The Pipeline and Hazardous Materials Safety Administration (PHMSA) announced today that it is withdrawing its January 2017 Advanced Notice of Proposed Rulemaking (ANPRM) regarding vapor pressure for unrefined petroleum products and other flammable liquids. The decision follows an extensive study conducted by Sandia National Laboratories and the review of public comments regarding the role of vapor pressure limits in the transportation of crude oil and other flammable liquids by rail. The Sandia study concluded that imposing vapor pressure limits would not reduce the risks of transporting crude oil and other flammable liquids by rail. 

In its decision to withdraw the ANPRM, PHMSA is no longer considering vapor pressure limits for the transport of crude oil by rail.

Read PHMSA's withdrawal notice for more details.