Investigating the effective factors in the horizontal growth of metropolises with emphasis on preparation projects Case study of Tabriz metropolis

One of the main problems that limit sustainable urban development, especially in metropolitan areas, is physical development and urban creep, or marginal development against the text. Urban creep is known in Western countries as Spiral Growth, which is the irregular and irregular development of cities during the period of modernism. The rapid and uncontrolled growth of cities before the Islamic Revolution in the form of comprehensive urban plans and after that in the form of preparation plans, development and seizure of cities on the surrounding lands and suburbs has caused. The main purpose of this study is to investigate the role of preparation projects implemented in the physical development of Tabriz. The required data has been obtained from the East Azarbaijan Province and Urban Development Organization. The present article is considered as applied-practical research in terms of research purpose and descriptive research in terms of nature and research method. One of the main results of the research is the uneven development of Tabriz city, especially on the active fault north of Tabriz, which passes through Marzdaran and Bagh Misheh towns. Also, the direct effect of preparation projects on the physical development of Tabriz, the role of organic factors in The format of comprehensive plans and urban preparation is another effective parameter in the creep of Tabriz. One of the most effective policies in the rapid growth of Tabriz is the preparation plans that are mostly designed and implemented in the eastern axis of the city.