The subway provides convenience to commuter during commute time as a transportation that is used by many people. However, because of high-rise buildings and city concentrated of population in the main cities even the convenient subway became uncomfortable in the time when many people use. We will rise the linear of the subway which connects essential area of city and the countryside into a upper part. It is because bicycle is the transportation which can be used during rush-hour rather than car or subway that has traffic jam and inconvenience
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