Train doors of the Keihan Line
If any of you Kansai folks have ever rode on the Keihan Main Line, you may have noticed that seats sometimes block the doors of the train cars. Here’s a video clip from ナニコレ珍百景 showing how some of the doors are blocked and unblocked:
The trains are equipped with a unique system that raises and lowers extra seats at different times of the day. The morning rush requires more doors, but later in the day the benches automatically lower and the extra doors are deactivated.