First of all, a public transportation system such as a train and a bus are safer than the use of a my-car. In fact, a large number of people are victimized with a car accident every year. In addition, so many people are even dead or seriously damaged by the accident. On the other hand, public transportation are well-operated by a specialized company or a government and all drivers or operators are well-trained to save customers life. If you wish to live longer or to have a less risky life, you better to choose public transportation.