There is an argument about whether the government should improve transportation by spending more money constructing the road and highway system or money should be used to enhance the quality of public transportation. From my perspective, although both (of these) methods have many positive impacts on traffic, the government should prioritize the maintenance of road network. On the one hand, it is undeniable that the investment in public transportation has many economic, environmental and social advantages. First of all, travelling by means of public transportation such as bus or subway is a way to save money and energy because of the economical ticket price and less fuel energy used. Moreover, the widespread use of public transit service helps alleviate (the) traffic jam and air pollution due to the decrease in private vehicles and gas emission. Finally, a high standard of public transportation will encourage people to use such kind of transport more often. This will lead to some soc...