【正文】 arproof bicycle lock is on the rise testifies to the seriousness of the matter of bicycle theft. Meanwhile, we can almost always see one or two abandoned bicycles in a bicycle rack: such bicycles remain that way for months or years, wasting public spaces.4. Structural strategy for the promotion of bicycle use In the preceding chapter, we examined the context of bicycle use in terms of user, bicycle, social infrastructure, material infrastructure, natural environment, and the occurrence of negative incidents. Among these, bicycle, social infrastructure, and material infrastructure are the factors that can be improved by the enactment of human creativity and will. On the other hand, it is impossible to control the remainder of the factors such as user characteristics, natural environment in which one should ride a bicycle, and negative effects like bicycle incidents. However, these matters can be controlled to a large extent through the manipulation of bicycle, social infrastructure, and material infrastructure. Therefore, we can establish a structural strategy for the promotion of bicycle use by matching user characteristics, adverse natural environment, and negative incidents with bicycle supply, material infrastructure, and social infrastructure, respectively. In what follows, we will propose the solutions to the problems that arise in the areas of user demand, adverse natural environment, and negative incident. Meeting user demand Structural Strategy for the Promotion of Bicycle UseIn order to meet user demand, it is required to take into consideration the purpose and method of bicycle use. The purpose of bicycle use can be divided into muting to work place or school, longdistance travel, moving in the downtown area, and physical exercise, while the method of bicycle use is prise of riding whole distance and transferring to other transportation. If one regards a bicycle as a mere instrument for moving to a destination, the time length required to ride the bicycle bears little significance: what matters is the fast and safe movement. In this case, one may use a bus, a train, or a subway to move fast from one terminal to another, and then ride a bicycle to reach the final destination. For the purposes of physical exercise and travel, the time length of bicycle riding bees important. In this case, one would only use a bicycle at the expense of other transportations. Thus, the method of bicycle use varies depending on the purpose of bicycle use. To support this mutual relationship, it is required to build reliable public transportation transfer systems. Methods of Bicycle Use Depending on the Purpose of Bicycle Use(Left: Transferring to Other Transportation, Right: Riding Whole Distance)In the mean time, the introduction of bicycle rental system, which is to promote urbanites39。 bicycle use in the downtown areas, is being seriously considered by the local governments in South Korea. After V233。lib39。 the bicycle transit system introduced by the city of Paris turned out to be successful, the local governments in South Korea are trying to install similar systems. The prospect of the bicycle transit system looks optimistic in that it will take up a part of the demand for public transportation and make people feel familiar with bicycles, which will eventually promote bicycle use among the public. However, It is desired to examine more closely the needs and deeds of the users to make the system produce practical oute. As a way to invigorate bicycle use among the public, the local governments give various benefits to the customers who use bicycle to shop at department stores and downtown mercial districts. For this reason, it is needed to develop a livingfriendly bicycle which emphasizes practicality and convenience. As popular interest in leisuretime activities grows, there appeared the people who drive cars to arrive at travel spots where they ride bicycles for sightseeing. Riding bicycle to a travel spot or a place for bicycling not only demands enormous physical strength but also involves danger in the process of moving out of the downtown by the bicycle. Therefore, it is needed to reinforce the folding function of a bicycle to be easily loaded into a car. It is also desired to develop new bicycle designs for new types of leisure activities such as longdistance bicycle travel. What draws our attention in future population trend is the change of population structure and the customization of bicycle design. A rapidly aging society like South Korea requires the development of bicycle that meets the physical and mental demands of aged users, while the customization of bicycle design refers to building of bicycle body and design according to personal specifications or preference. In addition, the efforts to promote the public interest in bicycle use and motivate people to use bicycles should be made in area of social infrastructure. Not only the financial supports for bicycle users such as tax cut and the bestowment of carbon emission right, but also educational programs and publicities are required to induce ordinary people to consider bicycle use seriously. Especially, the education of bicycle use for preschool children and students will make them think positively about bicycle use throughout their lives. Overing adverse natural environment Adverse natural environment exist such as the road condition characterized by the fluctuations in altitude and the weather condition characterized by drastic changes. To overe, for instance, the condition of inclined road, a bicycle can be equipped with an electronic motor or an instrument that accelerates power transmission. In terms of facility, a bicycle lift can be installed on a slope. To cope with unfavorable weather conditions such as rain, cold weather, and hot weather, a lid can be attached onto a bicycle. Of course, no all bicycles are to be covered with lids: it is needed to clarify target customers who would need lidbicycle