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Autoalarm Guardrail aims to help people in traffic accidents, especially when no help is around. It warns oncoming traffic of the accident ahead, thus avoiding a potential second accident.This product has autoalarm system and caution light. On roads in sparsely populated, low visibility and dangerous places, once a car crashes into the guardrail, the caution light would switch on to warn the approaching vehicles . Meanwhile, because of the open circuit, the broken guardrail would automatically transmit the signal to the nearest police station and hospital to get help. Then, the inner GPS device will report the specific location to the police.