Volume 17, Issue 5 (2017)                   MJCE 2017, 17(5): 181-192 | Back to browse issues page

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Boroujerdian A M. The effect of using aural warning signs to increase pedestrian safety in urban Passages based on traffic conflict index. MJCE. 2017; 17 (5) :181-192
URL: http://journals.modares.ac.ir/article-16-11888-en.html
Abstract:   (752 Views)
Road accident is one of the most important factors which are treating the country general safety and it is a real national disaster. Statistics show that despite of different indicators, the traffic accident risk’s and its casualties are in high level. In driving accident pedestrians have the less immunity therefore it is the cause of the most damage then allocated the most percentage of damage and injury. One of the most important factors in traffic engineering is pedestrian crossing safety. Investigating the parameters affecting the pedestrian’s safety margins and their relationship on the identifying the main causes of accidents relate to pedestrians on the streets without the traffic signs and driving has an important role. Although the raise of vehicle use growth rate in Iran has become an unavoidable issue and every day urban activities as pedestrians are accounted as one of most necessary parts of modern days life, numerous challenges in regard with decreased speed and mobility of urban traffic flow in contact with pedestrian users are readily imaginable. Speed and mobility increase are counted as urban traffic management goals. On the other hand this speed increase causes an increase in hazard index at vehicle and pedestrian conflict points. Use of traffic signs is a solution to enhance the drivers’ caution, the performance of which depends upon a variety factors such as cultural, human, infrastructure of road and behavior of drivers and pedestrians factors. For this purpose, 69 hours videos were recorded in 13 days, were evaluated. This study was cross - sectional and conducted on the basis of observational data. Data analysis was performed using STATA 12 software and linear regression method.
In this research, using voice message signs before the pedestrian crossing place marked by ladder road horizontal signs as the crossing place and sending the voice message alarm of approaching the pedestrian crossing place on 4 different frequency channels on FM waves, the attempt was to draw incoming drivers’ attention to this situations causing a decries in number of conflicts and an increase in safety using a voice sign so that the vehicles receiver play the message for the driver. This research is based on use of traffic conflicts indexes, more precisely the Time to Collusion index (TTC). To do this, the data of conflicts was gathered using an automatic video data excavating system, analyzing videos from three different points in the city of Qom, Iran before and after using the voice message sign. The first point was near the Valieasr Hospital along with Jomhuri Eslami BLVD. The second point was also along with Jomhuri Eslami BLVD near the Basij square and the third point was along with the Shahid Navab Safavi BLVD near the Abal-Basir high school. In this research, after capturing videos from study points in both situations of usual traffic flow and traffic flow being sent the warning voice message, condition of vehicle-pedestrian conflict TTC index was evaluated. The models results showed that the use of voice sign decreases the overall conflicts by 10%, the critical conflicts by 26% and increases the time to collusion by 0.124 seconds
Article Type: Original Manuscript | Subject: ------
Received: 2017/01/17 | Accepted: 2017/03/13 | Published: 2017/12/22

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