Design guidelines for usability and safety of In-Vehicle Information System (IVIS) user manual

A wide variety of in-vehicle information systems (IVIS) currently exist and the functionality they offer to drivers is rapidly developing. Although these systems can provide the driver with relevant and up to date information, there is a growing concern that they may interfere with the primary driving task and as a result compromise safety. Instructions need to communicate critical information (how to use a system in the safest and most efficient way) effectively and in a way that can be easily understood, learnt and remembered. Commonly, in-vehicle information system user manuals are provided to drivers to assist them in using a system and also to warn them of potential hazards and system misuse. The information provided influences how the driver interacts with an IVIS and may therefore impact on driving safety. The objective of these guidelines is to provide manufacturers with a summary of the factors that need to be considered when designing and writing an IVIS user manual, in an easy to use format. The guidelines in this document aim to produce a 'user friendly' synthesis of current knowledge, and provide up to date guidance on where to locate more detailed information. The production of information presented to the driver regarding IVIS use should ideally consider: whether an appropriate individual is using the manual; appropriateness of the style/method of information presentation; limiting factors associated with the user population; content of the information presented; and ease with which the information can be accessed and learned.