@inproceedings{RollwagenRiener2023, author = {Rollwagen, Alice and Riener, Andreas}, title = {Enhancing User Acceptance: Investigating Effective Approaches to Communicating Information on Automated Shuttle Buses through eHMI Concepts}, booktitle = {Applied Research Conference 2023 Conference Proceedings: 3rd July 2023 Technische Hochschule Ingolstadt}, editor = {Vaculin, Ondrej}, publisher = {Technische Hochschule Ingolstadt}, address = {Ingolstadt}, doi = {https://doi.org/10.57825/repo_in-5244}, pages = {265 -- 270}, year = {2023}, language = {en} } @article{SchussRollwagenRiener2022, author = {Schuß, Martina and Rollwagen, Alice and Riener, Andreas}, title = {Understanding Operator Influence in Automated Urban Shuttle Buses and Recommendations for Future Development}, volume = {6}, pages = {109}, journal = {Multimodal Technologies and Interaction}, number = {12}, publisher = {MDPI}, address = {Basel}, issn = {2414-4088}, doi = {https://doi.org/10.3390/mti6120109}, year = {2022}, abstract = {The automation of our vehicles is an all-present topic with great benefits for society, particularly in the area of public transport and pilot projects of automated shuttle buses are already underway. However, they do not show the full potential of using them as a supplement to public transport, since single-occupancy registration of the vehicles usually allows only slow speeds and also requires a substitute driver on board. In our study, we aim to (1) examine the status quo of its user acceptance and (2) identify the roles of the operators and their tasks in automated urban shuttle buses. We conducted a mixed-method study including in-depth interviews, questionnaires, and in-the-field observations visiting pilot projects of the two most widespread pilot projects on German streets. Our results uncover the multiple roles and tasks the human operators currently assume. Furthermore, we developed design approaches for a digital companion substituting the operator in a long run and evaluated these concepts. A remote operator or a hologram were preferred solutions and we propose further design requirements for such companions. This work helps to understand the individual roles that operators currently occupy and provides a good basis for concepts of technologies that will perform these tasks in the future.}, language = {en} } @inproceedings{RollwagenSchussRiener2023, author = {Rollwagen, Alice and Schuß, Martina and Riener, Andreas}, title = {Enhancing Accessibility for Diverse User Groups in Automated Shuttle Buses: Implications from a User Enactment Study}, booktitle = {15th International ACM Conference on Automotive User Interfaces: Adjunct Conference Proceedings}, publisher = {ACM}, address = {New York}, isbn = {979-8-4007-0112-2}, doi = {https://doi.org/10.1145/3581961.3609876}, pages = {77 -- 82}, year = {2023}, language = {en} } @inproceedings{RollwagenHornSchmidtneretal.2025, author = {Rollwagen, Alice and Horn, Alexander and Schmidtner, Stefanie and Riener, Andreas}, title = {Communicating Uncertainty in Arrival Time Predictions for Public Transport: A Comparison of Point and Interval Forecasts}, booktitle = {MuC´25: Proceedings of the 2025 Conference on Mensch und Computer}, publisher = {ACM}, address = {New York}, isbn = {979-8-4007-1582-2}, doi = {https://doi.org/10.1145/3743049.3748542}, pages = {515 -- 519}, year = {2025}, abstract = {In public transport, arrival times are typically communicated as point forecasts, aiming to present precise estimates. However, current prediction models are unable to provide such precise and reliable estimates due to unpredictable events. This results in arrival times on passenger information systems appearing inaccurate due to the lack of communicated uncertainty. We therefore investigated interval forecasts as an alternative in an online study, aiming to better communicate uncertainty in arrival times. Our findings indicate that interval forecasts improve the communication of uncertainty. Further, user satisfaction was driven primarily by waiting time, and this relationship was moderated by the forecast concept. Point forecasts were only well received when the bus arrived as predicted, otherwise users preferred the broader interval forecasts. Participants valued accuracy over precision when judging arrival times.}, language = {en} } @inproceedings{RollwagenAlvarezRiener2025, author = {Rollwagen, Alice and Alvarez, Ignacio and Riener, Andreas}, title = {Reality Check: Real-World Observations of State-of-the-Art Driver Assistance Systems}, booktitle = {Adjunct Conference Proceedings: 17th International ACM Conference on Automotive User Interfaces and Interactive Vehicular Applications, September 22-25, 2025, Brisbane, Australia}, publisher = {ACM}, address = {New York}, isbn = {979-8-4007-2014-7}, doi = {https://doi.org/10.1145/3744335.3758487}, pages = {88 -- 93}, year = {2025}, language = {en} }