北京18号线开始空载试运行，年底有望开通

Core Viewpoint - The Beijing Metro Line 18, derived from the ongoing expansion of Line 13, is crucial for connecting northern Haidian and the Changping "Huitian area," and it has begun a trial operation phase lasting at least three months to prepare for its expected operational launch by the end of the year [1][3]. Group 1: Project Overview - The Line 18 connects major residential areas in northern Haidian, the Zhongguancun Software Park, and the Changping "Huitian area," serving as a key east-west route in northern Beijing [1]. - The trial operation phase includes comprehensive testing and calibration of vehicles, power supply, signaling, and communication systems, ensuring all components work seamlessly together [1][3]. Group 2: Technical Specifications - The trial operation utilizes the lightest metro train in Beijing, a 4-carriage, 2-drag, 6B configuration, with a maximum passenger capacity of 2,016 and a top speed of 80 km/h [3]. - The new trains are approximately 12 tons lighter than those on the existing Line 13, significantly reducing energy consumption [3]. - Enhanced passenger comfort is provided with a 10 cm higher ceiling in the carriages compared to the current Line 13 trains, accommodating taller individuals better [3]. Group 3: Additional Features - The new trains are equipped with carbon fiber electric heating seats, offering increased warmth and comfort during winter rides [5].