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Published February 01, 2014, 12:00 AM

The heads of DOT-111s are also prone to punctures


The heads of DOT-111s are also prone to punctures, according to the NTSB. New federal regulations in the works would require that tank car heads be built with thicker steel and be protected on both ends by an extra metal shield. David Samson / The Forum


Read the article: The Crude Frontier: Oil on the rails raises old risks, new worries