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Nissan is offering navigation systems in some domestic production models. These systems, which show drivers the vehicle's present location on a CRT map display, free them from anxiety about getting lost when traveling in an unfamiliar area. It is expected that future navigation systems will incorporate two key capabilities. One will be a route guidance capability, which will not only indicate the present location but also select the optimal route to the intended destination and guide drivers there by indicating which direction to take at each intersection along the way. The second capability will be a communications link with the roadside infrastructure for receiving outside information such as traffic congestion data and incorporating that information into route guidance. Nissan has established the core technologies of these navigation capabilities in the past ten years through the development of conceptual prototypes and experimental systems in government-sponsored projects.