In the modern days, sky trains are becoming more and more popular in every city as the indispensable public transport in daily life. Although sky train has both benefits and drawbacks. I believe it’s the vehicle that all nations should invest in as the priority part of the country's strategy. Let’s begin by looking at the advantages of the sky train.
On the one hand, there are several benefits of building sky trains. One of its primary benefits is that it may be able to decrease the number of private vehicles participating in the traffic. Sky train is one means of public transportation, so it can serve a number of dwellers which means fewer commuters use private vehicles, resulting in a lower rate of traffic congestion. Another advantage of the overhead railroad is that it occupies minimal land compared to other kinds of transport. Hence, they leave enough space for other forms of ground transport and eventually reduce the traffic jams.
On the other hand, there are many negative sides of overhead trains that cannot be overlooked. One of them is that constructing this kind of railway costs exorbitantly. Building this system demands a variety of expenses such as hiring highly qualified engineers and buying a number of expensive materials. Therefore, constructing the sky railways tends to consume a large amount of the government’s budget, so it’s not the best option for developing countries with financial constraints. Besides, the limited destination is another drawback that people usually think about. The sky train has a fixed destination, so people are forced to walk or use a second vehicle to reach the other destinations, which leads to inconvenience for passengers.
In conclusion, although the sky trains may have some cons, if the government coordinates it with other transportation systems, the traffic issues in big cities could be solved. 
In the modern days, sky  
trains
 are becoming more and more popular in every city as the indispensable public transport in daily life. Although sky  
train
 has both benefits and drawbacks. I believe it’s the  
vehicle
 that all nations should invest in as the priority part of the country's strategy.  
Let
’s  
begin
 by looking at the advantages of the sky train.
On the one hand, there are several benefits of building sky  
trains
. One of its primary benefits is that it may be able to decrease the number of private  
vehicles
 participating in the  
traffic
. Sky  
train
 is one means of public transportation,  
so
 it can serve a number of dwellers which means fewer commuters  
use
 private  
vehicles
, resulting in a lower rate of  
traffic
 congestion. Another advantage of the overhead railroad is that it occupies minimal land compared to  
other
 kinds of transport.  
Hence
, they  
leave
  enough
 space for  
other
 forms of ground transport and  
eventually
  reduce
 the  
traffic
 jams.
On the  
other
 hand, there are  
many
  negative
 sides of overhead  
trains
 that cannot  
be overlooked
. One of them is that constructing this kind of railway costs  
exorbitantly
. Building this system demands a variety of expenses such as hiring  
highly
 qualified engineers and buying a number of expensive materials.  
Therefore
, constructing the sky railways tends to consume a large amount of the  
government
’s budget,  
so
 it’s not the best option for  
developing countries
 with financial constraints.  
Besides
, the limited destination is another drawback that  
people
  usually
  think
 about. The sky  
train
 has a  
fixed
 destination,  
so
  people
  are forced
 to walk or  
use
 a second  
vehicle
 to reach the  
other
 destinations, which leads to inconvenience for passengers. 
In conclusion
, although the sky  
trains
 may have  
some
 cons, if the  
government
 coordinates it with  
other
 transportation systems, the  
traffic
 issues in  
big
 cities could  
be solved
.