Section 7308 of the Fixing America’s Surface Transportation Act (FAST Act; P. L. 114-94; December 4, 2015) requires the U.S. Department of Transportation (DOT) to assemble and collect data on rail tank cars transporting Class 3 flammable liquids (box A). The objective of this legislation is to track the progress in upgrading the rail tank car fleet to new safety requirements and to provide an annual status report to Congress.

In September 2017, the Bureau of Transportation Statistics sent its first report to Congress, Fleet Composition of Rail Tank Cars that Transport Flammable Liquids: 2013-2016

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