TRAFFIC MOVEMENTS RISK EVALUATION ON THE PHYSICAL AREA AT UNSIGNALIZED INTERSECTION USING TTC INDICATOR

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BOROUJERDIAN A.M.; ABBASI S.; KARIMI A.

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Journal: Modares Civil Engineering journal Year:2016 | Volume:15 | Issue:4 Page(s): 63-72

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Information Journal Paper

Title

TRAFFIC MOVEMENTS RISK EVALUATION ON THE PHYSICAL AREA AT UNSIGNALIZED INTERSECTION USING TTC INDICATOR

Author(s)

BOROUJERDIAN A.M. | ABBASI S. | KARIMI A. | Issue Writer Certificate

Keywords

TRAFFIC SAFETYQ2

TRAFFIC CONFLICTQ2

ACCIDENT TIME INDEXQ1

RISKQ2

HAZARDOUS SITUATIONSQ2

Abstract

Safety is an area of increased attention within transportation engineering. The development of cities caused increasing of vehicles and accidents. The accident statistics show that the intersection points are one of the most eventful that occur 50 percent of all accident and 25 percent of human casualties.The first step in improving TRAFFIC SAFETY is identifying HAZARDOUS SITUATIONS. Based on trafficaccidents’ data, identifying HAZARDOUS SITUATIONS in roads and network is possible. However, in small areas such as intersections, especially in maneuvers resolution, identifying HAZARDOUS SITUATIONS is impossible using accident’s data. Due to shortcomings of traffic accident data, using surrogate measures such as TRAFFIC SAFETY indicators have been taken into consideration. Therefore, in this study was used the TRAFFIC CONFLICT. According to different problems of traditional TRAFFIC SAFETY evaluation, the using of necessary methods is needed. In recent years, using of TRAFFIC CONFLICT indicator has increased. Time-to-Collision (TTC) is one of the first and most widely used time-based indicators. For using of these indicators the users’ speed, moving direction is needed. For high attention in safety evaluations and considering the type of the vehicle, two dimensional modeling of vehicle is presented. The critical interactions density index was based on the TTC indicator and traffic volume. The HAZARDOUS SITUATIONS were identified three-dimensional by using ARC GIS software in the physical area of the intersection. By using this method, there is possible to identify HAZARDOUS SITUATIONS based on critical TRAFFIC CONFLICT. By using information obtained, determined how to improve intersection safety. Four-leg unsignalized intersection located at the crossroad of Vessaleshirazi-Bozorgmehr in Tehran has been selected as study location. By video analyzing, data was recorded and HAZARDOUS SITUATIONS were determined by using the method proposed in this paper. The evaluation results show that at the entrance minor path to major path the HAZARDOUS SITUATIONS has been located because of conflict of the right movement minor path with the direct movement of the major path and the left movement minor path with the direct movement major path. The RISK of right movement of minor path, conflict to direct movement of the major path is 245.1 that about 8 times the average RISK of all movements and, the RISK of similar conflict on the other side of the intersection is 89.These conflict are the main reason for the increasing of the intersection RISK.

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APA: Copy

BOROUJERDIAN, A.M., ABBASI, S., & KARIMI, A.. (2016). TRAFFIC MOVEMENTS RISK EVALUATION ON THE PHYSICAL AREA AT UNSIGNALIZED INTERSECTION USING TTC INDICATOR. MODARES CIVIL ENGINEERING JOURNAL, 15(4), 63-72. SID. https://sid.ir/paper/256919/en

Vancouver: Copy

BOROUJERDIAN A.M., ABBASI S., KARIMI A.. TRAFFIC MOVEMENTS RISK EVALUATION ON THE PHYSICAL AREA AT UNSIGNALIZED INTERSECTION USING TTC INDICATOR. MODARES CIVIL ENGINEERING JOURNAL[Internet]. 2016;15(4):63-72. Available from: https://sid.ir/paper/256919/en

IEEE: Copy

A.M. BOROUJERDIAN, S. ABBASI, and A. KARIMI, “TRAFFIC MOVEMENTS RISK EVALUATION ON THE PHYSICAL AREA AT UNSIGNALIZED INTERSECTION USING TTC INDICATOR,” MODARES CIVIL ENGINEERING JOURNAL, vol. 15, no. 4, pp. 63–72, 2016, [Online]. Available: https://sid.ir/paper/256919/en

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