In addition, enhanced popular features will return with "GT Career Simulation Mode" and "GT Arcade Mode."
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In Gran Turismo 4, the characteristics of the cars are realistically designed and calculated so that they handle to the "real life" physics of that particular vehicle, taking into account weight, speed, friction, wind, and more. Courses include various sites such as Nurburgring Nordschleife, New York City, the Grand Canyon, Tsukuba Circuit, and more. Highly detailed vehicles and environment mapping create broadcast-quality graphics, with light and competitor car reflections on the player's automobile to leaves on a tree shaking in the wind.