Urban traffic is a complex subsystem in the whole urban social systems, and it plays a unique and important role in the evolution of cities with more and more attention.

城市交通是整个城市社会系统中的一个复杂的子系统，在城市更新演进过程中起到了独特而重要的作用，越来越受到人们的重视。

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An evolution of ordinary direction services, the 3D capabilities of VZ Navigator VX are available in six cities at launch, including: Chicago, Detroit, Los Angeles, Kansas City, Mo.

ENGADGET: VZ Navigator Version X breaks cover, adds 'virtual city' maps, social features, and more