ANN ARBOR, MI
The Collaborative Safety Research Center (CSRC) is proud to share the newly published ISO/PAS 23735:2025, “Road vehicles — Ergonomic design guidance for external visual communication from automated vehicles to other road users.” Published by the International Organization for Standardization (ISO), this document provides a standard framework for considering automated vehicle communications with pedestrians.
ISO/PAS 23735:2025 reflects collaborative efforts, with CSRC research playing a key role in its development. The document provides guidelines for creating external lighting and signals for pedestrians while also highlighting CSRC research that vehicle movement can also serve as a communication tool, potentially reducing unnecessary hardware.
Several CSRC publications are cited in the standard, demonstrating specific contributions to these guidelines:
- Domeyer, J.E., Lee, J.D., Toyoda, H. (2020). Vehicle automation–other road user communication and coordination: Theory and mechanisms. IEEE Access.
- Domeyer, J.E., Lee, J.D., Toyoda, H., Mehler, B., Reimer, B. (2020). Interdependence in vehicle-pedestrian encounters and its implications for vehicle automation. IEEE Transactions on Intelligent Transportation Systems.
- Lee, J.D., Liu, S.-Y., Domeyer, J.E., DinparastDjadid, A. (2021). Assessing driver trust of automated vehicle driving styles. Human Factors.
Several other CSRC publications contributed to the content of the standard, focusing on driver-pedestrian communication dynamics and safe road crossing cues.
With the completion of this standardization effort, CSRC’s Josh Domeyer also is guest co-editing a special issue of the journal Transportation Research Part F: Traffic Psychology and Behaviour. This special issue will aim to identify and promote the next phase of innovation in pedestrian interaction research.
CSRC’s promotes a future safe mobility society for all through external collaborations to answer research questions aiming to inform safety policy and future safe products.