In collaboration with Payame Noor University and Iranian Association For Environmental Assessment (IAEA)

Document Type : Science - Research

Authors

1 Ph.D Candidate , Department of Urban Planning, Faculty of Art, Architecture and Urban Planning, Najafabad Branch, Islamic Azad University, Najafabad, Iran

2 Assistant Professor Department of Urban Planning, Faculty of Art, Architecture and Urban Planning, Najafabad Branch, Islamic Azad University, Najafabad, Iran

3 Department of Urban Planning, Faculty of Art, Architecture and Urban Planning, Najafabad Branch, Islamic Azad University, Najafabad, Iran and Associate Professor Department of Urban Planning, Faculty of Art, Architecture and Urban Planning, Mashhad Branch

Abstract

The metropolises with several business centers have brought the high range of trips to these places. The density and the state of being scattered of these centers have caused the increase and decrease of the trips and transport services and the greenhouse gases emission rate. The goal of this survey is the analysis of the influence of the city spatial oraganization and the study of the city commercial functioning in relation of eachother. The mono centrality and the poly centerality of the cities have an important influence on the trip distances, preventing the waste of time and energy in the cities. The recognition of these factors can decrease the amount of greenhouse gasses and prevent the global warming.The type of research is practical and the analysis method is analytical descriptive. This research has been done after the scientific studies in order to estimate the greenhoause gases on the suggested Clean Development of CDM. The Mashhad metropolis spatial organization has been studied in two scenarioes. The first scenario, namely the mono centrality of the existing city and the other scenario, alongwith triple centrality spatial organization,along the city structure have been considered. The Mashhad metropolis balanced spatial organization has decreased the green houase gas emission up to 43 percent for the private cars . The average trip distance, traveled by the private cars in balanced spatial organizition is decreased about 4 kilometers. The decrease of the greenhouse emission rate for each passenger is 7.9 kilogram CO2 .

Keywords

Main Subjects