1. when there is a bumper to bumper , drivers are very tired, but they drive in their right senses, but drunk drivers must be crazy.

->1.When there is a bumper to bumper,drivers are very tired of driving,but they drive in their right condition.But drunk drivers will be crazy.

2. I think most people don't care about it without they suffer serious damage.

->2. I think most people don't care about it. Without it,they will suffer serious damage.

3. I think it means it is very hard to cross it because nowadays almost every time there is a traffic jam.

->3.In my own understanding,it is hard to cross the road because nowadays,almost every time has traffic jam.

4. Fast transportation enable easier access to coming and going.

->Fast transportation enable us to feel easy in coming and going.

But in fact I don't think it made us all brothers.

->But the fact is I don't think if it bothers us.

5.I don't think people seem to have thought up every solution to the traffic problem.

->I don't think if people find solution of the traffic problem.

There are various complex relations.

->There are various complex relations.

But all people are need to continue effort about seeking the practical traffic solutions. for exemple to keep traffic order, to develop hydrogen engine car to protect environment and so on.

->But all people need to continue their effort in seeking the practical traffic solutions.For example,to keep the traffic order,to develop hydrogen from the car 's engine,to protect environment and so on, people should be responsible.