  Simulators are an essential tool for behavioural and interaction research on
driving, due to the safety, cost, and experimental control issues of on-road
driving experiments. The most advanced simulators use expensive 360 degree
projections systems to ensure visual fidelity, full field of view, and
immersion. However, similar visual fidelity can be achieved affordably using a
virtual reality (VR) based visual interface. We present DReyeVR, an open-source
VR based driving simulator platform designed with behavioural and interaction
research priorities in mind. DReyeVR (read "driver") is based on Unreal Engine
and the CARLA autonomous vehicle simulator and has features such as eye
tracking, a functional driving heads-up display (HUD) and vehicle audio, custom
definable routes and traffic scenarios, experimental logging, replay
capabilities, and compatibility with ROS. We describe the hardware required to
deploy this simulator for under $5000$ USD, much cheaper than commercially
available simulators. Finally, we describe how DReyeVR may be leveraged to
answer an interaction research question in an example scenario.
