Job cuts at the US traffic safety regulator instigated by Elon Musk’s so-called Department of Government Efficiency disproportionately hit staff assessing self-driving risks, hampering oversight of technology on which the world’s richest man has staked the future of Tesla.

Of roughly 30 National Highway Traffic Safety Administration workers dismissed in February as part of Musk’s campaign to shrink the federal workforce, many were in the “office of vehicle automation safety”, people familiar with the situation told the Financial Times.

The cuts are part of mass firings by Doge that have affected at least 20,000 federal employees and raised widespread concern over potential conflicts of interest for Musk given many of the targeted agencies regulate or have contracts with his businesses.