This study has been aimed to identify the relationship between planning elements of urban form and trip behavior characteristics focused on planning policy for the Green City by size and locations. For this purpose, the study established the correlation and regression analysis model by using various indices and data regarding these characteristics gathered from 32 cities and 109 gus (boroughs) in Korea. The planning elements of urban form are defined as 3Ds (Density, Diversity and Design) and travel behaviors indices are defined as trip frequency, volume and space-load by trip modes. The main results of this study are as follow. First of all, as the population density increase and road density decrease in metropolis or cities in Seoul metropolitan area, automobile travel behavior tends to decrease and transit travel behavior tends to increase. Secondly, the analysis results demonstrate that the population-employment mixture and industry diversity related to whole sale, retails and services are the effective factors to decrease automobile-dependence of city. Thirdly, some diversity and design factors of urban form are diverse influence on travel behavior characteristics by city size and location. In summary, urban form adjustment by size and locations can function as an effective planning method for realizing the Green city in Korea.