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A multi-class lane-changing advisory system for freeway merging sections using cooperative ITS

Sharma Salil, Papamichail Ioannis, Nadi Ali, van Lint Hans, Tavasszy, Lorant A, Snelder, Maaike, 1980-

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Year 2022
Type of Item Peer-Reviewed Journal Publication
Bibliographic Citation S. Sharma, I. Papamichail, A. Nadi, H. Van Lint, L. Tavasszy and M. Snelder, "A multi-class lane-changing advisory system for freeway merging sections using cooperative ITS," IEEE Trans. Intell. Transp. Syst., vol. 23, no. 9, pp. 15121-15132, Sept. 2022, doi: 10.1109/TITS.2021.3137233.
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Cooperative intelligent transportation systems (C-ITS) support the exchange of information between vehicles and infrastructure (V2I or I2V). This paper presents an in-vehicle C-ITS application to improve traffic efficiency around a merging section. The application balances the distribution of traffic over the available lanes of a freeway, by issuing targeted lane-changing advice to a selection of vehicles. We add to existing research by embedding multiple vehicle classes in the lane-changing advisory framework. We use a multi-class multi-lane macroscopic traffic flow model to design a feedback-feedforward control law that is based on a linear quadratic regulator (LQR). The weights of the LQR controller are fine-tuned using a response surface method. The performance of the proposed system is evaluated using a microscopic traffic simulator. The results indicate that the multi-class lane-changing advisory system is able to suppress shockwaves in traffic flow and can significantly alleviate congestion. Besides bringing substantial travel time benefits around merging sections of up to nearly 21%, the system dramatically reduces the variance of travel time losses in the system. The proposed system also seems to improve travel times for mainline and ramp vehicles by nearly 20% and 42%, respectively.