Design Decision Aids and Human Factors Guidelines for ATIS Displays
Michael A. Mollenhauer Melissa C. Hulse Thomas A. Dingus Steven K. Jahns Cher Carney University of Iowa
Advanced traveler information systems (ATIS) will incorporate functions that enable drivers to access information that was previously unavailable or was retrieved from domains outside of vehicle. More specifically, the proposed ATIS functions will encompass in-vehicle routing and navigation systems (IRANS), in-vehicle motorist services and information systems (IMSIS), in-vehicle signing and information systems (ISIS), in-vehicle safety and warning systems (IVSAWS), and commercial vehicle operation (CVO) information systems. When giving drivers access to such systems inside the vehicle, designers must consider not only usability, but also safety (i.e., overloading or distracting the driver). One of the primary concerns is that ATIS will inadvertently reduce safety instead of improving it. The overall impact of ATIS on driving will depend largely on the driver's ability and desire to successfully utilize the information provided. If ATIS is not developed to be driver friendly and easily utilized by the majority of drivers, its overall effectiveness will suffer.
This chapter explores the decisions designers must make when developing ATIS displays. It also describes a design support process that has been developed to help formulate answers that reflect current human factors research and accepted design principles. Examples of decision tools that make up this process will be provided along with a description of how these tools can be used together to aid in the design process. In addition, specific results (generated using these design tools to analyze a large set of proposed ATIS information items) are also presented and discussed.