Today, although public transport is increasingly modern and convenient to move, we still have many problems that we do not want. First, public transport is not reliable for much. We may be late to work if the bus or subway to the station late, damaged or have pickup continuously for long periods. Furthermore, we can not expect them waiting for us even a minute. We will move forward if we are late, so we must wait for the next trip. Therefore, we have to sit in the dock on time and always have to accept the late arrival of transport. Some people feel uncomfortable about this. Second, public transport and crowded very cramped. Too many people moving in the same medium can cause irritation and discomfort. We have to sit with strangers without knowing who they are, which is the cause of the collision unnecessary. Finally, it is our dirt. They are not the property of anyone, thus having responsibility for their hygiene can hardly be done on a regular basis. Each vehicle must be carrying lots of passengers, resulting in the toilet can not be guaranteed. It's dangerous for our health and the other passengers.
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