Journal
TRANSPORTATION RESEARCH PART B-METHODOLOGICAL
Volume 93, Issue -, Pages 560-575Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.trb.2016.08.008
Keywords
Three-phase traffic theory; Traffic oscillations; Cellular automaton
Categories
Funding
- National Natural Science Foundation of China [71401120, 71431005, 71671123]
- Natural Science Foundation of China [11422221, 71371175, 71631002, 71621001]
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This paper firstly shows that a recent model (Tian et al., Transpn. Res. B 71, 138-157, 2015) is not able to replicate well the concave growth pattern of traffic oscillations (i.e., the standard deviation of speed is a concave function of the vehicle number in the platoon) observed from car following experiments. We propose an improved model by introducing a safe speed and the logistic function for the randomization probability. Simulations show that the improved model can reproduce well the metastable state, the spatiotemporal patterns, and the phase transitions of traffic flow. Calibration and validation results show that the concave growth pattern of oscillations and the empirical detector data can be simulated with a quantitative agreement. (C) 2016 Elsevier Ltd. All rights reserved.
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