
Merging guidance of exclusive lanes for connected and autonomous vehicles based on deep reinforcement learning
ZHANG Jian, LI Qing-yang, LI Dan, JIANG Xia, LEI Yan-hong, JI Ya-ping
Merging guidance of exclusive lanes for connected and autonomous vehicles based on deep reinforcement learning
Exclusive lanes for connected and autonomous vehicles(CAVs) will emerge in order to ensure the safety and efficiency requirements in the process of traffic flow mixed with human-driving vehicles and CAVs. When the inner lane of the expressway is set as the exclusive lane for CAVs, it has important theoretical significance and practical value to study the strategy of guiding CAVs to merge from the ordinary lane to the exclusive lane. Firstly, the entrance area of exclusive lane was designed and vehicle control rules were proposed. Secondly, with the goal of making more CAVs change lanes to the exclusive lane, the strategy of selecting lane-changing signal actions was proposed based on deep reinforcement learning. Finally, the numerical simulation was carried out with Python language compilation. The results show that the proposed algorithm can converge very quickly under 9 scenarios constructed by different factors, such as the CAV penetration rates and the proportion of CAVs arriving at the exclusive lane; it can effectively guide CAVs to merge into exclusive lanes and ensure traffic efficiency; congestion in the second lane can be significantly reduced compared to the unsignalized control when the penetration rate changes from 20% to 40%; the proportion of CAVs changing to the exclusive lane is significantly higher under the two exclusive lane entrances scenario than that under the one entrance scenario. It shows that the proposed strategy has good applicability and can provide reference for engineering construction.
engineering of transportation system / merging guidance strategy / deep reinforcement learning / expressway exclusive lane / signal control / connected and autonomous vehicle
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