Navigation systems are in common use by drivers and typically present
information using either audio or visual representations. However, there
are many pressures on the driver's cognitive systems in a car and navigational
systems can add to this complexity. In this paper, we present two studies which
investigated how vibro-tactile representations of navigational information,
might be presented to the driver via the steering wheel to ameliorate this
problem. Our results show that adding tactile information to existing audio, or
particularly visual representations, can improve both driving performance and
experience.