Driver Response to In-Vehicle Warnings

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Abstract
A field experiment was conducted to investigate the benefits and costs of using an In-Vehicle Information System (IVIS) when the driver is confronted with unexpected situations. The IVIS used in this study included 3 in-vehicle subsystems that provided signing, navigation, and warning information. Three research questions were investigated, each involving the use of an IVIS and response to unexpected situations: (a) Do drivers derive a benefit from using an IVIS? (b) What impact does IVIS information density have on driver behavior and performance? and (c) What impact does driver age have on system use and driving behaviors? As drivers traveled a prescribed route, they were confronted with 6 unexpected situations, including a car approaching from a hidden entrance, an ambulance approaching from the rear, and a crash scene. Results indicated a clear benefit for drivers receiving in-vehicle warning information prior to being confronted with these situations.

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