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Human Factors: The Journal of the Human Factors and Ergonomics Society
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An On-the-Road Comparison of In-Vehicle Navigation Assistance Systems

David W. Eby

The University of Michigan Transportation Research Institute, Ann Arbor, Michigan

Lidia P. Kostyniuk

The University of Michigan Transportation Research Institute, Ann Arbor, Michigan

We compared system performance and driver opinion of 3 in-vehicle navigation aids - two advanced traveler information systems (ATISs; Ali-Scout and TetraStar) and written instructions - when used on the road concurrently under identical conditions. Few drivers in the study had difficulty finding initial routes or became lost. Users of Ali-Scout, an ATIS that utilizes traffic information in routing, drove longer-distance routes, got lost more frequently, and gave their system less positive ratings than did TetraStar users. Users of the 2 ATISs traversed routes that were significantly shorter in duration than those driven by users of written instructions. The time savings benefit of the advanced technology systems over written instructions was greatest during peak traffic conditions. Drivers who were familiar with the road network, overall, had less difficulty finding destinations and drove shorter-duration routes than drivers who were unfamiliar with the road network. Actual or potential applications of this research include improving the design of technologies that provide navigation assistance to travelers.

Human Factors: The Journal of the Human Factors and Ergonomics Society, Vol. 41, No. 2, 295-311 (1999)
DOI: 10.1518/001872099779591222
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