The development of bicycle into trandem: The bike can be used as tandem or single depend of the necessity

The issue of traffic jam in Indonesia's big cities alike in Jakarta, Bandung, Medan, Makassar and Surabaya encourage the government, civilization and transportation expert initiate to consider a elucidation to solve the problematic above. The growing of the vehicle number which is extended faster than the establishment of road affect the bottleneck could not to be avoided. Furthermore the pollution problem which is produced by car exhaust where the number of them always increase each year make the air pollution in the settlement becomes crucial. Additionally within the backwards issue of the reducing of the using of fuel because of the source of them become limited. People have to consider sincerely before buying the vehicle due to the high operational cost. One of the solutions of the problem is the using of human power vehicle as The study try to respond the need of people to enjoy the using of tandem bike but also still could be used as the single bike more over the storage problem is disappear. The research team agrees to give the name of this 'novel bike' as Trandem: the existing tandem bike which is transform to the dual function.