Abstract




 
   

IJE TRANSACTIONS C: Aspects Vol. 30, No. 12 (December 2017) 1523-1530    Article in Press

PDF URL: http://www.ije.ir/Vol30/No12/C/12.pdf  
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  (RESEARCH NOTE)
 
I. Barg E, V. Najafi Moghaddam and F. Jamshidpour
 
( Received: June 17, 2017 – Accepted: September 08, 2017 )
 
 

Abstract    Travels within the city are done in different ways, by vehicle or on foot. Thus, inevitably, a part of the travel is always done on foot. Since intersections as traffic nodes are determinant factor in transportation network capacity, any disruption in them leads to severe reduction in network capacity. Unfortunately, pedestrian behavior has received little attention in Iran. While this is a very important and effective part of traffic engineering. In some cases, pedestrians are the main cause of increasing road users’ delay, therefore, the most important action before anything, is identifying the characteristics of pedestrians. Identifying issues such as speed, volume and density of pedestrians are necessary to control the traffic flow and delay, and can lead to better design of facilities associated with pedestrians. Cases that are studied in this study are: the relationship between speed, density and pedestrians’ flow rate while crossing the street. In this study, the data was collected by filming four intersections in Rasht Metropolis for 15 hours, and the number of pedestrians crossing were studied was 8489. Two intersections had traffic lights and the other ones had no traffic lights. Then, the relationship between speed, density and volume of pedestrians were obtained by determining the variables of speed, density and volume of pedestrians and using linear and nonlinear regression method and finding the correlation coefficient between the variables. The results showed that for pedestrians, there is a relationship between the flow rate and density with a high correlation coefficient in crossing through crosswalk (R2=0.99) and outside the crosswalk (R2=0.99). But the relationship between speed and flow rate was not significant (crossing through crosswalk, R2=0.29 and outside the crosswalk, R2=0.24), furthermore, speed and density have no significant relationship (crossing through crosswalk, R2=0.36 and outside the crosswalk, R2=0.28).

 

Keywords    Pedestrian, Crosswalk, Intersection, Speed, Density, Flow rate.

 

چکیده    سفرهای درون‌شهری به شکل‌های مختلف، با وسایل نقلیه یا به‌صورت پیاده انجام می­شود، لیکن در تمامی سفرها بخشی از سفر ناگزیر به‌صورت پیاده انجام می­گیرد. از آنجا که تقاطع‌ها به‌عنوان گره‌های ترافیکی عامل تعیین‌کننده‌ی ظرفیـت شبکه حمل‌ونقل می­باشند ، هرگونه­ اختلال در آن‌ها باعث کاهش شدید ظرفیـت شبکه می­شود. متأسفانه در ایران توجه به رفتار ترافیکی عابران پیاده کمتر موردتوجه قرار گرفته است و این درحالیست که این قسمت از بخش‌های بسیار مهم و اثرگذار مهندسی ترافیک است و در برخی موارد عابران پیاده دلیل اصلی افزایش تأخیر کاربران راه می­باشند، لذا مهم‌ترین اقدام قبل از هر چیز شناخت ویژگی‌های عابران است. شناخت مواردی از قبیل سرعت، حجم و چگالی عابران پیاده امری ضروری جهت کنترل جریان ترافیک و میزان تأخیر است و می­تواند به طراحی بهتر امکانات مرتبط با عابران منتهی شود. مواردی که در این پژوهش مورد مطالعه قرار می‌گیرند عبارتند از: رابطه میان سرعت، چگالی و نرخ جریان عابران پیاده در عبور از عرض خیابان. در این پژوهش با تصویربرداری از چهار تقاطع به مدت 15 ساعت در کلانشهر رشت اقدام به جمع آوری اطلاعات گردید و تعداد 8489 عابر عبوری مورد بررسی قرار گرفتند. دو تقاطع مورد بررسی چراغدار و دو تقاطع دیگر بدون چراغ بودند. سپس با تعیین متغیرهای سرعت، چگالی و حجم عابران پیاده و با روش رگرسیون خطی و غیرخطی و یافتن ضریب همبستگی بین متغیرها، روابط بین سرعت، چگالی و حجم عابران پیاده بدست آورده شدند. نتایج نشان داد برای عابران پیاده، بین نرخ جریان و چگالی یک رابطه با ضریب همبستگی بالا در عبور از خط­کشی (99/0= R²) و در عبور از محل­های غیر خط­کشی (99/0=R²) برقرار است، اما ارتباط بین متغیرهای سرعت و نرخ جریان معنادار نبود (در عبور از خط­کشی 29/0= R²و در عبور از محل­های غیر خط­کشی 24/0=R²)، همچنین سرعت و چگالی نیز ارتباط معناداری با یکدیگر ندارند (در عبور از خط­کشی 36/0= R² و در عبور از محل­های غیر خط­کشی 28/0=R²).

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