TY - CHAP A1 - Löcken, Andreas A1 - Brunner, Pascal A1 - Kates, Ronald A1 - Riener, Andreas T1 - Impact of Hand Signals on Safety: Two Controlled Studies With Novice E-Scooter Riders T2 - Proceedings: 12th International ACM Conference on Automotive User Interfaces and Interactive Vehicular Applications UR - https://doi.org/10.1145/3409120.3410641 KW - hand signs KW - e-scooter KW - novice riders KW - turning KW - safety KW - driving experiment Y1 - 2020 UR - https://doi.org/10.1145/3409120.3410641 SN - 978-1-4503-8065-2 SP - 132 EP - 140 PB - ACM CY - New York ER - TY - JOUR A1 - Denk, Florian A1 - Fröhling, Felix A1 - Brunner, Pascal A1 - Huber, Werner A1 - Margreiter, Martin A1 - Bogenberger, Klaus A1 - Kates, Ronald T1 - Influence of gaze strategies and cognitive load on safeguarding performance of motorists in right-turning scenarios involving potential conflicts with vulnerable road users JF - Transportation Research Part F: Traffic Psychology and Behaviour N2 - In urban traffic, while the fraction of collisions involving Vulnerable Road Users (VRU) is low, their importance is high due to the higher injury risk for VRU. Their infrequent occurrence on average (compared with far more common individual perceptual and behavioral errors by both drivers and VRUs) reflects an underlying fault tolerance in traffic processes. However, the degree of fault tolerance varies among traffic situations. The underlying perceptual and cognitive processes involved are complex and can require a high level of attention and concentration, particularly in situations with intersecting trajectories. These processes can occasionally fail, leading to collision risk. The situation of right-turning motorists (in right-hand-drive countries) encountering cyclists moving straight on a bike lane (with right of way) has a particularly low error tolerance, since motorists must actively scan for cyclists approaching from behind. In order to develop, test and assess solutions that mitigate collision risk in this situation, the behavior-related causation mechanisms need investigation. This is the focus of this article. We conducted a trial on our closed test track with n = 35 subjects. The experiment was designed as a within-subject design with three independent factors: maneuver, target velocity, and cognitive load in an n-back task. The trial included observations of participants' gaze control. A primary research focus was the quality and efficiency of the safeguarding gaze behavior of participants in order to draw conclusions on the causation mechanisms of collisions in this situation. For this purpose we define metrics in order to quantify the quality and efficiency of a specific gaze behavior. Furthermore, we studied the effect of factors cognitive load and target velocity on safety and secondary (n-back) task performance. Remarkably, only four out of 35 participants reached a collision risk of 0% relating to the defined quality metric. Furthermore, we identified four distinct gaze strategy groups through hierarchical clustering, where one group performed particularly few glances overall. This group showed significant differences with respect to the defined quality metric whereas the other groups showed only slight differences to each other. The results have implications on subsequent crash causation model development. UR - https://doi.org/10.1016/j.trf.2024.11.012 Y1 - 2024 UR - https://doi.org/10.1016/j.trf.2024.11.012 UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:573-63967 SN - 1873-5517 VL - 2025 IS - 109 SP - 32 EP - 49 PB - Elsevier CY - Amsterdam ER - TY - CHAP A1 - Brunner, Pascal A1 - Denk, Florian A1 - Huber, Werner A1 - Kates, Ronald T1 - Virtual safety performance assessment for automated driving in complex urban traffic scenarios T2 - 2019 IEEE Intelligent Transportation Systems Conference (ITSC) UR - https://doi.org/10.1109/ITSC.2019.8917517 Y1 - 2019 UR - https://doi.org/10.1109/ITSC.2019.8917517 SN - 978-1-5386-7024-8 SP - 679 EP - 685 PB - IEEE CY - Piscataway ER - TY - CHAP A1 - Denk, Florian A1 - Fröhling, Felix A1 - Brunner, Pascal A1 - Huber, Werner A1 - Margreiter, Martin A1 - Bogenberger, Klaus A1 - Kates, Ronald T1 - Design of an Experiment to Pinpoint Cognitive Failure Processes in the Interaction of Motorists and Vulnerable Road Users T2 - IEEE IV 2023: Symposium Proceedings UR - https://doi.org/10.1109/IV55152.2023.10186550 KW - Traffic analysis KW - human factors KW - cognitive models KW - experimental design Y1 - 2023 UR - https://doi.org/10.1109/IV55152.2023.10186550 SN - 979-8-3503-4691-6 PB - IEEE CY - Piscataway ER - TY - CHAP A1 - Denk, Florian A1 - Himmels, Chantal A1 - Andreev, Vladislav A1 - Lindner, Johannes A1 - Syed, Arslan Ali A1 - Riener, Andreas A1 - Huber, Werner A1 - Kates, Ronald T1 - Studying Interactions of Motorists and Vulnerable Road Users: Empirical Comparison of Test Track and Simulator Experiments T2 - 2023 IEEE 26th International Conference on Intelligent Transportation Systems (ITSC) UR - https://doi.org/10.1109/ITSC57777.2023.10421865 Y1 - 2024 UR - https://doi.org/10.1109/ITSC57777.2023.10421865 SN - 979-8-3503-9946-2 SP - 992 EP - 999 PB - IEEE CY - Piscataway ER - TY - CHAP A1 - Denk, Florian A1 - Brunner, Pascal A1 - Huber, Werner A1 - Margreiter, Martin A1 - Bogenberger, Klaus A1 - Kates, Ronald T1 - Assessment of traffic safety interventions using virtual randomized controlled trials: potential of connected and automated driving including V2X for collision reduction at urban intersections T2 - 2022 IEEE 25th International Conference on Intelligent Transportation Systems (ITSC) UR - https://doi.org/10.1109/ITSC55140.2022.9921764 KW - Laser radar KW - Simulation KW - Roads KW - Redundancy KW - Stochastic processes KW - Data integration KW - Predictive models Y1 - 2022 UR - https://doi.org/10.1109/ITSC55140.2022.9921764 SN - 978-1-6654-6880-0 SP - 1183 EP - 1190 PB - IEEE CY - Piscataway ER - TY - CHAP A1 - Brunner, Pascal A1 - Löcken, Andreas A1 - Denk, Florian A1 - Kates, Ronald A1 - Huber, Werner T1 - Analysis of experimental data on dynamics and behavior of e-scooter riders and applications to the impact of automated driving functions on urban road safety T2 - 2020 IEEE Intelligent Vehicles Symposium (IV) UR - https://doi.org/10.1109/IV47402.2020.9304835 KW - Safety KW - Accidents KW - Vehicle dynamics KW - Testing KW - Stability analysis KW - Motorcycles KW - Biological system modeling Y1 - 2021 UR - https://doi.org/10.1109/IV47402.2020.9304835 SN - 978-1-7281-6673-5 SP - 219 EP - 225 PB - IEEE CY - Piscataway ER - TY - CHAP A1 - Denk, Florian A1 - Huber, Werner A1 - Brunner, Pascal A1 - Kates, Ronald T1 - The role of perceptual failure and degrading processes in urban traffic accidents: a stochastic computational model for virtual experiments T2 - 2020 IEEE 23rd International Conference on Intelligent Transportation Systems (ITSC) UR - https://doi.org/10.1109/ITSC45102.2020.9294498 KW - accidents KW - vehicles KW - safety KW - roads KW - computational modeling KW - stochastic processes KW - information processing Y1 - 2020 UR - https://doi.org/10.1109/ITSC45102.2020.9294498 SN - 978-1-7281-4149-7 PB - IEEE CY - Piscataway ER -