In Bangkok, most of the time in urban area has this problem; Bangkok traffic situation is unsolvable. And the problem never has been properly solved. The current situation is inevitable due to the way they deal with it is they trying to provide more and more highways around the city and providing more public transportation in which they order 4,000 brand new NGV buses and increase more number of taxi. The Expressway and Rapid Transit Authority (ERTA) is created in order to solve Bangkok traffic problem by building toll ways and mass transit system. However, the managing transit system is a really complex task and they lack of expertise in that field and it requires a high technology in which Thailand didn’t have it at that time. Not only on the supply side, that they increase but also the demand side by increasing the amount of fee on the highway in order to decrease the number of car using it.