Temple of Janus (Roman Forum) Temple of Janus (Roman Forum) In ancient Rome, the main Temple of Janus as it is often called, although it was not a normal temple, stood in the Roman Forum near the Argiletum. It had doors on both ends, and inside was a statue of Janus, the two-faced god of boundaries. The doors (the "Gates of Janus") were closed in times of peace and opened in times of war. According to Livy 1.19 the second king of Rome, Numa Pompilius, decided to distract the early, warlike Romans from their violent ways by instilling in them awe and reverence. His projects
Platform screen doors be subsequently crushed when the train begins to move (see ). Cases of this happening are rare, and may depend upon door design. Half-height platform doors, or automatic platform gates, are chest-height sliding doors at the edge of railway platforms to prevent passengers from falling off the platform edge onto the railway tracks. Like full-height platform screen doors, these platform gates slide open or close simultaneously with the train doors. Half-height platform gates are cheaper to install than platform screen/edge doors, which require more metallic framework for support. Some railway operators may therefore prefer such an option to improve safety