This thesis addresses a fundamental Human Factors question associated with the design of
the Human-Machine Interface (HMI) for in-vehicle electronic route guidance systems: what
navigation information should such systems provide to drivers? To avoid the development
of systems which demand excessive amounts of drivers' attention and processing resources
or which are not satisfactory to the intended user population, it is critical that appropriate
information is provided when and where needed. However, a review of the relevant
literature revealed a paucity of research concerning this issue. [Continues.
