Because Street is the biggest public space but cars and motorbikes has been occupying people space.
Mobility or movement is one of the biggest challenges that faces by many cities in the world. A city must able to provide efficient public services so that the society could comfortably enjoy the city by working, shopping, or travelling (Rubini, 2010). In line with the rapid movement development of the urban people, the business of providing the new transportation innovation to support the mobility grows fast. Transportation mode provider now becomes one of the most interesting and beneficial business. Efficiency and affectivity is the main concern of the modern people especially related with time and money. Indeed, transportation gives big contributions on the city development especially in economic, but in environmental aspect transportation more gives negatives impact. Environmental degradation and global warning are the main issues that caused by air pollution.
Sustainable transportation could be one of the most suitable solutions on the effort process to tackle environmental degradation in general and reducing the use of private car especially. Sustainable transportation suggested using public transport as the main choices for people to support their activities. Public transport development could be integrated with the use of non-motorize transportation such as bicycle. Bicycle as eco friendly transportation could use as a feeder from the origin location like house to the closest public transport shelters.
Here is some example of bicycle track around the world:
Semarang City, Indonesia
Surakarta City, Indonesia
Tram, one of my favorite public transportation. Someday Indonesia will have it!!! must have it!!