What would the world be like if cars could drive themselves? People can not only use the computer to play games, but also invent many new things. Some day you may see an empty car passing by on its way to pick up its owner, or a car full of people, but neither of them are worried about the road ahead.
Well, all of these may come true in the near future. There are several companies, including Google, working on self-driving cars. Because of them, some self-driving cars appear. And most of them work well. No Google self-driving cars get a traffic ticket after they get on the road. These cars are now still under tests. If the tests are successful, we will soon see these electric (电动的）self-driving cars in the street.
Cars can take the place of drivers in some certain situations (情况). For example，cars can park themselves or slow down when they notice someone close by. They can also control the speed when they meet some danger or stop when they get too close to the cars in front.
Scientists and engineers believe, with the help of wireless signals (无线电信号)，cameras, the Internet and GPS, it's possible to make self-driving cars safe. However, some people don't like the idea. An American lawyer (律师),White Drake, for example, doesn't believe these cars are safe.
