Fourth, public transportation is indeed of significance for part of the population.

It is true that purchasing private cars represents the tendency of the times, but we have to mind the fact that there is always a group of persons who don’t own cars. For this group, maybe public transportation is the optimal choice though buses are often late and crowded and metro stations are quite far away. In other words, before they become persons who have private cars, they still take public transportation regardless of its disadvantages.

Fifth, the improvement of public transportation doesn’t meet the demand of solving traffic problem.

As I mentioned in the above point, the customer group of public transportation is relatively fixed. That is, those who have cars would not take buses or metro, even if advancements of them are expanded. For whatever progress has taken place, its nature of public will never be changed. However, people now prefer customized services to public services; therefore, public transportation is not a favorable choice for this part of people who already enjoy customized services. Thus the amount of vehicles on highways will not decrease because of public transportation, so increasing input in public transportation would not solve or ease traffic jam.

Now we can come to conclusion: As a part of social welfare, the improvement of public transportation enables a certain group of people to benefit from it, however, it doesn’t make big change on the current traffic condition. Highways are serving as basics of transportation system and more importantly, of economy. By enhancing highways, our traffic problem can be solved or eased with high efficiency.