One possible version:

How to Solve the Problem of Heavy Traffic?

With the development of economy, more and more vehicles are going on the streets. As a result, most cities, especially the big ones, suffer from traffic congestion. Heavy traffic has become one of the major concerns of the society.

To solve the problem, people have put forward many solutions, of which the following two are typical. One is to lay down more roads. It will make the highways less crowded and quicken the flow of traffic. Another is to open up more bus routes. In this case, more people will take buses rather ride bikes or drive cars. Then the number of cars and bikes racing on the streets will decline.

However, either of the two solutions brings about problems at the same time. The former may occupy too much land, which can be otherwise more effectively used. For the latter, it will cause inconvenience to those who are living far away from the bus stops. The best solution, in my eyes is to combine the two; building more roads where hand is less profitable and opening up more buses routes in downtown areas at once.