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One way to solve problem of congestion in cities is to build sky trains which run overhead rather than on or under the ground. What are the advantages and disadvantages of using this solution to solve congestion. WRITING Traffic congestion is one of the most major concerns in virtually every city. In attempt to tackle this problem, it is recommended that sky trains should be built rather than underground ones. This essay will discuss merits and demerits of this solution. On the one hand, there are several benefits of building sky trains. One of its primary benefits is that it might be able to decrease the number of private vehicles participating in the traffic. Sky train is one mean of public transportation, so it can serve a number of dwellers. This means less commuters use private vehicles, resulting in lower rate of traffic congestion. Another benefit is that overhead railways occupy minimal land. They do not require much land space apart from the land required for constructing pillars and tube stations. Hence, they leave enough space for other forms of ground transport and eventually reduce traffic congestion. On the other hands, there are drawbacks of overhead railways that cannot be overlooked. One of them is that contructing this kind of railways cost exorbitantly. To build a system of sky trains, it entails a host of expenses including hiring high qualified engineers and a sheer number of workers as well as buying building materials. Therefore, constructing sky railways may put an onerous burden on national budgets. Another disadvantage is the safety of commuters when using overhead tubes. Since the tubes move on narrow concrete paths, it is considered an extremely unsafe mode of conveyance. To conclude, while sky trains can help tackle traffic problems to some degree, they have not been popular in the world due to high cost and safety concern.