4th WCSET-2015 at Japan

 

Architecture and Planning:

Title:           Comparison of intersection capacity with traffic flow in 2008, 2014 and 2025 in Kabul Metropolitan area
Authors:      Qudratullah, Takuya MARUYAMA
Abstract:     Kabul the capital of Afghanistan started the rapid growing after war ended in 2001. The people in the remote areas had been forced by security problems and jobs opportunities to migrate to urban area of Kabul city. The transportation infrastructures have been either deteriorated or damaged during the three decades of war. Most of Kabul transport facilities especially intersections are witness of high traffic congestions during peak hours, the intersections in Kabul city are not equipped with signals. The intersection has been chosen for this research is a typical crossroads which can represents most of intersections in urban area of Kabul city, this intersection suffers from the high traffic jams in reality. To estimate the capacity and compare to the traffic flow in order to find out the congestion rates in 2008, 2014 and 2025 are the main objectives of this research. In this paper, a data has been used which was collected during person trip (PT) survey by (JICA) in 2008, the PT data has been used for estimation of trips on transport links in 2008 and forecasted to 2025. Additionally, a traffic count (TC) and geometric surveys were conducted in the proposed intersection during 2014, the data collected during the TC and geometric surveys has been used to analyze the saturation rate, capacity, degree of saturation, and signals timing of intersection. The results indicate that the intersection was not oversaturated in 2008 and 2014, and the causes of traffic crowds occurred in the transport node are misused of intersection by drivers and non-equipped of intersection with traffic signals. Conversely, the forecasted demand shows that the intersection will be oversaturated and the volume per capacity (V/C) ratio will be 1.9 in 2025. In addition, introducing signals can increase capacity and decrease the signal cycle length from 155sec to 68sec.

Keywords:   Kabul, Vehicle Mode, Node, Degree of Saturation, Oversaturated
Pages:          446-450

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