Ann Carlson, acting head of the National Highway Traffic Safety Administration, said Friday she is leaving her role on Dec. 26, Reuters reported Friday. Carlson oversaw numerous NHTSA investigations into Tesla’s Autopilot driver assist system, as well as ongoing efforts to require automakers to improve fuel economy.
NHTSA did not immediately respond to a request for comment.
According to Reuters, Carlson told employees in an email that she is stepping down due to a law limiting how long officials can remain in a temporary role. She previously served as NHTSA’s chief counsel, where she helped advance the agency’s oversight of vehicles equipped with automated driving systems and advanced driver assistance systems.
NHTSA Deputy Administrator Sophie Shulman will replace Carlson as acting administrator. She previously served as deputy chief of staff for policy at the U.S. Department of Transportation.