The most common problem in developing countries is traffic congestion. The cause of traffics congestion are roads development can not keep up with private car ownership and the development of public transportation is not able to provide large scale services. The number of cars is increasing rapidly every year ,meanwhile the lengths of the roads are still the same. Thus, even in developed countries like America, private car ownerships lead to traffics congestion in so many states. Even though the government of America has already built additional lanes or flyovers, they still can not overcome traffic congestion. Americans are still stuck in the traffic that they used to drive daily despite the lane is already wide.