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Self-driving cars are already here, and they're making their mark on both the technology and transportation sectors. 

Honda Motors (NYSE:HMC) and Tesla Motors (NASDAQ:TSLA) already have semi-autonomous vehicles on the market (though Honda's costs about $40,000 less), and Ford (NYSE:F) says it will have a fully autonomous car on the market in the next five years.

These companies -- along with Apple (NASDAQ:AAPL) and the U.S. government -- believe that self-driving cars will not only make driving safer, but that they'll also bring massive cost savings and create a new shared mobility market

Click on the video below to find out the five key reasons driverless technology is taking off.