it was sat in that way.
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  • Resultat 1-2 av 2
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Varhelyi, Andras (2)
Almqvist, Sverker (2)
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