A rule adopted in 2016 in response to a congressional directive requires that new hybrid and electric vehicles emit sounds when traveling at low speeds to alert pedestrians and cyclists to their approach. 

…DOT has withdrawn a rule it was in the early stages of writing to require that states annually inspect commercial buses and other passenger-carrying vehicles. Since 1990, there have been more than 220 commercial bus crashes and fires resulting in at least 484 deaths and 4,618 injuries, according to Advocates for Highway and Auto Safety, which tracks crashes through media reports.

…A rule proposed in 2015 would expand safety requirements for oil and natural gas pipelines, including greater reporting, inspections of pipelines within 72 hours of an extreme weather event or natural disaster, more frequent inspections using tools that can look inside pipes, and greater use of leak detection systems.

…The rule requires industry to follow the American Petroleum Institute’s recommended practices for the design and operation of underground natural gas storage facilities. The gas industry wants portions of the rule to be voluntary guidance, rather than mandatory regulations, and they want up to eight years instead of one year to fully implement the rule. PHMSA has said it won’t enforce the portions that have drawn industry opposition while it is reconsidering the rule.

A look at transportation safety rules sidelined under Trump

hmmm