Waymo has initiated a voluntary recall of 3,871 robotaxis across the United States following a software vulnerability that allowed driverless vehicles to inadvertently enter active freeway construction zones. The recall was filed with the National Highway Traffic Safety Administration this week after the company documented 13 separate incidents between April and May. Six occurrences took place in Phoenix, where vehicles failed to recognize ramp-closure signage, while seven others were reported in the San Francisco Bay Area, involving cars navigating between traffic cones to access closed lanes. Regulatory records indicate no collisions or injuries resulted from these incursions. In response to the software flaw, Waymo has temporarily restricted its autonomous vehicles from operating on high-speed roadways while engineering teams develop a permanent patch. A company spokesperson confirmed the proactive steps taken, noting that state and federal regulators were notified immediately upon discovery. This action marks the automaker’s second voluntary recall this year and the sixth overall for its robotaxi fleet. Previous recalls have addressed issues ranging from misjudging the trajectory of towed vehicles and failing to halt for stopped school buses to navigating unexpected floodwaters and static obstacles. The latest safety measure arrives amid heightened regulatory scrutiny, as federal authorities continue to investigate a January collision involving a Waymo vehicle and a pedestrian near a Santa Monica elementary school. The company first earned approval for fully autonomous freeway travel in the United States approximately seven months ago, but recurring software edge cases continue to test the scalability of its commercial operations. Waymo has not provided a timeline for the restoration of unrestricted highway service, emphasizing that the current recall remains a precautionary measure to align its operational parameters with real-world road hazards.