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Aurora Innovation this month expanded the ranks of its driverless trucks on U.S. highways, putting a second generation of its self-driving semis on the road without a human safety driver in the cab. The company, based in Pittsburgh, says the wider rollout is a direct response to customer demand it describes as outpacing its own timelines. It is a quiet but significant escalation from the pilot-scale runs Aurora has been conducting between Dallas and Houston since last year, when a person still sat behind the wheel, ready to intervene.

The expansion arrives alongside a partnership with Volvo Group, the Swedish truck maker, which plans to put more than 300 driverless trucks on North Carolina roads by 2027. Under the arrangement, Volvo's autonomous-ready trucks will run on Aurora's driving system, hauling freight with no one behind the wheel at all — not a backup driver, not an engineer, no one. North Carolina regulators and residents are now grappling with the question that Spectrum News posed bluntly: is it safe?

That question is not rhetorical. Removing the safety driver is the industry's Rubicon — the moment a technology company stops treating autonomy as an assisted feature and starts treating it as the whole show. Aurora has spent years building toward this, logging highway miles, refining its Aurora Driver software, and courting freight customers who are less interested in the novelty of robot trucks than in the economics: no driver shortage, no hours-of-service limits, a truck that can run through the night without stopping to sleep.

For the trucking industry, which has complained for years about a chronic shortage of long-haul drivers, the appeal is obvious. Freight moves around the clock on interstates that don't care whether it's 3 a.m. or rush hour, and a driverless truck doesn't need a hotel room or a break at a truck stop. For Volvo, the deal is a bet that automation, not just electrification, will define the next generation of its trucks, and a chance to plant its flag in North Carolina before competitors do the same in other states.

But the stakes extend well beyond balance sheets. A loaded semi is a very different object than a robotaxi — heavier, slower to stop, more consequential when something goes wrong. North Carolina's highways will effectively become a proving ground for whether autonomous trucking can operate at scale without a human failsafe, watched closely by regulators in other states weighing whether to allow the same. If Aurora and Volvo's trucks perform well, it could accelerate a broader shift away from driver-operated freight. If they don't, the setback could freeze the industry's momentum for years. Either way, the era of the empty cab has quietly begun.