Core Viewpoint - The Jinan Metro is set to implement a "Y" type operation mode for Lines 4 and 8, enhancing service capacity through a more flexible and wider coverage operational approach [3][6]. Group 1: Operation Mode - The "Y" type operation involves trains running on shared tracks for certain segments and then splitting at specific stations [5]. - From the First Medical University Station to the East Xingtai Interchange Station, both lines will operate together, after which they will diverge towards their respective destinations [5]. Group 2: Flexibility in Operations - The metro will adopt two operational modes based on passenger flow: - Through operation during peak hours, allowing direct travel from the First Medical University Station to either Pengjiazhuang or Qingyuanda Street without transfers [6]. - Independent operation during off-peak times, with each line running separately, enhancing scheduling flexibility [6]. Group 3: Passenger Guidance - To assist passengers, the Jinan Metro has provided a mnemonic for boarding: "Look, Listen, Wait, Recognize," emphasizing the importance of checking destination information and listening to announcements [9]. - The "Y" type operation aims to expand service coverage, reduce transfer times for passengers on shared segments, and improve overall travel experience [9].