Advantages 1. high speed passenger can be transported quickly. 2. save time travel allows time to travel more. 3. be able to transport to other transport in the area, or to difficulties. 4. suitable for traveling phase distances 5. There are certain deadlines and relatively on time. Constraint. 1. rates are high. 2. high risk Have the opportunity to experience an accident. 3. unable to access services that require transport to another category. 4. flight paths service Unable to serve.
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