By last month, state transportation officials in Missouri said they had seen enough.
Federal highway officials had long insisted that guardrails throughout the state were safe. But some guardrail heads had apparently malfunctioned, in essence turning the rails into spears when cars hit them and injuring people instead of cushioning the blow, Missouri officials said.
Read the rest of the story here: http://www.nytimes.com/2014/10/13/business/highway-guardrail-may-be-deadly-states-say.html?_r=1
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