The Final 100 Meters: Touch and Joystick Controls for Guiding Autonomous Vehicles

Fully autonomous vehicles are expected soon, yet even in highly automated driving scenarios, there is a need for manual input for short driving-related tasks including parking and navigating when map information is unavailable. Highly autonomous vehicles may not need the traditional steering wheels and pedals, however, it is unclear what input devices are suitable replacements. We explore two input devices in simulated driving tasks navigating a vehicle for the final 100 meters. We explore touch controls by comparing a pyramid-shaped touch surface and an isotonic joystick. Findings from the study show that both alternatives were viable methods for controlling an autonomous vehicle, however, the isotonic joystick was favorable amongst the participants, due to it being more familiar as well as offering more precise control. We discuss possible improvements to future input devices and implications for implementing similar input devices in autonomous vehicles.