  Nowadays, cars offer many possibilities to explore the world around you by
providing location-based information displayed on a 2D-Map. However, this
information is often only available to front-seat passengers while being
restricted to in-car displays. To propose a more natural way of interacting
with the environment, we implemented an augmented reality head-mounted display
to overlay points of interest onto the real world. We aim to compare multiple
selection techniques for digital objects located outside a moving car by
investigating head gaze with dwell time, head gaze with hardware button, eye
gaze with hardware button, and hand pointing with gesture confirmation. Our
study was conducted in a moving car under real-world conditions (N=22), with
significant results indicating that hand pointing usage led to slower and less
precise content selection while eye gaze was preferred by participants and
performed on par with the other techniques.
