Providing a Method for Categorizing and Prioritizing Interchange from Two Points of View of Geometric Design and Traffic Application (Case Study: Tehran)

Document Type : Original Article

Authors

1 Department of Civil Engineering, Khaje Nasir Toosi University of Technology, Tehran, Iran.

2 Science and Research Unit, Azad University, Tehran, Iran.

3 Department of Civil Engineering, Iran University of Science and Technology, Tehran, Iran.

Abstract

Nowadays, with the increase in the number of vehicles on urban roads, a lot of interferences happen in the intersections. Therefore, it seems necessary to pay more attention to the construction or modification of the intersections, especially the interchanges, which have flourished in recent years. On the other hand, given the high costs of construction projects, it is essential to select an intersection in which its modification could address the whole network traffic problem adequately. The development and improvement of non-interconnected intersections with poor geometries and traffics not only improves the efficiency of the intersection but also improves the efficiency of the entire highway network. Therefore, in this paper, a method for classification and prioritization of the intersections is proposed to provide a more comprehensive vision for the planners and governments. This method helps them in the budget allocations and time priorities definitions of the construction or modification project efficiently. Herein, after reviewing the intersections, the TOPSIS method called is employed to analyze the Shannon entropy weights. Next, the geometric and traffic indicators are defined. Then, as a case study, the non-level intersections of Shahid Hemmat highway in Tehran (14 cases) are categorized and prioritized. The results show that a left-handed or right-handed protected intersection with the bandwidth of decrease and increase of the high speeds has a higher priority.

Keywords

References

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