Image source: Getty Images.

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

Honda Motors (HMC -2.21%) and Tesla Motors (TSLA 4.96%) already have semi-autonomous vehicles on the market (though Honda's costs about $40,000 less), and Ford (F 0.69%) says it will have a fully autonomous car on the market in the next five years.

These companies -- along with Apple (AAPL 0.52%) 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.