In recent years, many cities have had a problem related to a traffic jam because of the amount of car accumulation. I think I can suggest a several ideas to the authorities to solve this problem. First, the government should prepare the public transportation route. For example, Indonesia has a decent public transport system, although Monorail trains are probably the better option for short distances and trains over long distances. But these public transportations are limited and most developed only in Java and Bali. With the sufficient of public transportation all over Indonesia, this instantly decreases the number of car owners.