Ergonomics and Safety of Intelligent Driver Interfaces

By Y. Ian Noy | Go to book overview

Chapter 16
Drivers' Cognitive Process
and Route Guidance

Tatsuru Daimon Hironao Kawashima. Keio University, Yokohama, Japan

Motoyuki Akamatsu National Institute of Bioscience and Human Technology, Tsukuba, Japan

In order to navigate (i.e., find their way through the road network to a particular destination), drivers must continually monitor their location relative to a given route and perhaps change route if and when circumstances warrant. A road map helps drivers in this task provided they orient themselves in relation to the map and maintain their orientation. Experience with passive navigation systems that do not provide route guidance (i.e., they display a digital map on a dash-mounted screen that may highlight a route and indicate the current position of the vehicle) reveals that drivers do not always reach their destinations without making navigation errors. Route guidance, in which the system provides en-route guidance in the form of instructions, is considered to be an important and desirable functional element of navigation systems.

In Daimon ( 1992), the characteristics and performance of drivers using an in-vehicle navigation system were compared with drivers using a road map. The results suggest that drivers' cognitive processes are influenced by the design of the navigation aid and its functional elements. Navigation errors and decisions leading to inefficient routes can arise if the navigation system (map or digital display) does not provide route guidance information about where and when to turn. The development of such route guidance functions, however, requires a thorough understanding of how and what kind of information best support the navigation task; that is, an understanding of the cognitive processes involved in wayfinding.

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