I'm doing an internship isosorbide mononitrate brand name Metro-North is in the process of installing the technology. It now has what's called an automatic train control signal system, which automatically applies a train's brakes if an engineer does not respond to an alert that indicates excessive speed. These systems would slow trains, but not bring them to a halt. 必須 2000文字以内 [bbs:youtube:(Youtubeの動画ID)]と書くとYoutubeの動画が貼れます。(例:[bbs:youtube:OQThUAQ0UN0])