Global warming is one of the greatest threats to humanity and the environment. This paper investigates the relationship between the increasing number of private cars in Bandung and its contribution to global warming. Bandung city population in 2010 was about 2.4 million, and the population density was 1,600. The global warming in Bandung has increased due to the intensive urban activities. Global warming is the warming that happens when certain gases in Earth’s atmosphere trap heat. The main sources of global warming in Bandung are transportation, industry and household. The ever increasing number of cars is proportional to the increasing temperatures that reach 27◦C at night and 30◦ during the day especially in downtown Bandung. My research focused on the private cars heading towards the Ciumbuleit-Cihampelas-Silwangi Junction during a busy Saturday afternoon for a period of 3months to see whether all the car seats are occupied by people, and to check whether all the cars are necessarily required on the road. Less than 20% of the cars were at least half filled with people. About 40% of the cars had only the driver and about 40% of the cars had more than 1 person but less than the half filled car capacity. All the Passengers could comfortably fit in only 60% of the cars. The mean of the data was 2.4 occupants per car where the car capacity ranged from 4 to 6 occupants per car. 50% of the cars were unnecessarily required on the road during the study period.

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