No self-driving semi has crashed on a California freeway. None has even been allowed to try. That is the detail missing from most of the coverage of Teamsters California’s new lawsuit against the state’s DMV, and it is the detail that actually matters. On August 5, Teamsters California filed a writ of mandate in Alameda County Superior Court asking a judge to void the DMV’s April 2026 regulations, which opened California roads to autonomous commercial trucks weighing 10,001 pounds or more. The union says the agency broke state law by dodging a full economic study, then compounded the problem by claiming the new rule would not eliminate a single job. Read past the safety headline and the real fight is over four words buried in California’s rulemaking process: no significant statewide impact. State law lets an agency skip a full economic impact study, the kind meant to catalog who wins, who loses, and how many paychecks disappear, if a regulation is expected to produce less than $50 million in costs or benefits during its first year. That threshold exists so the DMV doesn’t need to convene an economic task force every time it renumbers a form. Teamsters California says the DMV ran an entire new category of vehicle through that same fast lane. According to the lawsuit, the agency priced the rule’s cost almost entirely as compliance paperwork, the expense of filing incident reports, while pricing its effect on California’s roughly 200,000 unionized big-rig drivers at zero. That 10,001-pound line isn’t arbitrary, by the way. It’s the same weight class the federal government uses to define a commercial motor vehicle, the threshold above which a human has always needed a commercial driver’s license to be behind the wheel. The new rule is written so that once a company convinces the