The US National Highway Traffic Safety Administration (NHTSA) has announced a historic rule to modernize driverless vehicle safety standards.

The new rule aims to clarify ambiguities in current occupant protection standards for vehicles equipped with automated driving systems that are designed without traditional manual driver controls.

The rule amends several crashworthiness regulations to clarify safety standards for automated vehicles equipped without manual driver controls. The rule also exempts automated vehicles designed never to carry any human occupants, including human drivers, from crashworthiness standards.

“With more than 90 percent of serious crashes caused by driver error, it’s vital that we remove unnecessary barriers to technology that could help save lives,” said Deputy Administrator James Owens said.

“We do not want regulations enacted long before the development of automated technologies to present an unintended and unnecessary barrier to innovation and improved vehicle safety.”

NHTSA’s final rule is one of a series of regulatory actions that NHTSA has taken to further modernize vehicle standards for new technologies.