XR-OOM: Mixing Virtual Driving Simulation with Real Cars and Environments Safely

High-fidelity driving simulators can act as test beds for designing in-vehicle interfaces or validating the safety of novel driver assistance features. XR-OOM is a mixed-reality driving simulator system that enables us to superimpose virtual objects and events into the view of participants engaging in real-world driving in unmodified vehicles. In this work-in-progress paper, we present system requirements and specify our initial proof-of-concept system design. This work enables us to further develop measures for using such systems in ways that are safe, effective, and lead to accurate, repeatable data collection about behavioral responses in hybrid real-world/simulated driving tasks.