Education || history || technology on Instagram: "These emergency ramps protect drivers when truck brakes fail on steep roads. Filled with deep gravel or sand, they slow and stop multi-ton vehicles within seconds, reducing the risk of deadly crashes. . . They are placed on mountain highways where brake failure is most likely and have saved thousands of lives worldwide. You should always watch for them and understand their purpose when driving in hilly areas. #knowledge #history #innovation #tech

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