The peri-urban zone, also known as the rural-urban fringe, has been a focus of research for over 50 years. It is a crucial part of urban and metropolitan regions, providing living spaces, job opportunities, recreational activities, and infrastructure development. While traditionally viewed as a simple zone structure, recent research has highlighted more complex patterns and dynamics around cities. Regional metropolitan systems are interconnected social and economic systems, with public intervention often based on administrative boundaries. Overall, the peri-urban zone plays a vital role in the functioning of urban and metropolitan regions.