四级考试翻译

翻译：

Buses used to be the main means of transportation for Chinese people. In recent years, due to the increasing number of private cars, the urban traffic problem has become more and more serious. In order to encourage more people to travel by bus, many cities have been trying to improve the quality of bus service. The facilities of the vehicles have been continuously updated, and the speed of the vehicles has also increased significantly. Bus Fares, however, are still pretty cheap. Now, in most cities, many local senior citizens can take the bus free of charge.