DocumentCode :
3681647
Title :
A Hybrid Kinematic Wave Model Incorporating Capacity Drops
Author :
Kai Yuan;Victor Knoop;Thomas Schreiter;Serge P. Hoogendoorn
Author_Institution :
Dept. of Transp. &
fYear :
2015
Firstpage :
471
Lastpage :
476
Abstract :
Literature indicates that on a freeway the capacity is higher than the queue discharge rate. This is called the capacity drop. Recent studies show that the queue discharge rate increases as the speed in congestion increases. For many applications, such as dynamic speed limit control design and evaluation, macroscopic models are needed. A kinematic wave model aiming to assess consequences of control strategies should firstly reproduce different queue discharge rates depending on congestion states, and secondly capture the capacity drop for both standing queues and stop-and-go waves. However, no such kinematic wave model exists until now. Therefore, this paper fills in the gap, incorporating the capacity drop into a kinematic wave model. The new model can reproduce different queue discharge rates corresponding to the vehicular speed in congestion, which means the new model can reproduce speed limit effects accurately. By formulating the model in Lagrangian coordinates and applying an upwind discretization method, this paper presents a hybrid model which captures the capacity drop with stop-and-go waves and can be applied to reproduce the capacity drop with standing queues. A case study shows the working of the model with two different queues.
Keywords :
"Kinematics","Acceleration","Numerical models","Vehicles","Traffic control","Discharges (electric)","Hysteresis"
Publisher :
ieee
Conference_Titel :
Intelligent Transportation Systems (ITSC), 2015 IEEE 18th International Conference on
ISSN :
2153-0009
Electronic_ISBN :
2153-0017
Type :
conf
DOI :
10.1109/ITSC.2015.84
Filename :
7313176
Link To Document :
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