亦庄线、5号线贯通改造年底开工，宋家庄站每天超7万人次免换乘

Core Viewpoint - The environmental impact report for the connection line project between Beijing's Yizhuang Line and Lines 5 and 10 has been successfully approved, with construction expected to start by the end of this year and completion projected for December 2028 [1][2]. Group 1: Project Overview - The project involves a connection line approximately 2.7 kilometers long, with 2.2 kilometers of new construction and 0.5 kilometers utilizing existing lines, all underground [2]. - The connection will allow direct operation between the Yizhuang Line and Line 5, and facilitate transfers with Line 10, enhancing connectivity in the region [1][3]. Group 2: Passenger Impact - The project is expected to eliminate the need for transfers for approximately 71,000 passengers daily at Songjiazhuang Station, which is currently the busiest transfer station in Beijing's rail network [3][4]. - The changes will reduce transfer pressure during peak hours by about 10,000 passengers each in the morning and evening [4]. Group 3: Operational Efficiency - The integration of the Yizhuang Line, Line 5, and Line 10 will lead to shared resources for vehicle maintenance and operations, optimizing resource allocation and reducing operational costs [5]. - The project aims to enhance the overall service level and efficiency of the subway system, improving the urban landscape of the area [5]. Group 4: Public Engagement and Environmental Concerns - During the public consultation phase, 27 individual opinions were collected, with concerns primarily focused on construction noise and vibration during operation [6]. - The environmental assessment includes measures to mitigate noise and vibration impacts, ensuring compliance with relevant standards [6].