TY - JOUR A1 - von Sawitzky, Tamara A1 - Grauschopf, Thomas A1 - Riener, Andreas T1 - “Attention! A Door Could Open.”—Introducing Awareness Messages for Cyclists to Safely Evade Potential Hazards JF - Multimodal Technologies and Interaction N2 - Numerous statistics show that cyclists are often involved in road traffic accidents, often with serious outcomes. One potential hazard of cycling, especially in cities, is “dooring”—passing parked vehicles that still have occupants inside. These occupants could open the vehicle door unexpectedly in the cyclist’s path—requiring a quick evasive response by the cyclist to avoid a collision. Dooring can be very poorly anticipated; as a possible solution, we propose in this work a system that notifies the cyclist of opening doors based on a networked intelligent transportation infrastructure. In a user study with a bicycle simulator (N = 24), we examined the effects of three user interface designs compared to a baseline (no notifications) on cycling behavior (speed and lateral position), perceived safety, and ease of use. Awareness messages (either visual message, visual message + auditory icon, or visual + voice message) were displayed on a smart bicycle helmet at different times before passing a parked, still-occupied vehicle. Our participants found the notifications of potential hazards very easy to understand and appealing and felt that the alerts could help them navigate traffic more safely. Those concepts that (additionally) used auditory icons or voice messages were preferred. In addition, the lateral distance increased significantly when a potentially opening door was indicated. In these situations, cyclists were able to safely pass the parked vehicle without braking. In summary, we are convinced that notification systems, such as the one presented here, are an important component for increasing road safety, especially for vulnerable road users. UR - https://doi.org/10.3390/mti6010003 KW - accident prevention KW - awareness message KW - connected traffic KW - cycling KW - head-mounted display KW - lateral position KW - simulation KW - vulnerable road users Y1 - 2021 UR - https://doi.org/10.3390/mti6010003 UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:573-13079 SN - 2414-4088 VL - 6 IS - 1 PB - MDPI CY - Basel ER - TY - JOUR A1 - von Sawitzky, Tamara A1 - Löcken, Andreas A1 - Grauschopf, Thomas A1 - Riener, Andreas T1 - Enhancing cyclist safety in cyclist-vehicle interactions through early hazard notifications: a comparison of bi-modal cues at head level JF - Traffic Safety Research N2 - Cyclists frequently face numerous hazards on the road. Often those hazards are posed by motorised vehicles. Advanced support systems that alert cyclists to potential dangers could enhance their safety. However, research in this area, particularly regarding hazard notifications for cyclists, remains sparse. This work assesses bi-modal early hazard notification concepts (combining visual cues with either auditory or tactile feedback) provided at head level (smart glasses with speakers, tactile headband). They are detailing the nature of the hazard, its direction relative to the cyclist, and the timing of exposure. This work investigates cyclists' preference and perception of the proposed concepts for two hazardous situations originating from interactions with vehicles: ‘dooring’, the hazard of a potential collision with an opening door of a parked vehicle (evaluated through a test track study, N = 32) and ‘being overtaken’ which poses the hazard of being cut off or hit by the overtaking vehicle (assessed in a bicycle simulator study, N = 21). The study involved comparisons of supported and unsupported rides, focusing on their impact on usability, intuitiveness, workload, and perceived safety. Our findings reveal varied preferences for the supporting feedback modality, with 56% favouring visual-auditory and 31% visual-tactile. The participants rated user experience, intuitiveness and perceived safety for the use of both concepts quite high. Further, the workload for assisted rides was rated as equally low as for unassisted rides. UR - https://doi.org/10.55329/bodb6366 Y1 - 2024 UR - https://doi.org/10.55329/bodb6366 UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:573-56562 SN - 2004-3082 VL - 7 PB - Lund University CY - Lund ER - TY - CHAP A1 - von Sawitzky, Tamara A1 - Grauschopf, Thomas A1 - Riener, Andreas T1 - A Flexible Simulation Environment for Enhanced VRU Research: Use Case of Hazard Notifications for Cyclists T2 - 15th International ACM Conference on Automotive User Interfaces: Adjunct Conference Proceedings UR - https://doi.org/10.1145/3581961.3609849 Y1 - 2023 UR - https://doi.org/10.1145/3581961.3609849 SN - 979-8-4007-0112-2 SP - 283 EP - 286 PB - ACM CY - New York ER - TY - CHAP A1 - von Sawitzky, Tamara A1 - Grauschopf, Thomas A1 - Riener, Andreas T1 - No Need to Slow Down! A Head-up Display Based Warning System for Cyclists for Safe Passage of Parked Vehicles T2 - Adjunct Proceedings: 12th International Conference on Automotive User Interfaces and Interactive Vehicular Applications UR - https://doi.org/10.1145/3409251.3411708 KW - Cyclist safety KW - Head-up display prototype KW - Mixed reality simulation KW - Vehicle2x communication Y1 - 2020 UR - https://doi.org/10.1145/3409251.3411708 SN - 978-1-4503-8066-9 SP - 1 EP - 3 PB - ACM CY - New York ER - TY - CHAP A1 - von Sawitzky, Tamara A1 - Grauschopf, Thomas A1 - Riener, Andreas T1 - Hazard notifications for cyclists: comparison of awareness message modalities in a mixed reality study T2 - IUI '22: 27th International Conference on Intelligent User Interfaces UR - https://doi.org/10.1145/3490099.3511127 KW - accident prevention KW - awareness messages KW - cyclist safety KW - connected traffic KW - head-mounted display KW - vulnerable road users Y1 - 2022 UR - https://doi.org/10.1145/3490099.3511127 SN - 978-1-4503-9144-3 SP - 310 EP - 322 PB - ACM CY - New York ER - TY - CHAP A1 - von Sawitzky, Tamara A1 - Himmels, Chantal A1 - Löcken, Andreas A1 - Grauschopf, Thomas A1 - Riener, Andreas T1 - Investigating Hazard Notifications for Cyclists in Mixed Reality: A Comparative Analysis with a Test Track Study T2 - 15th International ACM Conference on Automotive User Interfaces: Main Conference Proceedings UR - https://doi.org/10.1145/3580585.3606282 KW - Cyclist Safety KW - Dooring KW - Hazard Notifications KW - Mixed Reality Study KW - Test Track Study KW - Validation Y1 - 2023 UR - https://doi.org/10.1145/3580585.3606282 SN - 979-8-4007-0105-4 SP - 202 EP - 212 PB - ACM CY - New York ER - TY - CHAP A1 - von Sawitzky, Tamara A1 - Wintersberger, Philipp A1 - Grauschopf, Thomas A1 - Riener, Andreas T1 - How to Indicate Multiple Potential Hazards to Cyclists on Smart Glasses? Findings from a Focus Group Discussion with Research Experts and UX Students T2 - 16th International Conference on Automotive User Interfaces and Interactive Vehicular Applications: Adjunct Conference Proceedings UR - https://doi.org/10.1145/3641308.3685044 Y1 - 2024 UR - https://doi.org/10.1145/3641308.3685044 SN - 979-8-4007-0520-5 SP - 178 EP - 183 PB - ACM CY - New York ER - TY - CHAP A1 - von Sawitzky, Tamara A1 - Grauschopf, Thomas A1 - Riener, Andreas ED - Fröhlich, Peter ED - Cobus, Vanessa T1 - Supporting Cyclists through Hazard Notification Systems: Insights from the Evaluation of Notification Modalities with a Head-mounted Wearable System T2 - Mensch und Computer 2023 – Workshopband UR - https://doi.org/10.18420/muc2023-mci-ws03-469 KW - Cyclist safety KW - Hazard notification systems KW - Smart helmets KW - Connected traffic Y1 - 2023 UR - https://doi.org/10.18420/muc2023-mci-ws03-469 PB - Gesellschaft für Informatik e.V. CY - Bonn ER -