People go to work in different ways. It depends on where they live. Some people walk to work because they live near their workplaces. Some people go to work by bike because they live farther away, or they like riding bikes and they think it is good for their health.
But some people in the cities go to work by bus or subway, because they are much faster. It is also interesting to take the bus or subway. And some people take the trains to work.
Today more and more people have cars, so they can go to work in their cars. But that may cost too much money. In some places of China, people even go to work by boat, because water is around their houses. Will people go to work by plane? I think so, if necessary.