To Infiniti, beyond? Next Nissan Fuga will debut at Tokyo Motor Show. [7Tune via Autoblog]

In an effort to keep families alive on long road trips, Nissan has combined two cruise control technologies: radar and navigation. Radar-based cruise control that senses the distance between cars isn't a new idea, but it's a good one. The interesting technology is the navigation-enabled system that senses when a curve…