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Do you have this experience? Boardeding the subway, and when you find a seat, watch mobile phone ,distractek or be busy doing something, the subway started suddenly often make people off guard.
The warning handle combine the handle of subway and warnign light, so that the handle will warning passengers that less move and reduce distracted by self-luminous visual , and point out to hold the handle carefully to prevent falls intuitively.
When train stops at the station , the lights of the handle will on. When the second before the train launch or brakes , the light will flash to warn the passengers.