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WASHINGTON — Congressional Democrats are protesting President Donald Trump’s decision to remove the Transportation Department’s acting inspector general, the latest in a string of actions by Trump to fire or replace government watchdogs.

The Pipeline and Hazardous Materials Safety Administration has issued a final rule that requires railroads to develop and submit comprehensive oil spill response plans for route segments traveled by high-hazard flammable trains.

The Pipeline and Hazardous Materials Safety Administration has pre-empted motor carriers hauling hazardous materials, explosives and security-sensitive cargo from California’s meal-and-rest-break requirements.

The Pipeline and Hazardous Materials Safety Administration has requested information on the use of automated technologies in the transportation of hazardous materials, according to a document published in the Federal Register March 22.

The Pipeline and Hazardous Materials Safety Administration on March 30 issued a final rule that amends U.S. hazardous materials regulations to harmonize them with international regulations and standards.

Three universities will examine ways to improve pipeline safety with the help of a grant from the U.S. Department of Transportation’s pipelines division announced this week.

The Pipeline and Hazardous Materials Safety Administration is seeking comment on a request by the National Tank Truck Carriers that the agency make an administrative determination whether federal hazmat transportation law preempts California meal and rest break requirements for hazmat carriers.