With driving currently taking every bit of the driver's attention - until at least more progress is made on self-driving cars - critics have warned of safety concerns.

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The cabin is pretty quiet although we did notice a little bit of wind noise coming from the driver-side frameless window in our test car.

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"You run a bit against the wall (as a second driver) so this will be different, " said Glock, who missed the final three races of the season after crashing during qualifying for the Japanese Grand Prix.

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For a bit of respite from the fame and adulation he faces daily in South Korea, and for a bit of fun, Lee once became a taxi driver for a few days.

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Caterpillar has said that China is still a major growth driver for the company, but that competition is increasing a little bit.

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It crashes, and the driver gets out and has to run, at which point the game looks a little bit like a Rockstar title.

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"I learnt a bit about what went on that day when I was in the taxi from the taxi driver, " he said.

BBC: Aamir Siddiqi

Getting a driver's license is a rite of passage for many teenagers, but the process was a bit more challenging for 19-year-old Mulligan of Acworth, Georgia.

CNN: Teen drivers with ADD a problem on the road