![](/images/graphics-bg.png)
Estimating Macroscopic Volume Delay Functions with the Traffic Density Derived from Measured Speeds and Flows
المؤلفون المشاركون
Kucharski, Rafał
Drabicki, Arkadiusz
المصدر
Journal of Advanced Transportation
العدد
المجلد 2017، العدد 2017 (31 ديسمبر/كانون الأول 2017)، ص ص. 1-10، 10ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2017-02-26
دولة النشر
مصر
عدد الصفحات
10
التخصصات الرئيسية
الملخص EN
This paper proposes a new method to estimate the macroscopic volume delay function (VDF) from the point speed-flow measures.
Contrary to typical VDF estimation methods it allows estimating speeds also for hypercritical traffic conditions, when both speeds and flow drop due to congestion (high density of traffic flow).
We employ the well-known hydrodynamic relation of fundamental diagram to derive the so-called quasi-density from measured time-mean speeds and flows.
This allows formulating the VDF estimation problem with a speed being monotonically decreasing function of quasi-density with a shape resembling the typical VDF like BPR.
This way we can use the actually observed speeds and propose the macroscopic VDF realistically reproducing actual speeds also for hypercritical conditions.
The proposed method is illustrated with half-year measurements from the induction loop system in city of Warsaw, which measured traffic flows and instantaneous speeds of over 5 million vehicles.
Although the proposed method does not overcome the fundamental limitations of static macroscopic traffic models, which cannot represent dynamic traffic phenomena like queue, spillback, wave propagation, capacity drop, and so forth, we managed to improve the VDF goodness-of-fit from R2 of 27% to 72% most importantly also for hypercritical conditions.
Thanks to this traffic congestion in macroscopic traffic models can be reproduced more realistically in line with empirical observations.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Kucharski, Rafał& Drabicki, Arkadiusz. 2017. Estimating Macroscopic Volume Delay Functions with the Traffic Density Derived from Measured Speeds and Flows. Journal of Advanced Transportation،Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1170707
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Kucharski, Rafał& Drabicki, Arkadiusz. Estimating Macroscopic Volume Delay Functions with the Traffic Density Derived from Measured Speeds and Flows. Journal of Advanced Transportation No. 2017 (2017), pp.1-10.
https://search.emarefa.net/detail/BIM-1170707
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Kucharski, Rafał& Drabicki, Arkadiusz. Estimating Macroscopic Volume Delay Functions with the Traffic Density Derived from Measured Speeds and Flows. Journal of Advanced Transportation. 2017. Vol. 2017, no. 2017, pp.1-10.
https://search.emarefa.net/detail/BIM-1170707
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-1170707
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
![](/images/ebook-kashef.png)
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر
![](/images/kashef-image.png)