Spatial analysis of the impact of urban forms to road-traffic noise in a highly populated city

Road traffic noise is widely distributed in the cities and is more closely related to the urban resident people than other noise sources. To understand the relationship between road-traffic noise level and urban form indicators such as ground space index, floor space index, road density, road length, traffic volume and so on, spatial analysis was performed on highly populated city in South Korea. A system of 125m X 125m grid cells is placed on the city. And the urban forms and noise levels were calculated in each grid. Noise levels were calculated as energetical averages on each grid based on the noise map. Finally, it was simulated for changes in road-traffic noise levels due to urban forms change situations such as land development, road construction, and land use change. This study can be a policy tool to consider residents' noise exposure or area exceeding noise standard in the design process such as the redevelopment of highly populated urban city or the policy decision making process for urban planning.