The concept of Transit-Oriented Development (TOD) stems from the idea of sustainable urban development. It uses an efficient public transportation system as the main bone of urban development, guiding the orderly distribution of urban functions and activities such as residential, work, shopping, and leisure spaces along transit corridors and station areas. TOD also incorporates complex land use and pedestrian-friendly environment design to shape a highly livable, accessible, and efficient urban development pattern and land use model, reducing people's reliance on private vehicles, enhancing the effectiveness of land development and public facility allocation, improving the efficiency of public transportation services, and reducing the inappropriate outward expansion of cities.
 

A well-designed TOD urban development model focuses on the 3D+T aspects of planning: Density, Diversity, Design, and Transit. By improving the intensity of land use around public transportation nodes, integrating efficient urban functions, and creating a comfortable and accessible walking environment within the walking range of public transportation nodes, it enhances the effectiveness of land development and public facility allocation, supports public transportation operations, and shapes a sustainable urban pattern and land use model that is highly livable, accessible, and efficient.

• Hight Density：
  By increasing the density and compactness of land use around public transportation stations, it aims to attract enough residents, workers, and consumers to maximize the effectiveness of public transportation services and the benefits of land development.

• Diversity：
  By adopting a complex development approach, it aims to increase the convenience and closeness of transportation between work, leisure, and residential activities, reduce travel trips, and enhance the economic and social diversity and vitality of station areas.

• Design：
  By creating pedestrian-friendly and comfortable walking environments through urban design, it encourages people to use public transportation systems. This provides pedestrians with a good walking experience and helps to promote the use of public transportation.

• Transit：
  Strengthening the connection and transfer function between different modes of public transportation, planning for bicycle lane systems, and providing shared mobility spaces can enhance the convenience of transferring between modes of transportation and increase the public's willingness to choose public transportation as their mode of travel.