Obama railroad regulations would not have prevented Ohio train derailment because the train was not considered 'high-hazard'.

A high-hazard flammable unit train was defined as a train going faster than 30 miles per hour with at least 70 loaded tank cars containing certain highly flammable liquids, such as crude oil and ethanol.

However, even if this safety rule had still been in effect, it would not have applied to the Norfolk Southern train that derailed in East Palestine, because it was not categorized as a high-hazard cargo train.